Braillito Maps · Accessibility guides
ADA hallway width: 36 inches clear, and the rest of an accessible corridor
Under the 2010 ADA Standards, a hallway or corridor that is part of an accessible route has at least 36 inches (915 mm) of clear width (2010 ADA Standards, 403.5.1). That is the number most people look up, but a corridor can meet it and still stop a wheelchair: section 403 also sets where the hallway may narrow to 32 inches, how wide it has to be where it doubles back, how often two people need room to pass, and how steep the floor may be, and section 307 limits what may stick out from the walls (2010 ADA Standards, 403.3, 403.5 and 307). These are the measurements, each with its section, and how to check a hallway with a tape measure.
This is a summary. The official 2010 ADA Standards for Accessible Design are the reference.
Clear width: 36 inches, and where 32 is allowed
The clear width of a walking surface on an accessible route is 36 inches (915 mm) minimum (2010 ADA Standards, 403.5.1). Clear width is the space left to pass, not the distance from wall to wall. A hallway 48 inches wide with a built-in bench or a fixed display case along one wall can end up narrower than 36 inches (2010 ADA Standards, 403.5.1), and wall-mounted objects count too: protruding objects may not reduce the clear width required for accessible routes (2010 ADA Standards, 307.5).
There is one exception. The clear width may drop to 32 inches (815 mm) for a length of 24 inches (610 mm) at most, provided the narrow segments are separated by segments at least 48 inches (1220 mm) long and 36 inches (915 mm) wide (2010 ADA Standards, 403.5.1, exception). That covers a short pinch point, for example where a column or the end of a counter juts into the hallway. It does not make a 32-inch corridor acceptable: a long stretch at 32 inches breaks the 24-inch limit.
The 32 and 24 inches are the same numbers as at a door. A doorway has at least 32 inches of clear width, and an opening more than 24 inches deep needs 36 inches (2010 ADA Standards, 404.2.3). So a door can be 32 inches wide and still fit a 36-inch hallway; how the door opening is measured, and the space needed on each side of it, is in ADA door width.
Which hallways and corridors the rule covers
The Standards call any interior or exterior way of passage for people on foot a circulation path, and the definition names hallways, along with walks, ramps, stairways, elevators and landings (2010 ADA Standards, 106.5, “circulation path”). An accessible route is made of walking surfaces with a running slope not steeper than 1:20, doorways, ramps, curb ramps, elevators and platform lifts (2010 ADA Standards, 402.2), and the walking surfaces that are part of an accessible route follow section 403 (2010 ADA Standards, 403.1). Section 206 decides where those routes go:
- Inside the building: at least one accessible route connects the accessible entrances with all accessible spaces and elements that are otherwise connected by a circulation path, with a few listed exceptions (2010 ADA Standards, 206.2.4). The advisory note gives raised areas and speaker platforms as examples of what it has to reach (2010 ADA Standards, advisory 206.2.4).
- In the same place as everyone else: accessible routes coincide with or are located in the same area as the general circulation paths, and where those paths are interior, the accessible route is interior too (2010 ADA Standards, 206.3). The advisory note adds that accessible vertical circulation has to be in the same area as the stairs and escalators, not isolated at the back of the building (2010 ADA Standards, advisory 206.3).
- Staff areas: common use circulation paths within employee work areas comply with section 402, with three exceptions: work areas under 1,000 square feet (93 m²) defined by permanently installed partitions, counters, casework or furnishings; paths that are an integral component of work area equipment; and exterior work areas fully exposed to the weather (2010 ADA Standards, 206.2.8 and its exceptions). Inside a work area, work equipment may reduce those clearances where the reduction is essential to the work being done (2010 ADA Standards, 403.5, exception). Corridors themselves are not employee work areas, and neither are toilet rooms, kitchenettes or break rooms (2010 ADA Standards, 106.5, “employee work area”).
Outdoors, the same section 403 applies to walks on a site, a walk being an exterior prepared surface for pedestrian use (2010 ADA Standards, 106.5, “walk”). Those walks, and the public sidewalks that follow other guidelines, are explained in ADA sidewalk requirements. This page is about the hallway inside.
Width at a turn: 42, 48 and 42 inches
Where the accessible route makes a 180-degree turn around an element less than 48 inches (1220 mm) wide, the clear width is at least 42 inches (1065 mm) approaching the turn, 48 inches (1220 mm) at the turn and 42 inches (1065 mm) leaving it. If the clear width at the turn is 60 inches (1525 mm) or more, that rule does not apply (2010 ADA Standards, 403.5.2 and its exception).
