Licensed · Bonded · Insured · BBB Accredited · VA SAH / SHA Grant Contractor · Since 2022

Mother in Law Suite Addition: Attached In-Law Suites, Garage Conversions and Accessible Ground-Floor Living, Managed End-to-End by Your Dedicated Project Manager

A mother in law suite addition is a private bedroom, bathroom, and sitting area built onto or inside your existing home so a parent, adult child, or caregiver can live with you without living on top of you.

Wise Builders Roofing and Renovations is the in law suite contractor families across Mobile County, Baldwin County, and the Gulf Coast call for attached in-law suites, garage conversions, and bonus room conversions.

We are a design-build general contractor and a VA SAH and SHA grant contractor, so an accessible suite for an aging parent or a disabled veteran is drawn, permitted, and built by the same team, under one contract.

Every suite runs through one dedicated project manager. One point of contact. One fixed price in writing. One firm timeline, with an update on every active work day.

You get a BBB-accredited team, a 100% satisfaction guarantee, and a 5.0 average across 160+ Google reviews. Call (251) 305-7282 for a free in-home design consultation anywhere on the Alabama or Mississippi Gulf Coast.

★★★★★ 5.0 on Google · 160+ verified reviews · Free in-home consultation · Licensed, bonded & insured

Schedule a free analysis today

5.0Google rating
160+Verified reviews
100%Satisfaction guarantee
2022Serving the Gulf Coast since
Atlas Pro Certified VA SAH / SHA grant contractor Design-build under one contract
What It Is

What a Mother in Law Suite Addition Is and Who Builds One

A mother in law suite addition is a self-contained living area attached to a single-family home, with its own bedroom, full bathroom, and sitting or dining space, and usually a kitchenette rather than a full kitchen. It stays part of the principal dwelling, which is what separates it from an accessory dwelling unit.

Families on the Gulf Coast build them for the same reasons families everywhere do. Pew Research counted 59.7 million Americans, 18% of the population, living in multigenerational households as of 2021, four times the 1971 count. Finances and caregiving are the top two drivers.

The AARP 2024 Home and Community Preferences Survey found 75% of adults 50 and older want to remain in their current home, and roughly half expect to need modifications to do it. An in-law suite lets a parent stay with family instead of moving into assisted living, in a space built for how they will move through it in ten years.

Who a Mother in Law Suite Addition Is Built For

Press here to open

Most of the in-law suite work we take on falls into one of a handful of situations. Each one changes the floor plan, so we ask about it before we measure anything.

  • A parent in their 70s or 80s moving in from out of state who needs step-free entry, a curbless shower, and a bathroom a walker fits in.
  • A disabled veteran parent or spouse whose accessible suite can be funded in part or in full through a VA SAH, SHA, or HISA grant.
  • An adult child, college graduate, or newlywed couple who needs a separate entrance and privacy more than a roll-in shower.
  • A live-in caregiver or home health aide who needs a private room close to the person they are caring for.
  • A homeowner planning ahead for their own aging in place, building the accessible suite now and renting or hosting guests in it until they need it.
  • A family that wants a guest suite addition for the summer months when relatives come to the coast, with a plan to convert it to a parent's suite later.

Suite or ADU: Where a Mother in Law Suite Crosses the Line

Press here to open

An in-law suite and an accessory dwelling unit are different things under both counties' rules, and the difference is mostly about the kitchen. The City of Mobile Unified Development Code, Chapter 64, defines a dwelling unit by three things: sleeping, bathing, and cooking.

Add a full range and a full kitchen and the suite becomes a second dwelling unit. An attached in law apartment with its own full kitchen is, legally, an ADU, even if it shares a wall with your living room.

That reclassification matters because an ADU in Mobile has to meet Chapter 64 rules: one ADU per lot in R-A, R-1, and R-2 districts, capped at 1,000 square feet or 50% of the principal structure, whichever is smaller.

In Baldwin County planning districts that have adopted zoning, accessory dwellings are generally capped at 60% of the principal residence, up to 1,200 square feet. Zoning only applies in districts that adopted it, so the first step on a Baldwin lot is confirming whether it is zoned at all.

An accessible ground-floor remodel by Wise Builders Roofing and Renovations with a step-free layout
Mother in Law Suite Addition
FeatureMother-in-Law Suite (Attached)Accessory Dwelling Unit
CookingKitchenette: sink, microwave, undercounter fridge, no rangeFull kitchen with range and full-size appliances
ClassificationPart of the principal single-family dwellingSeparate dwelling unit under Mobile UDC Chapter 64
EntranceInterior connecting door, optional separate exterior entranceIndependent entrance expected
Zoning reviewStandard residential additionOne per lot, R-A, R-1, R-2 only in Mobile; 1,000 sq ft or 50% cap
Baldwin County size capNone specific to the suite; addition setbacks apply60% of principal residence, up to 1,200 sq ft in zoned districts
Owner occupancyNot applicableNot required in Mobile; confirm in Baldwin planning districts
UtilitiesShares the home's meter and panel, usually with a subpanelOften separately metered
AppraisalValued as additional finished square footageOften valued as income-producing unit
★★★★★Google Review

"They made my old house into a beautiful home. I really appreciated the way they approached it, it is like they were working on their own home."

