A plain-English overview of the rules that govern commercial parking lot striping in Maryland — the federal ADA Standards, the Maryland Accessibility Code, the State Fire Prevention Code, and the county-level pieces property managers run into in Central MD.
Informational, not legal advice. This page summarizes commonly applied rules and best practices for parking lot striping in Maryland. It is not a substitute for guidance from a licensed code official, accessibility consultant, or attorney. Standards are revised periodically and local Authorities Having Jurisdiction (AHJs) can impose additional requirements. Always confirm specifics with your county fire marshal, building permits office, and an accessibility professional for the project at hand.
Striping a commercial parking lot in Maryland sits at the intersection of three sets of rules: the federal ADA Standards (accessibility), the Maryland Accessibility Code (which aligns Maryland with federal ADA and adds a state administrative layer), and the Maryland State Fire Prevention Code (fire lanes, curb painting, apparatus access). On top of that, your county fire marshal and permits/inspections office have authority over how those rules are applied on your specific property. The good news: for most retail, office, medical, HOA, and warehouse lots in Central Maryland, the rules are predictable once you know what to look for.
The foundation for accessible parking in every U.S. commercial lot is the 2010 ADA Standards for Accessible Design, enforced by the U.S. Department of Justice. Two sections do most of the work for parking lots: Section 208 (how many accessible spaces) and Section 502 (what those spaces look like).
ADA Table 208.2 sets the minimum number of accessible spaces by lot size. The count is calculated per parking facility, not across an entire site — so a campus with multiple separate lots is sized lot-by-lot.
| Total spaces in lot | Minimum accessible spaces |
|---|---|
| 1 – 25 | 1 |
| 26 – 50 | 2 |
| 51 – 75 | 3 |
| 76 – 100 | 4 |
| 101 – 150 | 5 |
| 151 – 200 | 6 |
| 201 – 300 | 7 |
| 301 – 400 | 8 |
| 401 – 500 | 9 |
| 501 – 1,000 | 2% of total |
| 1,001 and over | 20, plus 1 for each 100 (or fraction) over 1,000 |
And one rule that catches a lot of property managers off-guard: at least one in every six accessible spaces (or fraction of six) must be van-accessible. So a 50-space lot has 2 accessible stalls, and at least one of those must be van-accessible. A 400-space lot has 8 accessible stalls, and at least 2 must be van-accessible.
If you're re-striping an existing non-compliant lot, you generally can't preserve the old, non-compliant layout. The Department of Justice's ADA Compliance Brief: Restriping Parking Spaces is explicit: when a business or government entity re-stripes a parking lot, it must provide accessible spaces required by the 2010 ADA Standards, because re-striping is considered “readily achievable” barrier removal. Practically, a re-stripe is the moment to bring the count, dimensions, and signage current. Read our ADA stalls & stencils service page for how we handle this on real lots.
Maryland's accessibility rules are codified in the Maryland Accessibility Code, currently at COMAR 09.12.53 (recodified from the older COMAR 05.02.02 in 2019), administered by the Maryland Department of Labor's Building Codes Administration. For commercial property owners, the practical reality is that Maryland's code aligns with the 2010 federal ADA Standards: meet the ADA's dimensions and counts and you generally meet Maryland's accessibility floor.
Maryland's Transportation Article §21-1005 reserves accessible spaces for vehicles displaying valid disability plates or placards and authorizes enforcement on private commercial property as well as public lots. Penalties for parking violations in accessible spaces in Maryland commonly run from roughly $250 to $500 or more, depending on the county or municipality. For property owners, the practical takeaway is that correctly striped, correctly signed accessible spaces are what makes enforcement possible — faded markings undercut both compliance and the ability to keep the spaces clear.
Maryland's State Fire Marshal adopts the Maryland State Fire Prevention Code, which is built on the International Fire Code (IFC). The two IFC sections that drive parking-lot striping work are:
In Central Maryland, the convention most commonly required by county fire marshals is:
Beyond fire lanes, the markings your lot likely needs are guided by good practice and the local building/zoning code rather than a single Maryland-wide rulebook: directional arrows, stop bars at exits, crosswalks where pedestrians cross drive aisles, loading-zone striping, and reserved-space legends (EV, compact, visitor, reserved). On streets and public rights-of-way the FHWA Manual on Uniform Traffic Control Devices (MUTCD) applies; for private commercial lots it's a strong reference, but the AHJ governs.