The extra width is for one case only: a 180-degree turn around something narrower than 48 inches, such as the end of a short partition or a bank of lockers in the middle of a hallway. The Standards give no other turn width, so everywhere else, a 90-degree corner included, the 36 inches of section 403.5.1 is the minimum (2010 ADA Standards, 403.5.1).
A turn in a hallway is not the same thing as a turning space, the 60-inch (1525 mm) circle or T-shaped space that lets a wheelchair turn all the way around (2010 ADA Standards, 304.3). Where the Standards require a turning space, how it is measured and the T-shape are in ADA turning space.
Passing spaces every 200 feet
An accessible route with a clear width of less than 60 inches (1525 mm) has passing spaces at intervals of 200 feet (61 m) at most (2010 ADA Standards, 403.5.3). A passing space is one of two things:
- A square: a space at least 60 by 60 inches (1525 × 1525 mm) (2010 ADA Standards, 403.5.3).
- A T-shaped intersection: where two walking surfaces meet, a T-shaped space whose base and arms extend at least 48 inches (1220 mm) beyond the intersection (2010 ADA Standards, 403.5.3). The T itself fits within a 60-inch square, with arms and base at least 36 inches (915 mm) wide (2010 ADA Standards, 304.3.2).
In practice, a long corridor between 36 and 59 inches wide needs a wider spot, or a meeting with another hallway, at least every 200 feet, so that people can pass each other without one of them having to back out. A corridor at least 60 inches wide needs no passing spaces, and if it keeps 60 inches at a U-turn, the turn rule above does not apply either.
In a building, a hallway intersection often does the job: a corridor that meets another one at a T can count as a passing space if the arms of the T reach 48 inches past the meeting point. The same passing space rule on outdoor walks is in ADA sidewalk requirements.
Floor, slope and changes in level
| Element | Requirement | Section |
|---|---|---|
| Running slope | not steeper than 1:20 (5 %) along the hallway | 2010 ADA Standards, 403.3 |
| Cross slope | not steeper than 1:48 (about 2 %) across it | 2010 ADA Standards, 403.3 |
| Surface | stable, firm and slip resistant | 2010 ADA Standards, 403.2 and 302.1 |
| Carpet | securely attached, with a firm pad or backing or none; pile 1/2 inch (13 mm) high at most; exposed edges fastened to the floor with trim along the whole edge | 2010 ADA Standards, 302.2 |
| Openings and grates | no opening that lets a 1/2-inch (13 mm) sphere through; long openings run across the direction of travel | 2010 ADA Standards, 302.3 |
| Changes in level | up to 1/4 inch (6.4 mm) may be vertical; from 1/4 to 1/2 inch (13 mm), beveled no steeper than 1:2; more than 1/2 inch, a ramp or curb ramp | 2010 ADA Standards, 403.4 and 303.2 to 303.4 |
A hallway that slopes more than 1:20 along its length is a ramp in the Standards (2010 ADA Standards, 106.5, “ramp”). Then its own rules apply: a running slope of 1:12 at most, a clear width of 36 inches (915 mm) and landings at least 60 inches (1525 mm) long, as wide as the ramp run (2010 ADA Standards, 405.2, 405.5, 405.7.2 and 405.7.3). They are in ADA ramp slope, and the ADA ramp calculator works out the length for any rise.
Carpet matters more than it looks. The advisory note explains that carpet and permanently affixed mats can greatly increase the force needed to push a wheelchair, that firmer carpet and backing lower it, and that a soft pad is better left out (2010 ADA Standards, advisory 302.2).