Larry Robinson, Google review, June 2026

Three mother-in-law suite configurations built by Wise Builders Roofing and Renovations on the Alabama Gulf Coast: an attached slab-on-grade in-law suite addition with a separate entrance, a garage conversion in-law suite with the garage door replaced by an insulated wall and impact-rated windows, and a finished bonus room over the garage. The image reflects a licensed design-build contractor pricing additions at $125 to $250 per square foot for multigenerational families.
Configurations
Configurations

Mother in Law Suite Addition Configurations and What Each One Costs

An in-law suite can be built three ways on most Gulf Coast homes: a new attached addition, a garage conversion, or a conversion of the bonus room over the garage. The right one depends on who is moving in, how they get around, and what your lot allows.

Basements are essentially nonexistent here. Gulf Coast homes sit on slabs or piers because of the water table, so a ground-floor, slab-on-grade suite is the default and, for aging in place, the best option. Everything is on one level with no stairs between the suite and the rest of the house.

ConfigurationTypical SizeWise Builders RangeBest ForAging-in-Place Fit
Attached in-law suite addition400 to 700 sq ft$75,000 to $170,000 ($125 to $250 per sq ft)Parents, veterans, long-term aging in placeExcellent: step-free, new slab, curbless shower poured right
Garage conversion in-law suite400 to 600 sq ft$25,000 to $60,000 (Angi 2026 national $20,000 to $60,000)Budget-conscious families, adult children, caregiversGood: ground level, but slab elevation and ramp at the old garage door need design
Bonus room (FROG) conversion300 to 500 sq ft$25,000 to $60,000 (conversion end of Angi in-law suite range)Adult children, students, guestsPoor: stairs rule it out for most parents

Ranges reflect Wise Builders' addition pricing of $125 to $250 per square foot and $34,000 to $170,000 per project, with national conversion figures from Angi labeled as national. Your free in-home consultation turns the range into one fixed number.

In-Law Suite Floor Plans That Work

In law suite floor plans succeed or fail on circulation. A parent with a walker needs a straight path from the entrance to the bed to the toilet, with no tight turns. These are the three layouts we draw most often.

Floor PlanSizeLayoutWho It Suits
Studio suite350 to 450 sq ftBedroom and sitting area in one room, accessible bath, kitchenette along one wallA single parent who wants everything within a few steps
One-bedroom suite500 to 650 sq ftSeparate bedroom, living room with kitchenette, accessible bath, walk-in closetA couple, or a parent who hosts grandchildren
Caregiver suite600 to 750 sq ftOne-bedroom layout plus a second small bedroom or office for a live-in aideFamilies with a home health aide or a parent with higher care needs
★★★★★Google Review

"Wise Builders stand by their work! My husband and I had a two car garage addition and patio added to our home by another contractor. We called Wise Builders to remediate the problem, and the owner Cody came out personally to check things out. We were very happy with the work. I would not hesitate to call Wise Builders again."

Jennifer Ross, Google review, June 2026

Aging in Place

Aging-in-Place Remodel Standards Built Into Every Suite

An aging in place remodel designs a space around how a person will move through it at 85, not at 65. Universal design, the framework behind it, means step-free entry, wide openings, and controls anyone can reach and operate. It is far cheaper to build in during new construction than to retrofit after a fall.

We build to the guidelines taught in the NAHB Certified Aging-in-Place Specialist (CAPS) program, a three-course credential for remodelers who design for older adults. The specs below are the ones that show up in nearly every suite we draw.

A bathroom with new tile remodeled by Wise Builders Roofing and Renovations in Mobile, Alabama
Aging-in-Place
Accessibility FeatureSpecificationWhy It Matters
Interior and exterior doors36-inch doors with a 32-inch clear openingADA and universal design minimum for wheelchair and walker passage
Turning space60-inch turning radius (5-foot clear circle) in bathroom and bedroomLets a wheelchair turn without backing up; drives the minimum size of an accessible bath
Entry ramp1:12 slope, one inch of rise per foot of run, with landingsA 24-inch entry rise needs a 24-foot ramp; landings every 30 feet of run and at every turn
ToiletComfort-height, 17 to 19 inches seat heightReduces knee and hip strain, safer transfers
Grab barsSide wall bar 33 to 36 inches above the floor beside the toilet; rear wall bar behind the toilet; vertical bar at the shower entry; horizontal bar 33 to 36 inches inside the showerSupports transfers and standing; AARP found 72% of adults 50+ expect to need them
Grab bar blockingSolid 2x blocking inside shower, toilet, and tub walls during framingBars can be added anywhere later without opening the wall
ShowerZero-threshold (curbless) with linear drainRoll-in access, no lip to trip over
Vanity and countersRoll-under vanity with open knee space, counters at 34 inchesUsable seated or standing
HardwareLever door handles and single-lever faucetsOperable with a closed fist or forearm
Lighting and controlsRocker switches 42 to 48 inches high, outlets 18 inches or higher, motion-sensor night lightingReachable from a seated position, safer at night
FlooringSlip-resistant tile or luxury vinyl plank, no transitionsReduces fall risk from thresholds and rugs

Step-Free Entry and Ramp Design

Step-free entry starts with the slab. On an attached addition, we pour the new slab at the same elevation as the existing floor so there is no threshold at the connecting door. At the separate exterior entrance, a covered landing and a ramp at 1:12 slope handle the drop to grade.

The 1:12 Rule in Practice

One inch of rise needs one foot of ramp. A slab that sits 24 inches above grade, common on piers and in flood zones, needs 24 feet of ramp plus a 5-foot landing at the top, the bottom, and every change of direction. On a tight lot, that often means a switchback ramp or grading the yard up toward the entry instead.

