ADA Parking Lot Striping
In North Denver, CO

ADA Parking Lot Striping in North Denver, CO

ADA-compliant striping means every accessible parking space, access aisle, and sign on your lot meets the 2010 ADA Standards for Accessible Design and matches the technical specifications in ICC A117.1, the model code most Colorado jurisdictions reference for accessible route and parking design. Compliance covers three things at once: the physical count of accessible spaces required for your lot size, the dimensions of each space and its adjoining access aisle, and the signage that marks the space as reserved and identifies which stalls are van-accessible.

Non-compliant striping creates two separate problems for a property owner. First, it’s an accessibility barrier — faded, missing, or undersized striping and signage make it harder or impossible for a person using a wheelchair or other mobility device to safely park and reach the building. Second, it’s a liability exposure. ADA parking complaints and demand letters are a common enforcement path, and correcting a violation after a complaint is far more disruptive than fixing it proactively. Getting a professional layout done once — sized correctly for your total space count, positioned on the shortest accessible route to your entrance — is the most direct way to remove that risk.

Compliance isn’t a one-time event tied only to new construction. Under the 2010 ADA Standards, an existing lot that gets resurfaced or restriped is treated as an alteration and needs to be brought up to current accessible parking requirements to the maximum extent feasible — which makes a restriping project the natural point to correct an outdated layout, not just repaint the lines that are already there. That timing matters in North Denver: high-altitude sun and Colorado’s freeze-thaw winters fade paint and crack pavement faster than in milder climates, so accessible striping and hatching are often among the first markings to become unreadable, well before the rest of the lot needs attention.

We handle ADA striping for parking lots across North Denver, from single-tenant retail lots to multi-building commercial properties, sizing every layout to the current space count and confirming aisle widths and signage heights match code before we leave the site.

ADA Accessible Stall Requirements

The number of accessible spaces a lot must provide is set by the total number of parking spaces on the lot, per 2010 ADA §208.2:

Total parking spaces in lot	Minimum required 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
1,001 and over	20, plus 1 per 100 over 1,000

At least 1 in every 6 accessible spaces — with a minimum of 1 — must be van-accessible, regardless of how small the total accessible count is. Every accessible space, standard or van, must be at least 96 inches wide, measured to the centerline of its stripe. That width isn’t arbitrary — it’s the room a wheelchair user needs to transfer from the vehicle or deploy a ramp or lift beside it. Each space needs an adjoining access aisle: a minimum of 60 inches wide for a standard accessible space, or 96 inches wide for a van-accessible space. Access aisles must be marked with painted striping — typically diagonal hatching — and must connect directly to an accessible route that leads to the building entrance, without crossing behind parked vehicles or through a vehicular travel lane where avoidable.

Accessible spaces also need to be located on the shortest accessible route to an accessible building entrance, which usually means placing them near the front of the lot rather than scattering them wherever pavement happens to be open. Where a lot serves more than one building or has more than one accessible entrance, spaces should be distributed so each entrance has its own compliant count nearby, not a single cluster serving the whole property.

Van-Accessible Spaces & Access Aisles

Van-accessible spaces exist because full-size vans equipped with wheelchair lifts need more room to deploy a ramp or lift beside the vehicle than a standard passenger car does. The 1-in-6 rule means a lot with only 1 or 2 accessible spaces still needs at least one van-accessible space — there’s no threshold below which the requirement disappears. The count scales in whole increments: a lot that requires 4 accessible spaces still needs only 1 van-accessible space (4 divided by 6 rounds up to 1), while a lot that requires 7 to 12 accessible spaces needs 2 van-accessible spaces. We run that math against your lot’s actual required count before laying out a single stripe.

The defining difference is aisle width: a van-accessible space pairs with a 96-inch aisle instead of the 60-inch aisle used for a standard accessible space. That aisle can sit on either side of the van space, and two van spaces are permitted to share a single 96-inch aisle between them. Van-accessible spaces also require a “van accessible” designation on the space’s post-mounted sign, in addition to the standard International Symbol of Accessibility.

Surface condition matters as much as layout. Both the accessible space and its access aisle must sit on a surface with a running slope and cross slope no steeper than 1:48 in any direction — a flatter tolerance than the rest of the lot is held to. On lots that have settled or heaved from Colorado’s freeze-thaw cycles, that slope requirement is often the first thing to fail, even when the striping layout itself is still legible.

Our ADA Striping Process

1. Audit the existing lot against current standards. We measure total space count, existing accessible space count and dimensions, aisle widths, surface slope, and signage — comparing what’s on the ground now to what the 2010 ADA Standards and ICC A117.1 require.
2. Calculate required counts and locations. Using the §208.2 table, we confirm exactly how many accessible and van-accessible spaces the lot needs, then place them on the shortest accessible route to the main entrance — not simply wherever space allows.
3. Mark stalls, aisles, and ISA symbols. We stripe each accessible space at full width, paint the adjoining access aisle with hatching, and apply the International Symbol of Accessibility to the pavement in the correct position for each space.
4. Install and verify signage at required height. Post-mounted signs, including “van accessible” plaques where required, are set at the mounting height specified in ICC A117.1 so they’re visible from a vehicle approaching the space.
5. Compliance walkthrough. Before we leave, we walk the finished layout against the same checklist used in step one, confirming stripe placement, aisle width, symbol position, and signage all match the standard.