Bathroom space planning—toilet space, tub space, room for counters and sinks—is more critical than in other areas of the home. You might have a few extra square feet in the basement to place the washer or dryer anywhere you like; not so in the bathroom. Bathroom fixtures are difficult to move around once they have been installed. So, it is vitally important to get your bathroom's floor plan right the first time.
Toilet Space to the Front
The minimum space in front of the toilet is a minimum of 21 inches, though 30 inches is the favored recommendation.
Front toilet space clearance not only ensures that the user has enough room to take care of needs, but that other services, namely the shower, sink, tub, and door, remain unobstructed.
- Minimum: 21 inches from the front of the toilet
- Recommended: 30 inches from the front of the toilet
- Disabled access: 30 inches to 48 inches from the front of the toilet
Toilet Space to the Side
The recommended minimum distance from the toilet's center line to the nearest side wall, partition, or fixture is 15 inches. The favored distance is 18 inches or more to the nearest side wall, partition, or fixture.
If you need to save room, pushing the toilet side space to a bare minimum is often helpful. When measuring toilet side clearances, always measure from the toilet's imaginary center line to the nearest side obstruction.
If mounted on the wall, the toilet roll holder will need several inches of extra space, as well. But if you're looking to save room on the side of the toilet, consider toilet roll holder alteratives. You can mount the toilet paper on a separate stand. Or insert the toilet roll holder in the wall to save an extra few inches.
- Minimum: 15 inches to the nearest side wall, partition, or fixture
- Recommended: 18 inches to the nearest side wall, partition, or fixture
Bathroom Sink Space
Placement guidelines differ between single and double basin sink configurations. These spacing guidelines mostly apply to countertops where you are making the sink cutouts. If you purchase a bathroom vanity top, you will not have any choice as to sink cutout placement as they come pre-cut.
Bathroom Double Sink Placement
When installing two basins, space them at least 36 inches away from each other.
Measure from one center line to the next center line. This is the recommended minimum distance to allow users to use both sinks simultaneously if needed. The distance also provides adequate room for the plumbing below the sink.
Bathroom Sink Distance From the Wall
Place bathroom sinks 20 inches from the back wall, recommended. The bare minimum is 15 inches.
This is measured from the sink's center point to the wall. Bathroom vanities with precut sinks should already meet the spacing guidelines.
Bathroom Counter Placement From Front Obstruction
Place the bathroom counter at least 30 inches from any front obstruction, recommended. The bare minimum is 21 inches.
This is measured from the edge of the countertop to the leading edge of the obstruction.
Code Requirements
Local building codes are often silent on matters of recommended optimal spacing of toilets, sinks, bathtubs, and showers. Minimums may be found in the code, but these minimums can often be meager for real-world use.
Instead, home improvement industry groups such as the non-profit National Kitchen and Bath Association (NKBA) draw up recommendations that many bathroom and kitchen designers use when laying out the rooms. Yet even NKBA guidelines should be regarded as bare minimums. If you do have any extra room, you should consider increasing the NKBA guidelines by several inches.
One clearance issue that often comes up: How much clearance should you leave in front of a toilet? You can look at this from three angles. Minimum recommendations tend to be 21 inches.
But as this allows less than two feet in front of the toilet, the NKBA recommends adding even more space: up to 30 inches, minimum. Yet that is not a satisfactory clearance for wheelchairs. Thirty inches is considered the absolute bare minimum for wheelchairs or walkers to clear the passage, with 48 inches being a more comfortable space.