Single-Story House Plans for Aging in Place
If you're planning to build a home you can live in for decades, not just a few years, the layout matters more than the finishes. Single-level living is one of the most requested features we hear about from owner-builders at Home Plan DIY, and it's not just older buyers asking for it. Parents thinking ahead, people with a bad knee, and anyone who's tired of hauling laundry up and down stairs all land on the same conclusion: a one-story home is easier to live in for the long haul.
This guide walks through what actually makes a plan "aging in place" friendly, what it adds (or doesn't add) to your build cost, and how to spot the difference between a plan that just happens to be one story and a plan that's genuinely designed for long-term, low-maintenance living.
Why single-level living matters more than square footage
A lot of buyers assume aging in place is mainly about square footage or a fancy accessible bathroom. In practice, it's mostly about eliminating friction. Every doorway you don't have to squeeze through, every step you don't have to climb, and every hallway wide enough for a walker or a moving cart makes daily life a little easier. That adds up over the 20, 30, or 40 years you might spend in a home.
Single-story house plans remove the biggest friction point of all: stairs. No daily climbing, no risk of a fall on the stairs, and no worrying about how you'll get a mattress, a wheelchair, or moving boxes to a second floor someday. That's why one-story plans are the natural starting point for anyone building with the long term in mind, whether that's you in 30 years or a parent moving in next year.
The features that actually make a plan age-friendly
Not every single-story plan is built the same way. Here's what to look for if long-term livability is a priority:
Wide doorways and hallways. Standard interior doors are often too narrow for a walker or wheelchair to pass through comfortably. Look for plans with hallways in the 42 to 48 inch range and door openings of at least 32 to 36 inches, especially at bathrooms and bedrooms.
Zero-step entries. A single step at the front or back door doesn't sound like much until it's the thing standing between you and getting inside safely. Plans with a covered entry at grade, or a garage that opens directly into the main living space without a step up, solve this without looking clinical.
A main-level primary suite. This one matters even in homes that aren't strictly single-story. If the primary bedroom and a full bathroom are both on the entry level, you can live comfortably downstairs even if a loft or bonus room upstairs is used only occasionally.
Curbless or low-threshold showers. A step-free, walk-in shower with a bench and grab bar blocking is far easier and cheaper to build in from the start than to retrofit later. You don't need to install grab bars on day one, but framing the walls to accept them later costs almost nothing extra.
Lever handles and rocker switches. Small hardware choices, but they matter for anyone with arthritis or limited grip strength. These are easy substitutions during a build and don't affect your floor plan at all.
Open, uncluttered traffic paths. A kitchen island that leaves at least 42 inches of clearance on each side, and a living area that doesn't force you to navigate around furniture pinch points, keeps the home functional as mobility changes.
Laundry on the main level. It sounds minor until you're the one carrying baskets. A main-floor laundry room, even a small one near the bedrooms, removes one more daily chore that gets harder with age.
What it costs to build this way
The good news is that most of these features don't require a bigger or more expensive home. Wider hallways, curbless showers, and zero-step entries are largely about how a plan is drawn, not how much material goes into it. What does affect your final number is total square footage and finish level, same as any build.
Using a typical build cost range of $130 to $220 per heated square foot for an owner-built home, a 1,400 square foot single-level plan lands somewhere between $182,000 and $308,000 depending on your region, labor market, and finish choices. A smaller 1,000 square foot plan would run roughly $130,000 to $220,000, while a more spacious 1,800 square foot layout would land between $234,000 and $396,000. The features that matter most for aging in place, like wide doorways and zero-step entries, typically add very little to that range because they're decisions made on paper, not extra materials in the ground.
Where costs can rise a bit is if you add true accessibility features like a roll-in shower with a linear drain, reinforced wall blocking throughout, or a wider garage for van access. Even then, you're usually looking at a few thousand dollars, not a redesign of the whole home.
Single-story vs. 1.5 story: a quick note
If you're weighing a true single-story plan against one with a loft, it's worth being clear about the difference. A home with a loft is a 1.5 story home, not a two story home, and it changes the aging-in-place math. A 1.5 story plan can still work well if the primary bedroom, bathroom, and laundry are all on the main floor and the loft is used only for guests, storage, or a hobby space you're happy to visit occasionally rather than daily. We cover this comparison in more detail in One Story vs 1.5 Story: Which to Build and Why, which is worth a read if you're not sure which layout fits your situation.
Planning ahead without overbuilding
You don't need to build a fully accessible home on day one to plan smart. A lot of owner-builders take a "design now, adapt later" approach: choose a single-level plan, make sure hallways and doorways are generous, frame bathroom walls to accept grab bars later, and leave the shower curbless from the start even if you don't need the safety features yet. This way the bones of the home support aging in place without spending money on features you may not need for years.
It's also worth thinking about where you might want a caregiver suite or a private guest space down the road. Some single-story plans include a secondary bedroom with its own bathroom near the entry, which works well as a guest room now and a caregiver or in-law space later without any renovation.
Plans built for single-level living
If this approach fits how you're planning to build, browse our Single-Story House Plans collection for layouts designed around one-level living. Two that come up often with buyers planning for the long term: this 2 bedroom, 2 bath single-story plan with wide open living space and a simple, efficient layout, and this 3 bedroom, 2 bath single-story farmhouse plan with a split bedroom layout that keeps the primary suite private from the secondary bedrooms.
Every plan you buy from Home Plan DIY comes as a PDF drawing set plus material list, so you can take it straight to your local building department or contractor. If you find a layout that's close but not quite right, our modification service can adjust doorway widths, hallway clearances, or bathroom layouts to fit your specific accessibility needs before you build.
Frequently asked questions
Do single-story homes cost more to build than two-story homes of the same square footage?
Generally yes, a bit. Single-story homes have more roof and foundation per square foot than a two-story home, which can add some cost. But the difference is usually modest, and many owner-builders find the long-term livability worth it.
What's the minimum hallway width for wheelchair access?
Most accessibility guidelines call for at least 36 inches for a hallway to be comfortably navigable, though 42 to 48 inches is more comfortable for a wheelchair or walker to turn in.
Can I add aging-in-place features to an existing plan?
Often, yes. Our modification service can widen doorways and hallways, adjust a bathroom layout for a curbless shower, or add blocking for grab bars in an existing plan design.
Is a single-story home always the best choice for aging in place?
It's the simplest and most reliable choice because it removes stairs entirely. A 1.5 story home can also work well if all the essential daily spaces, bedroom, bathroom, kitchen, and laundry, are on the main level.
Do I need to install grab bars and accessibility features during construction?
Not necessarily. Many owner-builders frame walls with blocking to support grab bars later and choose a curbless shower from the start, then add the visible accessibility features whenever they're actually needed.