Doors, Halls and Turning Space

Every door in the suite is a 36-inch door, which gives a 32-inch clear opening with the door open 90 degrees. Hallways run 42 inches or wider. The bathroom and the bedroom each hold a 60-inch turning radius, a 5-foot clear circle, so a wheelchair or walker can turn without a three-point maneuver.

The Accessible Bathroom Addition

An accessible bathroom addition is the heart of an in-law suite and the room where most falls happen, so it gets the most design attention. The minimum footprint that fits a 60-inch turning circle, a roll-in shower, a comfort-height toilet with side transfer space, and a roll-under vanity is about 8 by 10 feet.

01

Zero-Threshold Shower

A zero-threshold shower has no curb. The floor slopes to a linear drain along one wall, and the waterproofing runs continuous from the shower floor across the bathroom floor. It is easiest to build in a new slab pour, which is one more reason an attached addition beats a retrofit for a parent's suite.

02

Comfort-Height Toilet and Grab Bars

A comfort-height toilet seats at 17 to 19 inches, about two inches higher than a standard toilet, which reduces knee and hip strain and makes a transfer from a wheelchair safer. Grab bars mount 33 to 36 inches above the floor beside and behind the toilet, into solid 2x blocking we install during framing.

03

Roll-Under Vanity and Lever Controls

A roll-under vanity has open knee space beneath a 34-inch counter, so a seated person can reach the sink and the mirror. Single-lever faucets and lever door handles operate with a closed fist or a forearm, which matters for arthritis as much as for a wheelchair.

For a full look at how we waterproof and detail a coastal bathroom, see our bathroom remodeling page.

★★★★★Google Review

"Wise Builders recently renovated our bathroom (floor, walls, ceiling, trim, vanity, vent, outlets) and did a fantastic job! Not one time did I have to ask them to go back and fix something that was not right. They were also very helpful in finding the best solution when we encountered some unforeseen issues."

Sharon Adcock, Google review, August 2025

An older Gulf Coast home interior renovated by Wise Builders Roofing and Renovations
Privacy and Soundproofing
Privacy

Privacy and Soundproofing Between the Suite and the Main House

Privacy is what makes a multigenerational home addition work for the long term. Sound is the part families forget until the first week, when the television in the suite and the grandchildren in the kitchen are on opposite sides of one 2x4 wall.

Sound Transmission Class, or STC, is the rating that describes how much sound a wall assembly blocks. A typical interior wall with half-inch drywall on both sides of a 2x4 stud wall lands around STC 33, where normal conversation is clearly heard. We build the shared wall to STC 50 or higher, where loud speech is not audible.

Shared Wall AssemblyApproximate STCWhat You Hear Through It
Standard 2x4 wall, 1/2-inch drywall each side, no insulation33Normal conversation is clearly heard and understood
2x4 wall with Rockwool Safe'n'Sound mineral wool38 to 40Loud speech is heard but hard to understand
Mineral wool plus resilient channel on one side45 to 47Loud speech is a murmur
Mineral wool, resilient channel, double 5/8-inch drywall50 to 52Loud speech is not audible; conversation inaudible
Mineral wool, sound isolation clips and hat channel, double 5/8-inch drywall55 to 58Only very loud sounds such as a television at full volume come through faintly
Solid-core connecting door with weatherstripping and sweepRaises door from about STC 20 to 30+Closes the weakest point in the wall

How We Build the Shared Wall

The shared wall between the suite and the main house is the one wall we treat as a specification, not a framing detail. Each layer breaks a different path the sound travels.

  • Rockwool Safe'n'Sound mineral wool in the stud cavities, which is also noncombustible where the wall doubles as a garage separation.
  • Resilient channel or sound isolation clips to break the vibration path between the drywall and the studs.
  • Double layers of 5/8-inch drywall on the suite side, with joints staggered.
  • Acoustic sealant at the top plate, bottom plate, and every penetration.
  • Outlets and switches offset so they never share a stud bay across the wall.

The Connecting Door

A hollow-core door in a soundproofed wall is a hole in a bucket. We specify a solid-core interior door at the connecting opening, with perimeter weatherstripping and an automatic door bottom or sweep. It also blocks kitchen smells and light, which matters when one household is up at 6 a.m. and the other at 9.

Floor and Ceiling Paths

On a bonus room conversion, sound travels through the floor to the garage and the bedrooms next door. Mineral wool between the joists, resilient channel under the ceiling drywall below, and an underlayment beneath the finished floor keep footsteps and television sound from carrying.

Independent Climate Control

Privacy includes the thermostat. A ductless mini-split from Mitsubishi or Daikin gives the suite its own temperature control without tying into the main house ducts, which also removes a sound path. A Manual J calculation confirms the tonnage so the unit cycles properly in Gulf Coast humidity.

★★★★★Google Review

"We have worked with many contractors and this is the first company where work went smooth and there was no issues with the workmanship. Repaired everything the way it should be, no cutting corners."

Rachel B, Google review, May 2026

How It Works

How a Mother in Law Suite Addition Works With Wise Builders, Step by Step

A suite addition should come with a plan before it comes with a price. Every Wise Builders project starts with a free in-home design consultation, moves to a transparent fixed estimate, and only then to drawings, permits, and construction.

