Most conversations about accessible home design start with a misunderstanding, so let’s clear it up first.
The Americans with Disabilities Act does not apply to your custom home. According to the U.S. Access Board, the ADA does not cover individually owned housing in the private sector, including single-family homes. The Fair Housing Act’s construction requirements cover multifamily buildings with four or more units, not detached houses. As the National Association of Home Builders puts it directly, the accessibility standards of the ADA, the Fair Housing Act, and most building codes do not apply to private single-family residences.
So there is no such thing as a legally required ADA-compliant home when you’re building for yourself.
That sounds like it makes the question moot. It does the opposite. It means every accessibility decision in your home is a design choice rather than a code obligation, which puts the responsibility on you and your builder to get it right. It gives you the freedom to apply the standards where they matter and ignore them where they don’t.
The ADA Standards remain the best dimensional reference available. They’re rigorously researched, widely understood, and they work. This guide uses them as the blueprint for a home that will serve you at 40 and at 80.
Builder Perspective
Clients rarely arrive asking for an accessible home. They arrive asking for a home they won’t have to leave. Those are the same request, but only one of them sounds like it involves grab bars, and that difference shapes the entire conversation.
What we’ve found is that almost nobody objects to the features themselves once they understand what they cost during framing versus after. The resistance isn’t to accessibility. It’s to the picture people carry of what an accessible house looks like.
Universal Design: The Framework Builders Actually Use
Professionals call this work universal design: an approach to designing environments to be usable by as many people as possible, regardless of age, ability, or situation, without requiring adaptation or specialized design.
The distinction matters because it changes what the finished house looks like. A home built to institutional accessibility specs reads as institutional. A home built with universal design principles simply reads as spacious, well-lit, and easy to move through. Wide hallways, a curbless shower, and a main-floor primary suite appeal to buyers of every age and ability; nobody walks in and thinks “accessibility features.” They think the house feels good.
That’s the standard worth holding: accessibility that’s indistinguishable from good design.
Why This Belongs in the Plan Now
The financial argument is straightforward, and it’s why this conversation belongs in design rather than a decade later.
AARP’s 2024 Home and Community Preferences Survey found that 75% of adults aged 50 and older want to remain in their current homes as they age, and 73% hope to stay in their communities. More than half (51%) say they need a home that supports independent aging, and 53% want housing with accessibility features.
Meanwhile, Harvard’s Joint Center for Housing Studies reports that homeowners 65 and older now account for 27% of all remodeling spending, nearly double their previous share. Much of that money goes to retrofitting houses that could have been built correctly the first time.
Here’s the part that should drive the decision: widening a doorway during framing costs almost nothing. Widening it after drywall, trim, flooring, and paint costs thousands. Adding blocking behind bathroom walls for future grab bars costs a few hundred dollars in lumber and labor during construction. Opening finished tile walls to add that blocking later costs many times more and never looks quite right.
You are not paying for accessibility today. You are buying the option to add it cheaply tomorrow.
Builder Perspective
The hardest calls we take come three or four years after move-in, when something has changed in a family and the fix means opening finished walls in a house somebody is living in. Almost every time, the same work would have been minor during framing.
That gap between a few hundred dollars in lumber and a demolition project is the entire argument for having this conversation at the design table. We would rather spend an hour on it during planning than have a client spend a month on it later.
Getting in the Door: Entries and Approach
An accessible house fails at the front door, or it never fails at all. Everything else depends on whether you can get inside.
A No-Step Entry
The single most valuable feature in the entire guide. At least one entrance — front door, garage, or rear — should have zero steps between the exterior surface and the finished floor. This is fundamentally a site and foundation decision, which is why it belongs in land planning rather than in a later change order. Grading the approach, setting the garage slab flush with the main floor, and managing drainage must all be coordinated before the foundation goes in.
Ramps and Slope
If a ramp is needed, the ADA maximum slope is 1:12; one inch of rise requires twelve inches of run. A 24-inch rise needs 24 feet of ramp plus landings. That’s a substantial piece of architecture, which is another argument for solving the problem with grading instead.
Landings and Thresholds
Provide a level landing at least 5 feet by 5 feet outside the door so someone using a wheelchair can maneuver while opening it. Keep thresholds to half an inch or less. Cover the entry. Managing an umbrella, keys, and a door at the same time is difficult for anyone, which is also why the daily entry deserves as much planning as the front door.
Door Hardware
Lever handles, not knobs — a detail worth settling alongside your interior doors and millwork. Levers can be operated with a closed fist, an elbow, or a full armload of groceries. This is the cheapest upgrade in the entire guide, and it benefits everyone in the house immediately.
Builder Perspective
When a client tells us accessibility matters, the entry is the first thing we solve and the one we spend the most time on. It is almost entirely a site and foundation problem, which means it has to be settled before anything gets poured.