Each county we serve has its own permits/inspections office for accessibility on new construction and major renovations, and its own fire marshal for fire lanes. We work with each of these offices regularly.
The Baltimore County ADA Office publishes parking-specific technical requirements aligned with the federal Standards, and the Baltimore County Fire Department — via the Fire Marshal's Office — sets fire-lane marking specs for properties in the county. Large multi-tenant retail and Hunt Valley/Owings Mills office parks are common review touchpoints.
The Department of Inspections, Licenses and Permits reviews accessibility on new/renovated commercial work, and the Howard County Department of Fire and Rescue Services handles fire-lane sign-off. Columbia village centers, Maple Lawn, and the US-1 / Jessup distribution corridor are common review areas.
The Carroll County Bureau of Permits & Inspections covers accessibility review, and the County's fire marshal (via the Department of Fire & Emergency Services) governs fire lane marking. Strip retail along Routes 140 and 26 plus church and school lots are the most common projects.
The Frederick County Division of Permits & Inspections reviews accessibility, and the County Fire Marshal's Office sets fire lane and access-road requirements. Growing retail in Urbana/Westview and distribution along the I-70/I-270 corridor make up much of the local commercial work.
If you're looking at your lot and trying to decide whether to call in a re-stripe, walk through this list.
If any of those answers gave you pause, that's the right time to get an on-site assessment. We do it for free as part of a striping quote, and bring up specific code items we see while we're walking the lot — before any paint hits the ground.
It depends on your lot's total stall count. Per ADA Table 208.2, a lot with 1–25 spaces needs at least 1 accessible stall; 26–50 needs 2; 51–75 needs 3; 76–100 needs 4, and the count steps up from there. At least one in every six accessible spaces (or fraction of six) must be van-accessible, so even the smallest lot needs at least one van-accessible space.
Maryland adopts the federal 2010 ADA Standards through the Maryland Accessibility Code (COMAR 09.12.53), administered by the Department of Labor's Building Codes Administration. Meeting current ADA dimensions and counts generally satisfies the Maryland accessibility floor; specific fire-marshal sign-off, local zoning stall counts, and curb color conventions vary by county and municipality.
Generally yes. The U.S. Department of Justice has stated that when a business re-stripes a lot, accessible spaces must comply with the 2010 ADA Standards, because re-striping is treated as “readily achievable” barrier removal. A re-stripe is the right moment to fix any accessible-space count or dimension issues.
Maryland adopts the International Fire Code (IFC §503.3), which requires fire lanes to be identified by approved signs or approved roadway/curb markings. The most common Maryland convention is red curb paint with white “FIRE LANE — NO PARKING” lettering, but the exact color, lettering, and intervals are determined by the local fire marshal (the Authority Having Jurisdiction). Always confirm the spec with your county fire marshal before painting.
A car-accessible space must be at least 96″ (8 ft) wide with an adjacent access aisle at least 60″ (5 ft) wide. A van-accessible space must be at least 132″ (11 ft) wide with a 60″ aisle, or 96″ wide with a 96″ (8 ft) aisle. Access aisles run the full length of the space, and the surface slope can't exceed 1:48 in any direction. Van spaces and their routes also require a 98″ (8′-2″) minimum vertical clearance.
Per IFC §503.2, fire apparatus access roads must have an unobstructed width of at least 20 feet and an unobstructed vertical clearance of 13 feet 6 inches (or greater as specified by the local fire marshal). Striping a clear fire lane and keeping it unobstructed is what keeps the property compliant and ready for emergency response.
Your local Authority Having Jurisdiction (AHJ) has the final word — typically the county fire marshal for fire lanes, the county permits and inspections office for accessibility on new construction or major renovation, and the municipal traffic engineer for any street-adjacent markings. We work with these offices regularly across Baltimore, Howard, Carroll, and Frederick Counties.
We’ll walk your Maryland lot and point out what’s current, what’s out of spec, and what a clean re-stripe would cost — free, no obligation.