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The 2010 ADA Standards for Accessible Design set minimum counts based on the total number of spaces in each parking facility:
| Total spaces in lot | Minimum accessible spaces |
|---|---|
| 1 to 25 | 1 |
| 26 to 50 | 2 |
| 51 to 75 | 3 |
| 76 to 100 | 4 |
| 101 to 150 | 5 |
| 151 to 200 | 6 |
| 201 to 300 | 7 |
| 301 to 400 | 8 |
| 401 to 500 | 9 |
| 501 to 1,000 | 2% of total spaces |
| 1,001 and over | 20, plus 1 per 100 spaces over 1,000 |
At least one in every six accessible spaces must be van accessible. Certain property types — notably outpatient medical facilities and rehabilitation facilities specializing in mobility impairments — are held to higher percentages than the table above.
The blue symbol painted in the stall is conventional and widely expected, and some jurisdictions require it, but the sign is what the federal standard specifies for identifying the space.
Texas properties are also subject to the Texas Accessibility Standards (TAS), administered by the Texas Department of Licensing and Regulation. TAS closely tracks the federal standards, but the state adds a review and inspection process: construction and alteration projects at or above the state threshold must be registered with TDLR and inspected by a Registered Accessibility Specialist.
Routine repainting of existing markings is generally maintenance rather than an alteration. Reconfiguring a lot, changing stall counts or relocating accessible spaces is more likely to be treated as an alteration, which is worth confirming before the work starts.
The figures above are a general summary of published federal standards, provided so you can have an informed conversation with a contractor. They are not legal advice, not a compliance determination, and not a substitute for review of your specific property. Requirements turn on details — when the lot was built, what work has been done since, the use of the building, and the jurisdiction. For a binding answer, consult a Registered Accessibility Specialist, an architect, or the authority having jurisdiction over your property.
Under the 2010 ADA Standards, a lot with 1 to 25 spaces needs 1 accessible space, 26 to 50 needs 2, and so on up the scale; lots of 501 to 1,000 spaces need 2% of the total. At least 1 in every 6 accessible spaces must be van accessible. Counts apply per parking facility, and some uses such as medical and rehabilitation facilities have higher requirements.
The access aisle is the striped area beside an accessible space that gives someone room to deploy a ramp or lift and get to the vehicle. Access aisles must be at least 60 inches wide. Two accessible spaces may share one aisle, and the aisle must connect to an accessible route to the building entrance.
Either a 132-inch-wide space with a 60-inch access aisle, or a 96-inch-wide space with a 96-inch access aisle. Van accessible spaces also need a sign identifying them as van accessible, and adequate vertical clearance along the route the van uses.
Not on its own. Paint addresses the markings, but compliance also involves the number and location of spaces, aisle widths, surface slope, signage height, and a connected accessible route. If any of those are wrong, restriping alone will not fix them — and slope in particular usually means pavement work, not paint.
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