The same design-build process applies whether the suite is an attached addition in Semmes, a garage conversion in Daphne, or a VA grant project in Gulf Shores. Your project manager owns every step.

Our Eight-Step In-Law Suite Process

Eight steps take a family from the first conversation to the day a parent moves in. Here is what happens in each one.

The Wise Builders Roofing and Renovations mother-in-law suite process on the Gulf Coast, from free in-home design consultation and site evaluation through fixed estimate, engineered drawings, permitting with Build Mobile, Mobile County Inspection Services or Baldwin County Building Inspection, construction, and final walkthrough. The image reflects a dedicated project manager coordinating every trade for multigenerational families. A Wise Builders Roofing and Renovations project manager checking a Gulf Coast property line, setbacks and site conditions A printed Wise Builders Roofing and Renovations fixed estimate and written scope of work on a homeowner's table A Wise Builders Roofing and Renovations project manager holding approved permit paperwork and sealed drawings at a Gulf Coast jobsite A Wise Builders Roofing and Renovations project manager reviewing the approved permit and inspection schedule at a Gulf Coast jobsite A Wise Builders Roofing and Renovations home addition under construction in Baldwin County, Alabama New drywall hung and finished by Wise Builders Roofing and Renovations An accessible ground-floor remodel by Wise Builders Roofing and Renovations with a step-free layout
Step 1 of 8 · Free In-Home Design Consultation
1

Step 1. Free In-Home Design Consultation

We meet at your home, walk the house and the lot, and listen. Who is moving in, how do they get around today, and how might that change? We measure the existing floor elevation, look at where the suite could attach, and talk through attached addition versus conversion before anyone mentions a number.

2

Step 2. Site Evaluation: Flood Zone, Septic, Setbacks and HOA

Before a design is drawn we check four things that can change the project entirely. We confirm the FEMA flood zone and whether an Elevation Certificate exists. We confirm whether the home is on septic. We confirm setbacks and whether the lot sits in a zoned Baldwin planning district or a Mobile UDC district. And we ask for the HOA covenants.

3

Step 3. Transparent Fixed Estimate

You receive scope, materials, and schedule in writing, with one firm number and no hidden add-ons. If a VA grant is part of the funding, the scope is written so it lines up with what the grant covers.

4

Step 4. Design, Engineering and Selections

A residential designer or architect produces the code-compliant plan set both counties require and matches exterior materials so the suite preserves curb appeal.

A licensed structural engineer provides PE-stamped drawings for the roof tie-in and the wind load path. Sealed drawings are commonly required for any addition that alters roof structure or bearing walls.

5

Step 5. Permitting

Inside Mobile city limits we submit to the Build Mobile Permitting and Inspections Division, (251) 208-5895, through its online CSS portal, with Architectural Review Board approval first if the home is in a historic district.

Unincorporated Mobile County goes to Mobile County Inspection Services at 1110 Schillinger Rd N. That office needs code-compliant plans, a property diagram with setbacks, and our contractor license documentation, then takes 5 to 10 working days for plan review.

Baldwin County homes outside a city go to the Baldwin County Building Inspection Department, which adopted the 2024 IRC, IPC, IMC, 2018 IECC, and 2023 NEC effective March 5, 2025. Suites in Daphne, Fairhope, and Foley go through those cities' building departments and are inspected under the newer code editions.

6

Step 6. Foundation, Framing and Structural Tie-In

New footings are matched to the existing slab elevation and poured with the drain lines already in place. Framing ties into the existing structure with engineered connections, and the roof intersection gets a flashed valley or cricket so water never sits where old roof meets new.

7

Step 7. Rough-Ins, Inspections and Finishes

Plumbing, electrical, and HVAC rough-ins are inspected before the walls close. Grab bar blocking goes in now, along with the mineral wool and resilient channel on the shared wall. Your project manager schedules every inspection and sends you an update on every active work day.

8

Step 8. Final Walkthrough

We walk the finished suite with you and, when possible, with the person who will live in it. We check the ramp slope, the door clearances, the shower drain, and every punch list item, and we keep working until you sign off, backed by our 100% satisfaction guarantee.

Who Is on Your In-Law Suite Team

An in-law suite pulls in more professionals than a kitchen remodel does. Under a design-build contract they all report to your project manager, so you never coordinate them yourself.

RoleWhat They Do on Your SuiteWho Provides It
Dedicated project managerOwns scope, schedule, trades, inspections, and daily updatesWise Builders: Jim Brock, Graham Brock, Nathan Ivy, John Hagan, or William Fields
Residential designer or architectCode-compliant plan set, exterior matching, floor plan circulationCoordinated by Wise Builders
Licensed structural engineer (PE)Sealed drawings for footings, roof tie-in, and the 160 mph wind load pathCoordinated by Wise Builders
HVAC contractorManual J load calculation, mini-split sizing and installationWise Builders trade partner
Plumber and electricianSlab drain tie-in, dedicated water heater, 100-amp subpanel, medical equipment circuitsWise Builders trade partners
Mobile County Health DepartmentSeptic sign-off before any bedroom addition on a septic system, (251) 634-9801Coordinated by Wise Builders
VA SAH agentReviews the veteran's grant scope and releases funds at milestonesVA, with Wise Builders as grant contractor
★★★★★Google Review

"The contract was clear and all work was performed on schedule. A certificate of compliance was issued by a third party after inspection. It is refreshing to find a company like this."

