ADA Parking & Curb Ramp Cost Calculator

With the defaults, a 60-stall lot that needs 3 accessible spaces (2 car and 1 van), 2 new curb ramps, 2 detectable warning panels and signs comes to $7,350. The two ramps are the largest line at $5,000, then $870 for three accessible signs on posts, $700 for the panels, $500 of mobilization, $245 of stall markings ($150 for the car spaces and $95 for the van space) and $35 for the VAN ACCESSIBLE plaque. Rebuilding existing ramps instead of cutting new ones takes the default to $4,750, and leaving the signs out takes it to $6,445.

Lot size changes the price through the number of accessible spaces. With everything else at the default, a 20-stall lot needs 1 accessible space, which must be a van space, and comes to $6,620. A 100-stall lot needs 4 and comes to $7,715, 150 stalls need 5 and cost $8,080, 300 stalls need 7 (two of them van spaces) and cost $8,865, and 500 stalls need 9 and cost $9,595. Past 500 stalls the count is 2 percent of the total, rounded up, so 501 stalls need 11 spaces and cost $10,325, and 1,000 stalls need 20 spaces and cost $13,720. A separate route ramp is the biggest optional add: a 12 ft concrete ramp with handrails adds $5,400, which takes the default to $12,750.

For a public benchmark, the City of Grand Island, Nebraska, reports in a December 2021 memo that its annual curb ramp program built 1,122 curb ramps for $1,813,384, an average of $1,915 per ramp, and that the 4,612 ramps it still needs would cost $8,832,000 at present-day prices. Those are sidewalk ramps built in bulk by a city. A single ramp on a private lot has no volume discount and carries its own mobilization, which is why the calculator's new-ramp default is $2,500, about 30 percent higher. Treat all unit prices as starting points and replace them with a contractor quote.

ADA.gov says the number of accessible spaces is worked out separately for each parking facility, not from the total on a site. The calculator's automatic count uses the same 2010 table: 1 space for a lot of 1 to 25, 2 for 26 to 50, 3 for 51 to 75, 4 for 76 to 100, 5 for 101 to 150, 6 for 151 to 200, 7 for 201 to 300, 8 for 301 to 400 and 9 for 401 to 500, then 2 percent of the total for 501 to 1,000 and 20 plus 1 for each 100 over 1,000. Hospital outpatient, rehabilitation and residential facilities have different rules, so enter your own count when the automatic one does not apply.

At least one of every six accessible spaces, or fraction of six, must be van accessible, and always at least one. The calculator rounds up the same way: 1 to 6 accessible spaces need 1 van space, 7 to 12 need 2 and 13 to 18 need 3. A car space is at least 96 inches wide with a 60-inch access aisle. A van space is either 132 inches wide with a 60-inch aisle or 96 inches wide with a 96-inch aisle, and needs 98 inches of vertical clearance.

Each accessible space needs a sign with the international symbol of accessibility mounted at least 60 inches above the ground, measured to the bottom of the sign, and a van space needs a second sign saying it is van accessible. Where a site has four or fewer spaces in total, the accessible space does not need an identifying sign. ADA.gov notes that state or local laws may address the color and manner of marking the spaces and aisles, and the calculator prices the markings as a stencil plus aisle hatching, not as a specific pattern.

The Access Board's guide to the standards says ramps and curb ramps are required along accessible routes wherever the change in level is greater than half an inch. The running slope can be no steeper than 1:12 and the cross slope no steeper than 1:48. A curb ramp needs a landing at the top, 36 inches deep for a built-up ramp, and a built-up curb ramp cannot project into parking spaces, access aisles or vehicle traffic lanes. ADA.gov adds that ramps must not extend into an access aisle and that an accessible route is at least 3 feet wide with a firm, stable, slip-resistant surface.

A separate route ramp is more involved. The Access Board's guide says ramp runs need a clear width of at least 36 inches, level landings at the top and bottom of each run, a rise of no more than 30 inches per run, and handrails on both sides of any ramp with a rise greater than 6 inches. The calculator's route ramp is a rough allowance of $450 per foot for a concrete ramp with handrails. Get a site-specific design before you trust it.

Detectable warnings need more care. According to the Access Board's guide, the 2010 Standards require them on curb ramps only at transit facilities covered by the Department of Transportation's standards. They are not required at non-transit facilities subject to the Department of Justice's standards, and the guide says the Standards apply primarily to facilities located on sites. The same guide says DOT requires detectable warnings on curb ramps in projects funded by the Federal Highway Administration, and that the Board's public right-of-way guidelines address them along public streets and sidewalks. Local codes and project specifications often ask for them anyway, so the calculator keeps the panel count as its own input: set it to 0 if your project does not need panels, or to one per ramp plus any flush crossings if it does.

ADA.gov states that when a business or a state or local government restripes a parking lot, it must provide accessible spaces under the 2010 Standards, and that businesses also have a continuing duty to remove barriers in existing parking where that is readily achievable. A restripe is therefore the cheapest moment to fix a lot. In the EstiCube striping calculator, a 50-stall restripe with no arrows, stop bars, fire lane or crosswalks and with 2 accessible spaces is $1,181 and with 3 is $1,233, so each extra accessible space adds about $52.

The same space costs more as its own job in this calculator. A standalone job to add one van space, with its sign and plaque, comes to $920: $95 for the markings, $290 for the sign, $35 for the plaque and $500 of mobilization. Each extra car space adds $75 of markings and $290 for a sign on a post, which is $365, and each extra van space adds $420. Three accessible spaces with signs and no ramps or panels come to $1,650. Most of the gap is the sign. The striping calculator does not include signs, so its $52 covers only paint and stencil, while a standalone space adds $75 of markings, about $23 more, and $290 for a sign on a post. Mobilization ($500) is charged once per job, and the $750 minimum is a floor that sets the price only when a job adds up to less. Neither changes the cost of each added space.

Because the work is cheaper when it is combined, many owners add the ramps, the signs and the accessible spaces to the next restripe. Check the lot against the 2010 table first, and confirm with an ADA specialist or your local code office, since state and local rules can add to the federal ones. This is general information, not legal advice.