Get the grade right and the rest of the house has an easy job. Get it wrong and you are looking at a ramp bolted onto a finished elevation, which costs more, is harder to detail well, and is the outcome nobody wanted.
Moving Through: Circulation and Clearances
Once inside, accessibility comes down to dimensions.
Doorways
The ADA requires a minimum clear width of 32 inches. In practice, a 36-inch door yields roughly 33 to 34 inches of clear width, which is why 36-inch doors became the standard for accessible design. Specify 36-inch doors on every primary path. Allow 18 inches of clear wall space on the latch side so someone can pull the door open from a seated position. Pocket doors eliminate the swing problem and are worth considering for bathrooms and closets.
Hallways
The minimum clear width is 36 inches. Forty-two to 48 inches is considerably better and allows comfortable turning. Wide halls don’t read as accommodation; they read as generous.
Turning Space
A standard wheelchair requires a 60-inch diameter turning circle. Provide that in the kitchen, in at least one full bathroom, and in the primary bedroom. Where 60 inches isn’t feasible, a T-shaped turnaround is an accepted alternative.
Open Plans Help
Fewer tight corridors and fewer sharp transitions between rooms mean more usable space for everyone. This is where accessible and contemporary design agree.
Everything Essential on One Level
If you take one structural principle from this guide, take this one: a full bathroom, the primary bedroom, the kitchen, and laundry should all be on the main floor.
A house that requires stairs for daily living stops working the moment stairs become difficult — temporarily after surgery, permanently after a fall. Main-floor living is the difference between adapting and moving.
For two-story homes, plan ahead. Stack closets vertically on each floor with at least 60 by 60 inches of clear space so a residential elevator or lift can be retrofitted into that shaft later. Until then, they’re closets. This is exactly the kind of decision that belongs in full-service home design, where structural planning and long-term flexibility are addressed together.
Builder Perspective
Moving the primary suite to the main floor is the single most common revision we suggest on a plan a client brings us. It almost never adds cost. It just has to happen while the plan is still on paper, because after that it is a different house.
The stacked-closet detail deserves the same attention. Framing two closets in alignment costs nothing extra during construction and preserves the option of an elevator for the rest of the building’s life. Skip it, and retrofitting a shaft means cutting through finished floors.
Bathrooms: The Highest-Stakes Room
More home injuries happen here than anywhere else, and bathrooms are the most expensive room to modify after the fact. Get this one right during construction.
- Curbless shower. No lip, no threshold, no step. Minimum 36 by 36 inches; a roll-in shower needs 36 by 60. A linear drain and a properly sloped floor keep water from escaping.
- Blocking for grab bars. Install solid wall backing around the toilet, tub, and shower, rated to support 250 to 300 pounds. This is framing work, which is why the timing matters. You don’t have to hang the bars now. You have to be able to hang them later without demolition.
- Clear floor space. A 60 by 60 inch turning area, with at least 30 by 48 inches of clear space at the toilet and sink. These areas may overlap.
- Comfort-height toilet, typically 17 to 19 inches to the seat, which is significantly easier to transfer onto and off of.
- Knee clearance under the sink, roughly 29 inches, with the flooring continued underneath so the space looks intentional rather than unfinished.
- Anti-scald valves and single-lever faucets throughout.
- A handheld showerhead on an adjustable slide bar with a six-foot hose, plus a fold-down bench.
- Slip-resistant flooring and rounded rather than sharp counter edges.
Builder Perspective
We treat grab-bar blocking as standard practice rather than an upgrade. It is a few hundred dollars in lumber and labor while the walls are open, and it commits you to nothing — no bars go up until someone wants them.
The curbless shower is where detailing separates builders. Getting water to stay where it belongs without a curb depends on the drain type, the slope, and the waterproofing under the tile. It is worth asking anyone you are considering how they handle it, because the failure shows up years later as a repair nobody wants to make.
Kitchens That Work Seated or Standing
- Vary the counter heights. Work surfaces between 28 and 42 inches accommodate seated users, standing users, and cooks of different heights. A single lowered prep zone is often enough.
- Open knee space beneath the primary sink and at one counter section — worth coordinating early with your cabinetry plan.
- Drawers instead of lower cabinets. Deep drawers bring contents out to you rather than requiring you to reach into a dark box at floor level. Nearly every client prefers this regardless of mobility.
- Storage below 54 inches. Aim for roughly half of all storage within comfortable reach.
- Front-mounted cooktop controls so nobody reaches across hot burners.
- Wall oven with a side-swing door and a microwave drawer rather than an over-range unit.
- Pull-out shelving in pantries and corner cabinets. If the plan includes a scullery or prep pantry, apply the same reach and clearance logic there.
The Small Details That Matter Most
These are inexpensive during construction and disproportionately valuable over time.