Ronald Houle, Google review, March 2024

Gulf Coast Conditions

Building an In-Law Suite for Gulf Coast Conditions

A mother in law suite addition on the Gulf Coast is engineered for conditions an inland suite never sees: 160 mph design winds, a high water table, Formosan termites, flood zones, and humidity that runs above 70% most of the year. These are the site conditions that shape our design before we ever choose a tile.

Wind: 160 mph Ultimate Design Wind Speed

Mobile County's local amendments to the 2018 IRC set a 160 mph ultimate design wind speed for Risk Category II residential buildings. Framing, sheathing, connectors, and openings on the suite are engineered beyond inland norms.

Simpson Strong-Tie straps create a continuous load path from the new roof, through the walls, to the footings, and into the existing structure where the suite roof meets the house.

Impact-Rated Windows and Doors

The coast is a wind-borne debris region, so every window and exterior door on the suite is impact-rated. It is also a prerequisite for FORTIFIED Gold, which matters if the main house already carries a FORTIFIED designation.

Keeping a FORTIFIED Designation Valid

FORTIFIED Home, the IBHS standard, comes in Roof, Silver, and Gold levels, and each earns an Alabama insurance discount. An addition tied into a FORTIFIED home must be built to the same standard or the designation is no longer valid.

Because Wise Builders is also a FORTIFIED roofing contractor, we build the suite roof to match and coordinate the re-evaluation.

A Wise Builders Roofing and Renovations home addition under construction in Baldwin County, Alabama
Gulf Coast
01

Flood Zones and Slab Elevation

Mobile County requires a current Elevation Certificate or a Floodplain Administrator waiver for construction in a FEMA Special Flood Hazard Area. An addition in an SFHA may need to sit at or above Base Flood Elevation, which rules out a slab-level suite on some lots in Theodore, along Dauphin Island Parkway, and in Bayou La Batre.

When the required elevation is above the existing floor, the step-free connection gets harder. The options are raising the suite on piers with a ramp inside the connection, or building the suite where the lot sits higher. We settle this in Step 2, before design, because it can change the whole configuration.

02

Septic Systems and Bedroom Additions

A new bedroom raises the design flow of a septic system, so the Mobile County Health Department, (251) 634-9801, has to sign off before a permit is issued for any bedroom addition on septic. Baldwin County's health department has an equivalent review.

If the existing system is undersized, the field or tank may need expansion, and that goes into the fixed estimate up front.

03

Humidity and Formosan Termites

Coastal humidity gets into wall cavities, under slabs, and behind tile. Formosan subterranean termites, established across Mobile and Baldwin counties, will find any wood that stays damp. Both shape the suite's materials.

  • Closed-cell spray foam or properly detailed batt insulation with a vapor retarder on the warm side.
  • Treated bottom plates, termite shields at the slab edge, and a pre-treatment under the new slab.
  • Fiber cement siding and trim rather than wood where the addition meets grade.
  • A mini-split with a dedicated dehumidification mode, and a bath fan vented to the exterior on a humidity sensor.
  • Tile and luxury vinyl plank floors instead of carpet in the suite, which also helps a walker roll.
04

Historic Districts and HOAs

Homes in Mobile's historic districts need Architectural Review Board approval before Build Mobile will issue a permit, and the suite's exterior has to respect the district guidelines.

In Baldwin and West Mobile subdivisions, HOA covenants and Architectural Review Committee approval often restrict second entrances, exterior materials, and footprint. We read the covenants and submit to the ARC before we submit for the permit.

★★★★★Google Review

"Great people, great work and great experience. Great communication by William Fields. Work was done on schedule and exactly as stated. I will use these guys again!"

Mark Davidson, Google review, January 2026

Materials and Systems

Materials and Systems That Go Into an In-Law Suite

An in-law suite is a small house's worth of systems attached to yours. The choices below are the ones that decide whether the suite is comfortable, quiet, and safe for the next twenty years.

James Hardie fiber-cement siding installed by Wise Builders Roofing and Renovations on a Gulf Coast home
Siding
An active Wise Builders Roofing and Renovations project with the structure open for rough-ins and inspections
Insulation
New drywall hung and finished by Wise Builders Roofing and Renovations
Drywall
System or MaterialStandard OptionWise Builders Recommended OptionWhy We Recommend It
Heating and coolingExtend the main house ductworkDuctless mini-split (Mitsubishi or Daikin), sized by Manual JIndependent thermostat, no sound path through ducts, strong dehumidification
Water heaterShare the existing 40 or 50 gallon tankTankless (Rinnai or Navien) or dedicated tank for the suiteA second bath and kitchenette can outrun a single tank on a school morning
ElectricalAdd circuits to the existing panel100-amp subpanel, separately labeled under the 2017 or 2023 NECPowers the mini-split, water heater, kitchenette, and dedicated medical equipment circuits
Shared wall2x4 studs, fiberglass batts, single drywallRockwool Safe'n'Sound, resilient channel or isolation clips, double 5/8-inch drywallSTC 50+ so conversation does not carry
Connecting doorHollow-coreSolid-core with weatherstripping and sweepSound, light, and odor control
Windows and exterior doorsStandard double-paneImpact-rated, wind-borne debris region approvedRequired on the coast and a FORTIFIED Gold prerequisite
Roof connectionStandard nailingSimpson Strong-Tie straps, continuous load path, flashed valley or cricket160 mph wind design and a leak-free roof intersection
ShowerTiled shower with curbZero-threshold with linear drain, poured into the new slabRoll-in access, no trip lip
Bathroom wallsStandard framingSolid 2x grab bar blocking at shower, toilet, and tubBars anywhere, any time, without opening the wall
FloorsCarpet in the bedroomSlip-resistant tile or luxury vinyl plank, no transitionsFall prevention, easier for walkers and wheelchairs
KitchenetteFull range and kitchenSink, microwave, undercounter refrigerator, 34-inch counterKeeps the suite a single-family addition and keeps counters reachable
★★★★★Google Review

"Nathan was timely and very communicative. Definitely listens, understands and is the most helpful and knowledgeable for your needs or project."

