The hardest part of a residential ramp project is usually not choosing the ramp. It is proving that the whole route can work before anyone drills a hole or orders a custom section.

A sketch that shows only “three steps, therefore one ramp” leaves out the places where real users get stuck: the car door, the turn onto the ramp, the top landing, the swing of the exterior door, the threshold, drainage, snow storage, handrail clearance, and the path inside the house. Good setup work turns those unknowns into measurements.

Before buying or building anything, answer these five questions:

  1. What is the total vertical rise from the lower finished surface to the entry surface?
  2. How much clear horizontal space is really available once landings and turns are included?
  3. Can a person pause at the top and operate the door without standing on a slope?
  4. Where will water, ice, leaves, and snow go after the ramp is installed?
  5. Which rules actually apply to this property, and which dimensions are merely useful reference points?

Those questions sound basic. They prevent most expensive surprises.

Question 1: what exactly are you measuring?

Start with finished surfaces, not stair count. Measure from the surface where a user will approach the ramp to the finished surface they need to reach. Include a raised threshold if it remains part of the route. If the lower area slopes, take measurements at the actual intended ramp start, not at the most convenient nearby point.

A simple field note should record:

Measurement Why it matters
Total rise Determines how much slope and horizontal run may be needed
Available straight run Shows whether a single run is even plausible
Width between fixed obstacles Prevents a design that fits on paper but collides with walls, rails or landscaping
Top landing depth and width Determines whether the user can stop and operate the door
Door width and swing Reveals conflicts between wheelchair position and the moving door
Threshold height/profile Identifies the last obstacle after the ramp
Cross-slope and drainage direction Predicts instability, puddles and icing
Parking-to-ramp distance Tests the route as a daily trip rather than an isolated object

The U.S. Access Board’s ADA Standards use a maximum running slope of 1:12 for ramps on accessible routes, and its ramp guide shows how slope, rise, landings, width, handrails and drainage interact. For a private residence, however, ADA dimensions should not be treated automatically as the governing residential code. Local building rules, the type of project, housing program requirements, and manufacturer instructions may control. Use the federal dimensions as a disciplined reference, then confirm the rules that actually apply.

A useful counterexample: suppose the entrance has a 24-inch rise. A rough 1:12 calculation suggests 24 feet of ramp run before allowing for landings. If the yard offers only 15 feet, buying a 15-foot ramp does not “solve” the geometry; it creates a steeper route. The right answer may be a switchback configuration, a different entrance, grading changes, or a platform lift—not a shorter version of the same idea.

Question 2: does the route fit after you add landings and turns?

Homeowners often measure the long rectangle where the ramp will sit and forget the flat spaces needed before, after, and sometimes between ramp runs.

Landings are not wasted square footage. They are where a user can recover, change direction, open a door, wait for another person, or stop without rolling backward. The Access Board guide requires level landings at the top and bottom of ramp runs under the ADA Standards and gives additional dimensions for changes in direction. Again, treat these as accessibility geometry rather than a blanket statement about every private home.

On a tight site, draw the route to scale. Include the door leaf at full swing. Draw a wheelchair-sized rectangle or the actual mobility device footprint at the top landing. Then ask whether the user can approach, stop, reach the handle, move out of the door’s path, and enter.

This catches a classic failure: a ramp terminates directly in front of an outward-swinging door. The ramp itself may be broad and gentle, yet the user has nowhere level to wait while the door occupies the same space. The project “meets the ramp dimension” but fails the task.

AARP HomeFit makes a practical point that saves many difficult sites: the accessible entrance does not have to be the front door. A side, rear, or garage entry may offer a better zero-step or ramped route. Measure all realistic entrances before committing to the ceremonial one.

Question 3: can the user operate the entrance at the top?

At the top of the route, stop thinking like a builder for a moment and act out the sequence.

A person arrives with one hand on a cane, walker, wheelchair rim, scooter control, or railing. They may also carry keys, a phone, groceries, or a bag. If the door is heavy, if the lock requires two hands, or if the landing leaves no room to move sideways, the final two feet can be harder than the entire ramp.

Test:

  • where the mobility device stops;
  • whether the handle can be reached without leaning dangerously;
  • whether the door swings toward the user;
  • whether a storm or screen door creates a second conflict;
  • whether the threshold catches small front casters;
  • whether there is enough light to see the lock and edge of the landing;
  • whether a package or grocery bag can be set down without blocking the path.

Do this test in both directions. Exiting the home can expose a different problem from entering it.

