How much space do you need beside a toilet?

The model code calls for at least 15 in from the toilet’s center to any side wall, partition or vanity.

How much space do you need in front of a toilet?

At least 21 in to any wall, fixture or door in the model code. Your local code may require more; check it.

Does this check the shower and vanity?

No. It checks the toilet clearances only. Shower size and other fixtures have their own code sections.

Can I move my toilet?

Usually, with a permit and a licensed plumber. The drain has to slope and vent correctly. Confirm with your building department.

HyreRemodel tools

Bathroom layout planner

Enter where the toilet will sit: its center to the nearest side obstruction, the clear space in front, and the distance to the next fixture.

A bathroom layout planner checks a planned toilet against the model-code clearances. The toilet’s center must be at least 15 in from any side wall, vanity or obstruction, with at least 21 in clear in front and 30 in center to center to the next fixture. Your local code may require more.

Check your toilet position

Measurements in inches. Nothing is stored or emailed.

— Side clearance

— Front clearance

— Next fixture

What this assumed —

A check against the model code. Your building department’s code governs.

The toilet clearances the bathroom layout planner checks

The bathroom layout planner checks three water closet distances found in the model code.

Measure	Minimum	Measured from
Side	15 in	Center of the toilet to any side wall, partition, vanity or other obstruction
Front	21 in	Front of the toilet to any wall, fixture or door
Next fixture	30 in	Center to center between adjacent fixtures
Toilet compartment	30 × 60 in	Width × depth, floor-mounted toilet

As restated in the installation section of ICC-ES PMG-1096 listing, installation section, published by ICC Evaluation Service, an International Code Council subsidiary. In the IRC, fixture spacing sits under Section R307. Your local code may set larger figures.

Worked example

A toilet beside a vanity

Side

The toilet center sits 14 in from the vanity edge. That is 1 in short of 15 in. Moving the drain 1 in, or using a narrower vanity, fixes it.

Front

24 in to the tub in front: OK against 21 in. A door swinging into that space is a question for your building department.

What else a bathroom layout must satisfy

Bathroom ventilation is set by IRC R303.3. It calls for a window of not less than 3 sq ft, at least half of it openable, or an exhaust fan of 50 cfm intermittent or 20 cfm continuous.

The fan must exhaust directly to the exterior. Terminating into an attic, crawl space, garage or any other interior space is not allowed.

Shower size, door widths and electrical outlets have their own code sections. The planner does not check them; your designer and building department do.

Moving a toilet drain is plumbing work and usually needs a permit. Have a licensed plumber and your building department confirm the layout. See permits and approvals.

What the bathroom layout planner leaves out

The bathroom layout planner checks distances, not design. Comfort, storage and accessibility often call for more space than the minimum. See small bathroom remodel and bathroom remodeling.

To price the room, use the bathroom remodel cost calculator, or plan your remodel with us.

Questions this calculator answers

How much space do you need beside a toilet?: The model code calls for at least 15 in from the toilet’s center to any side wall, partition or vanity.
How much space do you need in front of a toilet?: At least 21 in to any wall, fixture or door in the model code. Your local code may require more; check it.
Does this check the shower and vanity?: No. It checks the toilet clearances only. Shower size and other fixtures have their own code sections.
Can I move my toilet?: Usually, with a permit and a licensed plumber. The drain has to slope and vent correctly. Confirm with your building department.

Sources and methodology

Figures dated October 22, 2026. Last reviewed August 16, 2026.

ICC-ES PMG-1096 listing (water closets), installation section (ICC Evaluation Service, retrieved October 22, 2026). 15 in side, 21 in front, 30 in center to center, 30 × 60 in compartment.
2021 International Residential Code, Sections R307 and R303.3 (International Code Council, retrieved September 5, 2026). Fixture spacing and bathroom ventilation. Adoption is local.

Bathroom remodeling The full job.
Small bathroom remodel Where every inch counts.
Kitchen layout planner The same check for kitchens.
Permit checker Whether the work needs a permit.

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