Jacob Cox, Google review, March 2026

Cost

In-Law Suite Addition Cost: Company Ranges and National Benchmarks

In-law suite addition cost depends on configuration, size, and how much accessibility is built in. The Wise Builders ranges below come from our addition pricing of $125 to $250 per square foot, with projects from $34,000 to $170,000. National benchmarks follow, labeled as national, so you can see where the Gulf Coast sits.

What Wise Builders Charges for a Mother in Law Suite Addition

Project TierWise Builders RangeWhat It Usually Covers
Bonus room (FROG) conversion$25,000 to $60,000Full bath added, insulation and mini-split, solid-core door, egress window, finishes
Garage conversion in-law suite$25,000 to $60,000Slab and wall insulation, R302.6 separation, framed garage opening, bath, kitchenette, mini-split, step-free entry
Attached suite, mid-range$75,000 to $120,000400 to 550 sq ft, bedroom, accessible bath, sitting area, kitchenette, mini-split, subpanel, interior connection
Attached suite, full accessible$120,000 to $170,000550 to 700 sq ft, zero-threshold shower, roll-under vanity, 1:12 ramp and separate entrance, STC 50+ wall, tankless water heater, impact glazing, FORTIFIED-matched roof
Add-on: septic expansionPriced by health department reviewField or tank upgrade when the new bedroom raises design flow
Add-on: VA grant scopeOften $0 out of pocket up to grant capSAH, SHA, or HISA-funded accessibility items for an eligible veteran

Every range above becomes one fixed number in writing before any demolition, and that number only moves through a written change order you approve first.

National Benchmarks for Context

National SourceFigureHow It Compares
Angi 2026, in-law suite averageAbout $82,750Sits inside our mid-range attached suite tier
Angi 2026, in-law suite range$25,000 to $265,000Conversions at the low end, full-kitchen ADU-style suites at the top
Angi 2026, cost per sq ft$100 to $200Our $125 to $250 reflects coastal wind engineering and impact glazing
Angi 2026, garage conversion to in-law quarters$20,000 to $60,000Matches our garage conversion tier
Angi 2026, rough-in plumbing for a suiteAbout $6,500Included in our fixed estimate; higher when the tie-in is far from the sewer line
Zonda 2025 Cost vs. Value, midrange primary suite addition$170,517 cost, 32.3% recouped at resaleAn in-law suite is a comparable scope with a stronger everyday use case
Zonda 2025 Cost vs. Value, new ADU category$166,406 cost, 41.3% recoupedA suite with a separate entrance borrows some of that resale appeal

What Drives the Number Up or Down

The home additions page covers how we price every addition type, and the whole-house remodeling page shows what happens when a suite is part of a larger renovation.

  • Attached addition versus conversion: new footings, slab, roof, and exterior walls versus finishing space that already exists.
  • Distance from the bathroom to the sewer or septic tie-in.
  • Flood zone elevation requirements that push the suite onto piers.
  • Full accessible bath with zero-threshold shower versus a standard tiled shower.
  • Separate exterior entrance with covered landing and 1:12 ramp.
  • STC 50+ shared wall versus a standard insulated wall.
  • Matching an existing FORTIFIED roof and impact-rated openings.
  • Septic expansion and health department review.
★★★★★Google Review

"Jim Brock is the best project manager ever! He constantly communicated with me about the materials, build and timeline. No stones were unturned! Exceptional work by his team."

Marcus Mitchell, Google review, November 2023

Financing

Financing a Mother in Law Suite Addition, Including VA Grants

Financing for an in-law suite comes from three places: home equity, renovation mortgages that lend on the as-completed value, and, for eligible veterans, VA grants that can cover the accessible portion outright. Most families combine two of them.

Veterans: VA SAH, SHA and HISA Grants Through a Registered Grant Contractor

Wise Builders is a registered VA Specially Adapted Housing (SAH) and Special Housing Adaptation (SHA) grant contractor. That means a disabled veteran parent, spouse, or homeowner can have an accessible suite funded in part or in full by the VA.

Our team handles the grant scope, the VA agent's inspections, and the construction under one contract.

