Wheelchair Ramp Calculatorby AccessProof

Ramp guide

Do you need a permit for a wheelchair ramp?

A permanent ramp is usually a structure, so most places require a building permit and an inspection. Portable and threshold ramps usually do not. Here is how to tell which bucket your project is in, and the one phone call that settles it.

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The short answer

A permanent ramp is usually a structure, so most jurisdictions require a building permit and an inspection. Portable and threshold ramps that you place rather than build usually do not. Everything in between, including modular aluminum systems, depends on how the ramp is anchored, what it attaches to and what your local rules say.

That is why the honest answer to "do I need a permit" is almost always "check with your local building department." One phone call settles it, and this guide shows you what to ask and what the inspection will cover.

Why this is a local question

Building codes are adopted and enforced locally. There is no national ramp permit. The ADA is a federal civil rights law that applies to government facilities and businesses open to the public, and it is enforced separately from building codes; it is not what your local building department inspects on a home project. Private single-family homes are generally not covered by ADA Title III, unless part of the home is used as a business that clients visit.

For homes, the local residential code applies, often based on the International Residential Code (IRC). In the 2021 IRC, Section R311.8 covers ramps: a maximum 1:12 slope for the ramp serving the required egress door where site constraints allow, with landings at the top and bottom, and handrails on steeper ramps. States adopt the IRC with their own amendments, so the edition and details vary. Our requirements guide summarizes the values and carries the same warning: confirm your adopted edition.

So the practical question is not "does the ADA require a permit," it is "does my city or county treat this ramp as a structure?"

When a permit is usually required

  • Permanent construction. Ramps built with footings, posts and decking, or poured concrete, are fixed parts of the property. Expect a permit and at least one inspection.
  • Work on the main entry path. A ramp serving the required egress door is covered by the residential code, and anything that changes the main way in and out gets a close look during review.
  • Changes to what the ramp meets. Replacing steps, altering a porch or deck edge, or removing railings to meet the ramp are alterations in their own right, even if the ramp itself were exempt.
  • Site work that comes with the ramp. New footings, retaining and drainage changes around the foundation are part of the project, and some jurisdictions review them separately.

When a permit is usually not required

  • Portable and threshold ramps. These are placed, not built. You can lift them, store them and take them with you, which is why they usually fall outside the building permit process. Check local rules and any HOA covenant anyway. The comparison of portable, modular and permanent ramps covers where each type fits.
  • Removable modular systems. Modular aluminum ramps are often exempt when they simply rest on adjustable supports. But if the ramp is bolted down, attached to the house or becomes a permanent accessible route, expect the question to come up. Ask your building department before you order, and ask the supplier what they typically see locally.

One caution that applies either way: no permit does not mean no rules. If the ramp serves a business or a public facility as part of an accessible route, the ADA's ramp requirements can apply regardless of the permitting process. The ADA ramp requirements guide covers those numbers.

Your HOA is a second approval layer

Many homeowners associations require architectural review before exterior structures go up, and covenants can be stricter than the building code on placement, materials and appearance. Ask for the application and what they want to see, usually drawings with dimensions, materials and colors. Get the approval in writing before you build, and plan for both timelines. A building permit does not override HOA covenants; they are separate processes, and both can apply.

Approval requests tend to go faster when you attach a spec sheet with the measured rise and computed dimensions instead of proposed dimensions. The ADA ramp calculator prints exactly that.

What the inspection usually covers

If your project is permitted, the inspector checks it against the adopted code. For a residential ramp that usually means the geometry (slope, landings, handrails, edge protection) and the structure (footings, framing, fasteners, and how the ramp meets the ground and the door threshold). A ramp that fails inspection costs more than doing it right the first time: rebuilds, re-inspection fees and delays. Every run of the calculator ends with a printable spec sheet that gives the inspector the computed values and the code sections in one page.

What to ask your local building department

  1. Does a ramp with this rise, at this address, need a permit? Describe the project in one sentence.
  2. What do you need with the application: drawings, a spec sheet, a site plan, contractor details?
  3. Which inspections happen at which stage, and what do the fees cover?
  4. Which code edition and local amendments apply to ramps here?
  5. Is there anything else to watch for at this location, such as setbacks, easements or drainage?

Plan first, then call

Permission conversations go better with numbers. Measure the total rise (not the number of steps), run it through the ramp calculator, and bring the spec sheet. If you are budgeting the build, run the cost estimator and ask the department about permit and inspection fees while you have them on the phone. Our cost guide notes that fees vary by jurisdiction and that time is part of the budget.

And if a portable ramp covers your situation, read the portable vs modular vs permanent comparison first. It may save you the entire permit conversation.

Sources

All links checked October 14, 2026. This is general information, not legal or design advice. Permit rules and building codes are adopted locally and vary; confirm your project with your local building department.