The correct measurements for a toilet is at least 21 inches in the front of the toilet, 15 inches on the sides, and at least 30 inches from anything else in the bathroom. This means the sink and the bathtub.
Overall, proper toilet clearances contribute to efficient bathroom design and promote well-being for all users. Minimum clearances between the face of the toilet fixture and the wall or nearest obstruction element are at least 24” (61 cm) but are recommended to be 36” (91 cm).
1210.4 Fixture Clearances
The clear space in front of water closets and bidets in residential structures shall be 21 inches (533 mm) minimum. For all other occupancies, the clear space in front of water closets and bidets shall be 24 inches (610 mm) minimum.
Any plumbing professional can tell you that the standard is a 12” rough-in, and this is true for both two-piece and one-piece toilets.
The standard rough-in dimensions for toilets is 12 inches. In older homes or small bathrooms, you'll sometimes see rough-in dimensions of 10 inches or 14 inches. Determine your bathroom's rough-in by measuring from the wall behind the toilet to the middle of the bolts on the base of the toilet.
For most toilet installations, the rough-in is 12 inches. Sometimes in small baths or older homes it can be 10 to 14 inches.
Toilet. Clearance: Leave at least 21" of space in front of the toilet. Placement: Leave at least 15" of space from the center of the toilet to a wall or another object. To ensure privacy, install a toilet out of direct sight – off to one side of the doorway or hidden behind the vanity.
While a 10-inch rough-in toilet can plausibly fit into a 12-inch rough-in (though a longer connector may be needed), the same cannot be said for using a 12-inch rough-in toilet in a 10-inch rough-in. A 12” rough-in toilet will not fit in a bathroom with a 10” rough-in size.
Rough-In Dimensions for Toilets
Supply line (horizontal): 6 inches maximum to either side of the toilet centerline. Discharge/drain hole from back wall: 12 1/2 inches, providing enough space to install the toilet. Discharge/drain hole from back wall (vertical): Zero distance (drain located at floor height)
Generally, it is recommended that you purchase a new toilet with the exact rough-in measurement as the original toilet.
The minimum required ceiling height for bathrooms, toilet rooms and laundry rooms is 6 feet 8 inches (2032 mm).
Toilet Spacing and Design
At least 15 inches to any partition or side wall (measured from its center). 30 inches minimum away from any adjacent fixture (measured center to center). At least 21 inches clearance from a wall, fixture or door.
You need at least a 20 cm distance from other sanitary facilities on both sides. Leave a 55 cm space in front of the wash basin so that people have enough room to move. Toilets: Similar to wash basins, allow 20 cm on both sides for room to move. A 60 cm space is needed in front of the toilet.
Toilet front clearance: Bathroom building code or design practices recommend that toilets need at least 21 inches of clearance in front of the toilet. Opting for 30 inches of room provides a more comfortable space.
Add half of your toilet's base to the 21 inches (53 cm) on your tape. Most toilet bases are between 12–24 inches (30–61 cm), although your base may be different. Divide the length of the base in half and add it to your measurement to make sure that you have at least 21 inches of clearance in front of the toilet.
In a toilet containing only a commode and a wash basin, such as in a powder room, a 5' X 4' size is the minimum requirement. Instead of following this size, a toilet no narrower than 3' can also be designed, keeping in mind that the minimum area required for this toilet without a shower will be 20 square feet.
So looking at the toilet, make sure there are at least 15 inches of clearance from the center of the toilet to any adjacent fixture (or wall). For example: If a bath vanity is next to your toilet, you'll need 15″ of clearance. If a tub is next to your toilet, you'll need 15″ of clearance.
Typically, the standard rough-in size is 12 inches, though older homes may have 10-inch or 14-inch rough-ins. Smaller bathrooms often feature 10-inch rough-ins, while larger ones may have 14-inch rough-ins.
Most modern plumbing codes require P-trap toilets for residential installations.
1. Space-saving: One of the primary reasons to choose a 10-inch rough-in toilet is its ability to fit into tighter spaces. In bathrooms where space is limited, such as in small apartments or powder rooms, a 10-inch rough-in toilet allows for efficient use of space without compromising on comfort or functionality.
Where existing plumbing is concerned, an elongated toilet will fit in the same location as the original in most situations. Plumbing codes usually require that the drain pipe the toilet sits over be a standard offset from the wall behind it.
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.
The correct measurements for a toilet is at least 21 inches in the front of the toilet, 15 inches on the sides, and at least 30 inches from anything else in the bathroom.
Generally, building regulations state that the minimum size for a loo is to be 700mm wide and 1300mm long. However, that can be uncomfortable if you have large family members, or expect guests who are pleasantly plump to be using your loo.