VA ProgramFY2026 CapWho QualifiesWhat It Can Fund in a Suite
SAH (38 U.S.C. 2101(a))$126,526Veterans and service members with qualifying severe service-connected disabilities, such as loss of use of both legsConstruction or adaptation of a suite: zero-threshold shower, 36-inch doors, ramps, roll-under vanity, lowered counters, widened halls
SHA (38 U.S.C. 2101(b))$25,349Veterans with qualifying disabilities such as blindness or loss of use of both handsAdaptations to a home the veteran or a family member owns and the veteran lives in
TRA (Temporary Residence Adaptation)$50,961 under SAH eligibility, $9,099 under SHA eligibilityEligible veterans temporarily living in a family member's homeAdapting the family member's home, which is exactly the in-law suite situation
HISA (Home Improvements and Structural Alterations)$6,800 lifetime for service-connected, or non-service-connected with a 50% rating; $2,000 otherwiseVeterans with a VA physician's prescription for medically necessary modificationsRamps, accessible bathroom, lowered sinks and counters, plumbing or electrical for medical equipment; stacks with SAH or SHA

The FY2026 SAH and SHA caps took effect October 1, 2025, and the VA adjusts them each fiscal year. Eligibility is decided by the VA, not by a contractor, so we help you gather the documentation and coordinate with your SAH agent, then build to the approved scope.

How a VA Grant Project Runs With Wise Builders

  • You or your veteran family member apply through VA Form 26-4555 or eBenefits and are assigned a SAH agent.
  • We meet at the home with the agent's requirements in hand and draw a suite scope that fits the grant and the medical need.
  • The VA reviews the plans and cost. Grant funds are released at milestones the agent inspects.
  • We build to the approved drawings and coordinate every VA inspection with your project manager.
  • HISA can cover prescribed items the SAH or SHA grant does not, and Strengthen Alabama Homes can cover the FORTIFIED roof on the main house.
★★★★★Google Review

"Wise Builders, a great business and even better people. They were a godsend, and I will be forever grateful."

Gregory Jenkins, Google review, December 2025

Why Wise Builders

Why Gulf Coast Families Choose Wise Builders as Their In-Law Suite Builder

An in law suite builder has to be a home addition contractor, an accessibility specialist, and a coordinator of designers, engineers, and health department reviews at the same time. Wise Builders was established in 2022 around a structure that makes that manageable for the homeowner: one person owns the job.

5.0
Average rating
160+
Google reviews
5-star
Facebook · Nextdoor · Trust Index

Three Promises We Make on Every In-Law Suite

01

One Point of Contact, Start to Finish

You get the same dedicated project manager from the first drawing to the final walkthrough. Experienced managers like Jim Brock, Graham Brock, Nathan Ivy, John Hagan, and William Fields handle the scheduling, the trades, the engineer, the health department, and the VA agent, so the answers come to you instead of you going after them.

02

One Fixed Price, In Writing

Your estimate is a firm number, locked before demolition begins. Project scope, materials, and schedule are settled in writing, and we collect a 50% deposit tied to that written scope with the balance following milestones you approve. If the walls reveal something unforeseen, the price only moves through a written change order you approve first.

03

One Firm Timeline, Set Up Front

You know your start date, your milestones, and your finish date on day one. The timeline builds in plan review, health department sign-off, and every inspection, and you get an update on every active work day. Then we run a comprehensive final walkthrough and keep working until you are satisfied.

The Credentials Behind Every In-Law Suite

Trust in an addition is earned with paperwork, not promises. Here is what stands behind the Wise Builders name on every suite.

CredentialWhat It Means for You
Licensed, Bonded & Insured GC (Alabama HBLB Lic. #28471)Required by the state for any residential project over $10,000, and both counties require proof on the permit application
BBB AccreditedVerified track record and formal complaint resolution
Atlas Pro CertifiedManufacturer-backed material and workmanship standards
VA SAH / SHA Grant ContractorRegistered to complete VA accessibility grant work for disabled veterans
FORTIFIED Roofing ContractorThe suite roof can be built to keep an existing FORTIFIED designation valid
Two Local OfficesTheodore headquarters and a Foley office, not a truck that leaves after storm season
5.0 Rating, 160+ ReviewsReal, verifiable proof across Google, Facebook, and Nextdoor
100% Satisfaction GuaranteeWe make it right before we call the job done

We do not hold NARI, NAHB CAPS, or CKBD credentials, and we will not tell you we do. We build to the aging-in-place and universal design guidelines those programs teach, and we put every spec in writing so you can check it against them.

★★★★★Google Review

"I highly recommend Wise Builders Roofing and Renovations for their extremely professional service from start to finish. If I could give six stars I would."

Casey Callister, Google review, December 2025

One point of contact. One fixed price. One firm timeline.

Call (251) 305-7282 for a free in-home design consultation.

Reviews

What Gulf Coast Families Say About Their Wise Builders Project

Wise Builders holds a 5.0 average rating across 160+ Google reviews, plus 5-star ratings on Facebook, Nextdoor, and Trust Index. The reviews are real, named, and verifiable, and several of them describe exactly the kind of accessibility and addition work an in-law suite involves.

5.0
Average rating
160+
Google reviews
5-star
Facebook · Nextdoor · Trust Index

Why These Reviews Matter for an In-Law Suite

A suite for a parent is a project where "done exactly how and when they said it would be" is the whole point. A move-in date is often tied to a lease ending, a house selling, or a hospital discharge. The same project managers named in these reviews run every suite we build.

Read the reviews yourself before you call. Then call (251) 305-7282 and talk to the team those homeowners are describing.

Two Offices

Two Offices, One Team: Serving Mobile County, Baldwin County and the Gulf Coast

Wise Builders builds mother-in-law suites from two offices, one on each side of Mobile Bay. The same project managers, the same fixed-price process, and the same VA grant experience apply whichever office is closer to you.