- Rocker light switches rather than toggles, mounted 42 to 48 inches above the floor
- Outlets raised to 18 inches, reducing bending for everyone
- Generous, layered lighting, particularly at stairs, hallways, and task areas; contrast sensitivity declines with age well before vision problems are diagnosed
- Color contrast between floors, walls, and cabinetry to define edges clearly
- Low-pile or hard flooring with minimal transitions between rooms; thick carpet and raised thresholds are both fall hazards and wheel obstacles
- Smart home controls for lighting, locks, thermostats, and doorbells, all operable by voice or phone — placement belongs in systems coordination, not at trim-out
- Lever hardware everywhere, including interior doors and cabinetry
Designing for Now, Adapting Later
The most sophisticated approach isn’t installing every feature on day one. It’s building a house that can change without renovation.
Grab bar blocking sits invisible inside the wall. Stacked closets become an elevator shaft when needed. A main-floor office with a nearby full bath converts to a bedroom, or to a guest suite. Wide halls and 36-inch doors simply feel good until the day they become necessary.
This is what adaptable planning means in practice: a home that fits your life now and is engineered to keep fitting it. It’s the same thinking behind designing a multigenerational home, where the house has to serve several ages and stages at once.
Building Accessible in the Triangle
Site selection carries more weight here than most buyers expect. Much of the Raleigh, Durham, and Chatham County landscape is rolling rather than flat, and a sloped lot makes a no-step entry substantially harder and more expensive to achieve.
If accessibility is a priority, raise it before you buy land. Selecting the homesite is the first accessibility decision you will make. Evaluating grade, drainage, and approach is part of land planning, and the right lot removes problems that no amount of clever design can fully solve later. For clients who already own property, a thorough site assessment during custom home building determines what’s achievable and what the approach will cost.
Builder Perspective
We have walked lots with clients where the accessibility conversation changed which parcel they bought. That is not the design process failing. That is the design process working early enough to matter.
A rolling lot in Chatham County can be beautiful and still make a no-step entry expensive enough to reshape the budget. Knowing that before closing is worth considerably more than any feature we could add to the house afterward.
Start the Conversation Early
Accessible home design isn’t a package you add to a floor plan. It’s a set of decisions about grade, structure, and dimension that get made early and are expensive to revisit.
If you’re planning a custom home in Wake, Durham, Orange, or Chatham County and want it to work for the long term, that’s a conversation worth having at the design table. Contact Speight Built to talk it through, or call (919) 889-5694.
Frequently Asked Questions About Accessible Home Design
Building a home that stays usable as needs change raises questions about cost, code, resale, and how early these decisions have to be made. These FAQs cover the ones that come up most often.
Does my custom home have to be ADA compliant?
No. The ADA applies to public accommodations and commercial facilities, not private single-family residences. The Fair Housing Act’s design requirements apply to multifamily buildings with four or more units. Building your home to ADA dimensions is entirely voluntary and often a very good idea.
What’s the difference between ADA home design and universal design?
ADA home design borrows dimensional standards written for public buildings. Universal design is a broader philosophy focused on usability for everyone, and it’s what most custom builders actually practice. Universal design incorporates ADA dimensions where they’re useful without producing a clinical result.
How much does accessible home design add to the cost?
When planned from the start, far less than most people expect. Wider doors and halls, lever hardware, and blocking in walls add marginal cost during framing. Retrofit pricing runs dramatically higher; aging-in-place remodels typically cost 10 to 25% more than comparable standard remodels, and that’s before the disruption of living through construction.
Do accessible features hurt resale value?
The opposite, generally. Main-floor primary suites, curbless showers, and wider hallways are design decisions that age well, appealing broadly to buyers of every age, and the pool of buyers specifically seeking accessible homes is growing as the population ages.
Can you add accessibility to a home already under construction?
Some of it. Blocking, door widths, and outlet heights can change while walls are open. Foundation-level decisions — no-step entry, floor elevations, elevator shafts — become difficult or impossible once the slab is poured. The earlier the conversation, the more options remain.
What if I don’t need these features yet?
Most clients don’t. That’s the argument for building them in now: the features either disappear into the design or improve daily life immediately, and the expensive structural groundwork is already done if your needs change.
Start Planning a Custom Home That Will Serve Your Family for Generations
Every thoughtful decision made before construction begins can shape how comfortably, beautifully, and efficiently your home supports everyday life for decades to come.
Building a luxury custom home is about more than creating a beautiful place to live today—it’s about investing in a home that continues adapting to your family’s needs as life changes. Through thoughtful architectural planning, intelligent space design, and quality craftsmanship, Speight Built creates homes throughout the Triangle that combine timeless beauty with lasting functionality, allowing homeowners to enjoy exceptional comfort without compromising style.
If you’re ready to begin designing a custom home that reflects your vision while providing lasting comfort, flexibility, and value, the Speight Built team is here to help. We’ll guide you through every phase of the journey—from the earliest planning conversations to the day you receive your keys—creating a home thoughtfully crafted for every chapter still ahead.
