Ask a room full of fifty-somethings where they plan to live at eighty, and most will point at their own front door. In AARP’s national housing survey, updated in November 2025, 75% of adults age 50 and over said they want to remain in their current home as long as possible, and 73% said the same about their community. If you are choosing a house plan right now, that finding should change how you read it. The buyer signing the construction contract is not the plan’s only client. The same rooms have to serve the person you will be in twenty or thirty years, and the cheapest moment to take care of that person is before the first footing is poured.
The features that make a home work for a lifetime are quiet, inexpensive, and nearly invisible when they are drawn in from the start. That is the promise of universal design, and buyers have noticed. In a 2026 AARP study on universal design, 68% of adults 50 and over called these features important, and 59% agreed they should be standard in newly built homes. What follows are the decisions best made while your future house is still lines on paper.
Why these choices belong on the plan, not the punch list
Almost any universal design feature can be added to an existing house. The real questions are what it costs and how much of the home must be torn open to do it. Among older adults who expected to modify their homes, an AARP survey from December 2024 found that 72% anticipated bathroom changes and 71% anticipated changes that make entry and movement through the home easier. Those are exactly the two categories that are hardest to retrofit, because they involve plumbing, framing, and grading. On paper, a wider hallway is a pencil stroke. A step-free entry is a grading note. A curbless shower is a recessed patch of subfloor. After drywall and tile, each of them becomes a renovation project with a five-figure invoice and weeks of dust.
Start at the entrance
One way into the house without a single step decides whether groceries, strollers, moving dollies, and someday a walker cross the threshold without help. On a new plan this rarely means a ramp. A designer can hold the finished floor close to grade on one side of the house, run a gently sloped walk to a covered porch, or route the step-free path through the garage. Because the solution is graded into the site rather than bolted on later, it reads as a pleasant approach to the front door, not as equipment. A ramp retrofitted onto a finished porch, by contrast, announces itself from the street.
Keep a complete life on one level
AARP’s introduction to universal design describes the heart of a lifetime home simply, step-free access plus a bedroom, kitchen, full bathroom, and laundry on a level you can reach without stairs. One-story house plans satisfy that test automatically, which is a big reason they dominate the forever-home category. A two-story plan can pass as well, provided the main level holds a true owner’s suite, a full bath, and the laundry, so the upstairs becomes optional territory rather than daily terrain. When you compare accessible floor plans, trace an ordinary day through the drawing, sleeping, bathing, cooking, and laundry, and confirm the entire loop closes without touching a stair.
Buy your clearances while they are free
In the same 2026 study, the universal design features older respondents valued most were wider doors and halls at 67% and nonslip floors at 64%, ahead of step-free showers at 57% and grab bars or handrails at 55%. It is worth pausing on the top answer, because it is pure geometry. Specifying 36-inch doors and generous hallways adds almost nothing to the cost of a new build and changes nothing about the style of the house. What it changes is every future task that involves width, moving a sofa, carrying a sleeping child, steadying a parent on your arm, or using a mobility device without scraping knuckles. Wide circulation never reads as clinical. It reads as a well-built house.
Design the bathroom for wet floors and changing knees
The bathroom is where universal design earns its keep, and where retrofits hurt the most. Two plan-stage moves cover most of the ground. First, draw the primary shower curbless, with the subfloor recessed so the bathroom floor runs level into the shower and water is managed by slope and a linear drain rather than a raised curb waiting to catch a toe. Second, ask the builder to install solid wood blocking inside the walls around the shower, tub, and toilet during framing. The blocking costs a few dollars in lumber and disappears behind tile, and it means the grab bars that 55% of AARP respondents called important can be added in an afternoon whenever they become useful, with no demolition and no guesswork about what the wall will hold.
Floors and light, the quiet safety systems
The stakes here are not hypothetical. The Centers for Disease Control and Prevention reports that more than 14 million Americans age 65 and over, about one in four, report a fall each year, and about 37% of those who fall report an injury that required treatment or restricted their activity. Two plan-stage choices push directly against those numbers. Flooring is the first, and it explains why 64% of older adults in the AARP study prized nonslip floors. Favor textured tile, matte finishes, and low-pile surfaces, and keep transitions between rooms flush rather than raised. Lighting is the second. Layered fixtures in halls and baths, switches at both ends of every corridor, and a few well-placed night-light outlets between the bedroom and bathroom cost little on a plan and quietly remove the conditions most falls need.
Leave room for help you hope never to need
The final decision is the hardest to picture at forty-five. Three quarters of older adults tell AARP they intend to remain in their homes, and for some of them, staying will eventually mean help moving in, a family member for a season or a professional caregiver on a schedule. A flex room with a closet and a full bath, placed near the owner’s suite rather than at the far end of the house, covers that possibility completely. In the meantime it earns its footprint as an office, a nursery, a guest room, or a hobby space. What matters is that the plumbing and the proximity exist on the plan, because those are the two things no amount of furniture rearranging can create later.
A short checklist for reading any plan
Before you commit to a design, walk the drawings with this list in hand.
- One step-free entrance, achieved by grading rather than a ramp
- A bedroom, kitchen, full bathroom, and laundry reachable without stairs
- 36-inch doors and wide hallways throughout the main level
- A curbless primary shower with blocking in the surrounding walls
- Slip-resistant flooring with flush transitions between rooms
- Layered lighting and switches at both ends of halls
- A flex room with a full bath near the owner’s suite
None of these will make a new home look institutional. Most are invisible, and the visible ones, a level entry, generous halls, a roomy shower, simply read as quality. That is the quiet advantage of universal design done on paper. The house works, for everyone, for decades.
Big Hills designs and builds homes across Western North Carolina, and our plan library includes single-level and main-level-living designs that put these ideas on paper from day one. Browse the collection at Big Hills House Plans and talk with our team about tailoring a plan for the decades ahead.