Mobile Location (Headquarters)

From Theodore we cover Mobile, Theodore, Tillmans Corner, Dawes, Irvington, St. Elmo, Semmes, Eight Mile, Prichard, Chickasaw, Saraland, Grand Bay, Coden, Satsuma, Creola, Wilmer, Axis, Mount Vernon, Citronelle, Bayou La Batre, and Dauphin Island.

We also serve the Mississippi Gulf Coast: Pascagoula, Ocean Springs, Biloxi, and Gulfport.

This office handles permits with Build Mobile and Mobile County Inspection Services, and the flood zone and septic reviews common on South Mobile County lots. Jim Brock, Graham Brock, Nathan Ivy, John Hagan, and William Fields all run projects from here.

Foley Location

From Foley we cover Foley, Gulf Shores, Orange Beach, Elberta, Summerdale, Robertsdale, Loxley, Silverhill, Magnolia Springs, Bon Secour, Fairhope, Point Clear, Daphne, Spanish Fort, Lillian, Perdido Beach, Josephine, Fort Morgan, Ono Island, and Seminole.

This office handles permits with the Baldwin County Building Inspection Department and the city departments in Daphne, Fairhope, Foley, and Gulf Shores, along with the HOA and ARC reviews common in Baldwin subdivisions. The same project managers and the same process apply.

FAQ

Frequently Asked Questions About Mother in Law Suite Additions

How much does a mother in law suite addition cost?

An attached in-law suite addition with Wise Builders typically runs $75,000 to $170,000, based on our addition pricing of $125 to $250 per square foot. A garage conversion or bonus room conversion runs $25,000 to $60,000.

Nationally, Angi puts the average in-law suite at about $82,750 with a range of $25,000 to $265,000. Your free in-home consultation produces one fixed number in writing.

How long does it take to build an in-law suite?

An attached suite follows our addition timeline of 2 to 5 months from permit to final walkthrough. A garage or bonus room conversion is usually faster. Plan review adds 5 to 10 working days at Mobile County Inspection Services, and health department septic review or HOA approval can add time up front, so we build those into your firm timeline.

Does an in-law suite need a full kitchen, and does that make it an ADU?

No, and it can. A kitchenette with a sink, microwave, and undercounter refrigerator keeps the suite classified as part of your single-family home. A full range and full kitchen usually reclassify it as a second dwelling unit under the Mobile UDC, which brings ADU size caps and zoning limits.

If you want a fully independent unit, see our ADU construction page.

Can I use a VA grant to build an accessible suite for a disabled veteran parent?

Often, yes. Wise Builders is a registered VA SAH and SHA grant contractor. For FY2026 the SAH grant is capped at $126,526 and the SHA grant at $25,349, and the TRA version of each grant is specifically for adapting a family member's home where the veteran lives.

The HISA grant adds up to $6,800 lifetime for prescribed items. The VA decides eligibility; we build to the approved scope.

Do I need a permit and a structural engineer for an in-law suite?

Yes to both in almost every case. Any addition needs a permit from Build Mobile, Mobile County Inspection Services, Baldwin County Building Inspection, or your city's building department.

A PE-stamped set of drawings is commonly required for an addition that ties into the roof or a bearing wall, and the 160 mph wind design on the coast makes that engineering worth having regardless.

What if my home is in a flood zone or on septic?

Both change the design, not the decision. In a FEMA Special Flood Hazard Area, Mobile County requires a current Elevation Certificate or a Floodplain Administrator waiver, and the suite may have to sit at or above Base Flood Elevation.

On septic, the Mobile County Health Department at (251) 634-9801 must sign off before a bedroom addition is permitted. We check both in Step 2, before you pay for design.

Will my HOA allow a separate entrance?

Sometimes. Many Baldwin and West Mobile subdivisions restrict second entrances, exterior materials, and footprint through their covenants and Architectural Review Committee.

We read the covenants and submit to the ARC before the permit application. When a second front-facing door is off the table, a side or rear entrance with a covered landing usually satisfies both the HOA and the family.

Can my parent stay in the house while the suite is built?

Yes. An attached addition is built outside the existing walls until the final connection, so the house stays livable. We use dust barriers, floor protection, daily cleanup, and phased sequencing on every occupied-home project, and we schedule the connecting-wall opening for a single planned day.

Is there help paying for a parent's in-home care once the suite is built?

Possibly. The Alabama Medicaid Elderly and Disabled Waiver funds in-home personal care and homemaker help for seniors who would otherwise qualify for nursing home care.

Eligibility is confirmed through the Alabama Department of Senior Services, not through a contractor, and this page is not benefits advice. Many families find the suite plus waiver services costs far less than assisted living.

Let's Talk First

Ready to Plan a Mother in Law Suite Addition? Let's Talk First

Your in-law suite starts with one free conversation and one honest, fixed estimate. There is nothing to pay and nothing to sign to find out what a suite for your parent, your veteran, or your adult child would really take.

Wise Builders Roofing and Renovations brings a dedicated project manager, VA SAH and SHA grant experience, and a 5.0 rating across 160+ reviews to every suite, addition, and home remodeling project on the Gulf Coast. If the plan grows into a new kitchen for the main house, the same team handles that too.

Call the Mobile office at (251) 305-7282 or the Foley office at (251) 270-5270, or request your free in-home design consultation below.

Wise Builders Roofing and Renovations, 6215 Rangeline Rd #105, Theodore, AL 36582 and 105 W Camphor Ave #100A, Foley, AL 36535, serving the Gulf Coast since 2022.

Schedule a free analysis today