Automatic or low-force door hardware can help in some homes, but do not treat hardware as a substitute for space. A power operator cannot create a missing landing.

Question 4: what happens in rain, ice and daily maintenance?

A dry-day installation photo hides the hardest conditions.

Water should not collect at landings or thresholds. The Access Board ramp guide specifically addresses wet conditions and drainage for ramps covered by the ADA Standards. In a residential project, the same practical lesson applies even when the legal rule is different: design the water path before construction, not after the first storm.

Look for:

  • downspouts that discharge toward the route;
  • roof edges that dump water onto a landing;
  • low spots between the ramp and house;
  • surfaces that become slick with algae or leaf litter;
  • snow-pile locations that would narrow the route;
  • gaps where small wheels or cane tips can catch;
  • fasteners and joints that will need periodic inspection.

Material choice changes the maintenance plan. Wood can provide a warm residential appearance but needs attention to moisture, surface condition and fasteners. Metal systems can be modular and predictable but may need anti-slip treatment, drainage planning and inspection of connections. Concrete can be durable but difficult to change if the household’s needs or entry layout changes.

The useful question is not “which material lasts longest?” It is “which system will this household realistically inspect and maintain in this climate?”

Question 5: what must be confirmed before installation day?

Separate design references from project requirements.

Before work begins, confirm the local permit or building-code path if applicable, homeowner-association or landlord constraints, utility conflicts, property lines, and the installation instructions for any manufactured system. If the project is funded through a housing, disability, insurance, veterans, or public program, that program may add its own requirements.

For a manufactured ramp, verify the manufacturer’s allowed slope/rise combinations, load limits, anchoring or support conditions, required edge protection, handrail configuration, and surface treatment. Do not mix components merely because they physically fit together.

For site-built work, confirm who is responsible for structural design, footings, attachment to the house, drainage, guard/handrail details and inspections. “The contractor said it should be fine” is not the same thing as a documented design decision.

A pre-installation handoff sheet

One page is enough:

  • measured rise;
  • proposed route and entrance;
  • scaled plan with run lengths and landings;
  • door swing and clear maneuvering zone;
  • threshold detail;
  • surface and drainage plan;
  • handrail/edge-protection approach;
  • lighting;
  • product model or construction specification;
  • local permit/code confirmation;
  • installer responsibility;
  • final user walk-through date.

Give the same sheet to the household and installer. If either side sees a different project, fix that disagreement before materials arrive.

The installation-day test is not “does it look level?”

After installation, test the route as a sequence. Start at the real parking or sidewalk point. Use the actual mobility device if the user is comfortable doing so. Check the route empty, then with the door moving, then while carrying a small item. Test at night. If weather permits, inspect after rain.

Look for rolling drift on landings, abrupt transitions, loose rails, wobble, sharp edges, fastener heads, drainage, door conflict and places where the usable width is narrower than the nominal width.

If the household needs assistance to use the route, write down exactly where and why. That may be acceptable for a temporary situation, but it should not be hidden behind the phrase “accessible entrance.”

The best setup is rarely the most complicated one. It is the route that has enough space, predictable surfaces, a workable door interaction, manageable maintenance and a clear rule set. Measure first, simulate the trip, document the decisions, and only then turn the sketch into hardware.

This guide is for planning and comparison, not a substitute for local building-code review, engineering advice, occupational therapy assessment, or a manufacturer’s installation instructions. Conditions vary by property and user.

Make a cheap full-size mock-up before the expensive build

When the site is tight, a tape measure can still hide a bad interaction. Mark the proposed ramp edges and landing corners on the ground with chalk, cones or painter’s tape. Mark the door swing. Put a chair or cardboard rectangle where the mobility device would stop. If a switchback is proposed, walk the turn rather than admiring it on a scale drawing.

For a temporary planning exercise, boards or tape can represent handrail lines so you can see how much clear space disappears once rails and posts exist. Do not create an unsafe makeshift ramp for live use; the point is to mock up the footprint.

Ask the primary user to participate if practical and comfortable. Designers often optimize for geometric compliance while missing reach, fatigue, fear of edges, preferred turning direction, or the difficulty of carrying items. A five-minute mock-up can reveal that the “technically efficient” entrance is not the entrance the household will choose.

Photograph the marked layout from both ends and attach those images to the handoff sheet. They become a useful record if the installer later proposes moving a landing, changing the door interaction or narrowing a section to avoid an obstacle.

Sources & Further Reading

Related Reading