Objects that stick out into a hallway
Protruding objects on circulation paths follow section 307 (2010 ADA Standards, 204.1), and hallways are circulation paths (2010 ADA Standards, 106.5, “circulation path”). They matter most to people who are blind or have low vision, who can walk into a wall-mounted box before they find it:
| Object | Limit | Section |
|---|---|---|
| Wall-mounted objects with the leading edge more than 27 and up to 80 inches (685–2030 mm) above the floor | stick out 4 inches (100 mm) at most into the hallway | 2010 ADA Standards, 307.2 |
| Handrails | may stick out 4 1/2 inches (115 mm) at most | 2010 ADA Standards, 307.2, exception |
| Objects on posts or pylons, 27 to 80 inches (685–2030 mm) above the floor | overhang 12 inches (305 mm) at most; a sign between posts more than 12 inches apart has its lowest edge at 27 inches at most or 80 inches at least | 2010 ADA Standards, 307.3 |
| Headroom | 80 inches (2030 mm) at least; where it is lower, a guardrail or barrier with its leading edge 27 inches (685 mm) above the floor at most | 2010 ADA Standards, 307.4 |
| Door closers and door stops | may be as low as 78 inches (1980 mm) | 2010 ADA Standards, 307.4, exception |
| Protruding objects | may not reduce the required clear width | 2010 ADA Standards, 307.5 |
The 27-inch line is about the cane. The advisory note explains that an element within the range a cane can detect gives a person time to find it before their body touches it, and that elements on circulation paths, operable ones included, have to meet the protruding object rules: an open casement window, for example, may not stick out more than 4 inches into the path above 27 inches (2010 ADA Standards, advisory 307.2). Objects lower than 27 inches are not limited by section 307.2, but they still count against the 36 inches of clear width (2010 ADA Standards, 307.2, 307.5 and 403.5.1).
In a hallway, the usual offenders are fire extinguisher cabinets, display cases, wall-mounted signs and drinking fountains. Fountains have their own reference to section 307 (2010 ADA Standards, 602.1), and the way to mount one without creating a hazard is in ADA drinking fountain height. Section 403 does not require handrails along a hallway; where they are provided along a walking surface no steeper than 1:20, they follow section 505 (2010 ADA Standards, 403.6 and 505.1), explained in ADA handrail requirements.
Existing buildings and remodeling
In an existing building, the hallway also comes up when part of the building is remodeled. For businesses and other private entities, the Department of Justice rule works like this:
- Path of travel: when an area containing a primary function is altered, the path of travel to it, and the restrooms, telephones and drinking fountains that serve it, are made accessible to the maximum extent feasible, unless the cost and scope are disproportionate to the overall alteration (2010 ADA Standards, 28 CFR 36.403(a)(1)).
- Corridors are part of it: an accessible path of travel may consist of clear floor paths through lobbies, corridors and rooms, among other elements (2010 ADA Standards, 28 CFR 36.403(e)(2)). Corridors, entrances and restrooms are not areas containing a primary function themselves (2010 ADA Standards, 28 CFR 36.403(b)).
- The 20 % line: the cost of the path of travel is disproportionate when it exceeds 20 % of the cost of the alteration to the primary function area (2010 ADA Standards, 28 CFR 36.403(f)(1)). Above that line, the path of travel is still made accessible to the extent it can be without disproportionate cost, and priority goes, in this order, to an accessible entrance, an accessible route to the altered area and at least one accessible restroom for each sex or a single unisex restroom, then telephones and drinking fountains (2010 ADA Standards, 28 CFR 36.403(g)(1) and (2)).
- Safe harbor: path of travel elements built or altered to the 1991 Standards do not have to be retrofitted to the incremental changes of the 2010 Standards just because a primary function area they serve is altered (2010 ADA Standards, 28 CFR 36.403(a)(2)).
For what the ADA asks of an existing business that is not remodeling, see ADA compliance.
How to check a hallway with a tape measure
If you manage a shop, an office or a clinic, or you want to know whether you can get to the restroom at the back, five checks cover most of section 403:
- Clear width. Measure the narrowest point between whatever is built in or sticks out on either side, not wall to wall: 36 inches at least, and 32 inches only for a stretch no longer than 24 inches (2010 ADA Standards, 403.5.1).
- U-turns. Where the hallway doubles back around a wall or partition less than 48 inches wide: 42 inches before the turn, 48 at it and 42 after it, unless the turn is 60 inches wide (2010 ADA Standards, 403.5.2).
- Passing spaces. If the hallway is under 60 inches wide, look for a 60-by-60-inch space or a T-shaped intersection at least every 200 feet (2010 ADA Standards, 403.5.3).
- Walls and ceiling. Anything with its lower edge between 27 and 80 inches high sticks out 4 inches at most, and nothing hangs lower than 80 inches over the path (2010 ADA Standards, 307.2 and 307.4).
- Floor. No steeper than 1:20 along the hallway and 1:48 across it; carpet pile no higher than 1/2 inch; a lip over 1/4 inch beveled, and over 1/2 inch ramped (2010 ADA Standards, 403.3, 302.2 and 303).
A hallway can pass all five and still be blocked on a given day by boxes, a cleaning cart or stacked chairs. The rule is about what is built, but what you meet is what is there.
