Clearances & Circulation
Clearances and circulation
Clearance is the one thing you cannot decorate your way out of. Get it wrong and the room is permanently slightly annoying.
On this page (3 sections)
Short answer
36 in (91 cm) is the working minimum for a route people use every day, 30 in (76 cm) for a secondary path between furniture, and 22 to 24 in (56 to 61 cm) is the absolute squeeze past a coffee table. Anything narrower stops being a route and becomes an obstacle.
The numbers, at a glance
- Primary walkway
- 36 in (91 cm)IRC egress path minimum
- Secondary path between furniture
- 30 in (76 cm)
- Two people passing
- 42 to 48 in (107 to 122 cm)
- Wheelchair turning circle
- 60 in (152 cm)ICC A117.1
- Minimum hallway
- 36 in (91 cm)IRC R311.6
- Clear door width for access
- 32 in (81 cm)ADA 404.2.3
Every plan is really two plans laid on top of each other: the furniture, and the space between it. Most people draw the first and hope the second works out. It rarely does, because the space between furniture is governed by the width of a human body carrying something, and that number does not negotiate.
A body at rest is about 18 in (46 cm) across the shoulders. A body walking normally, with the small lateral sway that walking involves, sweeps closer to 24 in (61 cm). A body carrying a laundry basket, a tray or a toddler needs 30 in (76 cm). Two bodies passing without either turning sideways need 42 to 48 in (107 to 122 cm). Those four numbers explain almost every clearance rule in this section, including the ones written into building code.
The order to solve a room in#
Clearance is a constraint, not a preference, so it comes first.
- Draw the routes people must take: door to door, door to seat, door to the thing they use most.
- Give each route its width from the table below, measured to the face of the furniture, not to the wall behind it.
- Place the furniture in what is left.
- If the furniture does not fit, the furniture is the wrong size. Do not shave the route.
Step four is where most rooms go wrong. A 40 in (102 cm) deep sofa in a 12 ft (3.7 m) room is not a comfortable sofa: it is a 24 in (61 cm) walkway with a sofa attached.
The clearance table#
| Situation | Comfortable | Workable | Absolute minimum |
|---|---|---|---|
| Main route through a room | 42 in (107 cm) | 36 in (91 cm) | 30 in (76 cm) |
| Between coffee table and sofa | 18 in (46 cm) | 16 in (41 cm) | 14 in (36 cm) |
| Past a coffee table, side route | 30 in (76 cm) | 24 in (61 cm) | 22 in (56 cm) |
| Kitchen work aisle, one cook | 48 in (122 cm) | 42 in (107 cm) | 36 in (91 cm) |
| Dining chair pulled out, walk behind | 48 in (122 cm) | 44 in (112 cm) | 36 in (91 cm) |
| Beside a bed you use | 36 in (91 cm) | 30 in (76 cm) | 24 in (61 cm) |
| In front of a chest of drawers | 40 in (102 cm) | 36 in (91 cm) | 30 in (76 cm) |
| Wheelchair route | 42 in (107 cm) | 36 in (91 cm) | 32 in (81 cm) at a point |
In this section#
- Accessible clearances for homesADA and ICC A117.1 numbers translated for private homes: 32 in doors, 36 in routes, 60 in turning circle, 30 x 48 in clear floor space.
- Door sizes, swings and the space they needStandard door sizes 24 to 36 in x 80 in, rough openings, clear width vs nominal, and the 32 in (81 cm) accessible clear width rule.
- Hallway widths that workIRC sets 36 in (91 cm) as the minimum hallway width. 42 to 48 in (107 to 122 cm) is where a corridor starts to read as a room.
- Imperial and metric: the dimension systems that collide in a house24 in is 609.6 mm, not 600. The near-miss conversions that ruin cabinet runs, appliance gaps, doors and beds, with a full reference table.
- Stair dimensions: rise, run, headroom and handrailsIRC 2021 stair rules: 7.75 in (197 mm) max riser, 10 in (254 mm) min tread, 6 ft 8 in headroom, 36 in width, plus UK Part K compared.
- Walkway and circulation widths at homeHow wide a walkway should be in a house: 36 in (91 cm) for primary routes, 30 in (76 cm) secondary, 22 in (56 cm) absolute squeeze.
- Will it fit? Measuring the delivery pathThe four measurements and three formulas that decide whether furniture gets in: clear width, end diagonal, corner turns and tilt geometry.
Where these numbers come from#
The hard minimums are code: the International Residential Code sets hallway width and stair geometry, and the ADA Standards and ICC A117.1 set accessible clearances. The comfortable figures are the ergonomic literature, principally Panero and Zelnik's Human Dimension and Interior Space and Neufert's Architects' Data, plus the NKBA planning guidelines for kitchens and bathrooms. Every page in this section says which of the two it is quoting. See standards and sources for the full list.