Hallways in Braillito Maps
The measurements above answer a practical question: once you are inside, can you get to the counter, the table or the restroom? Braillito Maps is a community map of accessible places that answers ten questions about each one: step-free entrance or ramp, wide doorway, accessible restroom, accessible parking, tactile paving, braille signage, braille menu, audible signals, guide dogs welcome and a quiet environment. Each answer is yes, no or no data until someone knows, and the score of a place is the number of yes answers out of ten, always shown with its number, never by color alone.
The hallway is not a question of its own, but it decides several of them. An accessible restroom is only useful if the corridor that leads to it is wide enough, so it is worth checking the hallway on the way when you answer the restroom question. The wide doorway question covers the door, and the five checks above cover what comes after it. For someone who is blind, the useful answers are braille signage on the rooms along the corridor, tactile paving and a quiet environment, because noise covers the sounds a person uses to find their way.
When you add a place, mark only what you saw and leave the rest without data. And if what a place says is wrong, it can be reported, so the next person does not find a 30-inch hallway behind a restroom marked yes. Meet Braillito Maps.
Frequently asked questions
What is the minimum hallway width under the ADA?
36 inches (915 mm) of clear width for a hallway that is part of an accessible route (2010 ADA Standards, 403.5.1). Objects that protrude from the walls may not reduce it (2010 ADA Standards, 307.5).
Can an ADA hallway be 32 inches wide?
Only at a short pinch point: 32 inches (815 mm) for a length of 24 inches (610 mm) at most, with segments at least 48 inches (1220 mm) long and 36 inches (915 mm) wide between narrow points (2010 ADA Standards, 403.5.1, exception).
How wide does an ADA corridor have to be at a turn?
Where it makes a 180-degree turn around an element less than 48 inches wide: 42 inches (1065 mm) approaching the turn, 48 inches (1220 mm) at the turn and 42 inches leaving it. It does not apply if the turn is at least 60 inches (1525 mm) wide (2010 ADA Standards, 403.5.2).
How often does an ADA corridor need a passing space?
Where it is narrower than 60 inches (1525 mm), at intervals of 200 feet (61 m) at most. Each passing space is a 60-by-60-inch square, or a T-shaped intersection of two walking surfaces whose base and arms extend at least 48 inches (1220 mm) beyond it (2010 ADA Standards, 403.5.3).
How far can objects stick out into an ADA hallway?
4 inches (100 mm) at most for objects with their leading edge between 27 and 80 inches (685–2030 mm) above the floor, and 4 1/2 inches (115 mm) for handrails. Headroom is at least 80 inches (2030 mm) (2010 ADA Standards, 307.2 and 307.4).
Does an ADA hallway have to be 60 inches wide?
No. The minimum is 36 inches (2010 ADA Standards, 403.5.1). At 60 inches or more, a corridor needs no passing spaces and the wider turn rule does not apply (2010 ADA Standards, 403.5.2 and 403.5.3).
More accessibility guides
- ADA door width: 32 inches of clear width, maneuvering space, thresholds, hardware and opening force.
- ADA turning space: the 60-inch turning circle, the T-shaped turn, the 30 by 48 inch clear floor space and where the ADA asks for each.
- ADA sidewalk requirements: clear width, passing spaces, grade, cross slope, surface, protruding objects and street furniture, on public sidewalks and on site.
- ADA ramp slope: the 1:12 rule, width, landings, handrails and edge protection.
- ADA handrail requirements: handrail height, diameter, clearance from the wall and the extensions at ramps and stairs.
- ADA drinking fountains: spout height for wheelchair users and for standing people, hi-lo units, knee clearance, controls and water flow.
- ADA compliance: a checklist for small businesses, with the 2010 Standards section behind each item.
- 2010 ADA Standards: what each of the ten chapters covers, since when the Standards apply and to which buildings, with the guide for each element.
- All accessibility guides
Sources
Every figure in this guide comes from one of these official texts, which we read in October 2026.
- 2010 ADA Standards for Accessible Design. U.S. Department of Justice, published September 15, 2010; required for new work since March 15, 2012.
Braillito Maps
Find places with ramps, accessible toilets or tactile paving near you in Braillito Maps
In Braillito Maps, every place answers ten questions: step-free entrance or ramp, wide doorway, accessible restroom, accessible parking, tactile paving, braille signage, braille menu, audible signals, guide dogs welcome and a quiet environment. It is built by the people who need it, and every place gets a score out of ten.
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