Half bath layout
Half bath = sink + toilet only. Minimum 3×6 feet. Two layouts: linear (3×6) or L (4×5).
A half bath has a toilet and a sink — no tub, no shower. The smallest functional bathroom; common on first floors for guest use.
In this guide
- 1
Linear layout (3×6 feet)
Toilet at one end, sink at the other — both against the long wall (so they share a plumbing wall). Width 3 feet = minimum 15 inches from toilet centerline to each side = 30. Plus 6 inches of vanity overhang. Length 6 feet = toilet (30 in. deep incl. clearance) + sink (24 in.) + walkway (18+ in.).
- 2
L layout (4×5 feet)
Toilet on one wall, sink on perpendicular wall. Slightly more generous than linear; feels less cramped. Two plumbing walls = more expensive but better-looking.
- 3
Fixtures and finishes
Vanity: 18-24 inches wide × 16-18 deep. Pedestal sinks fit even smaller spaces. Toilet: standard 28 inches deep × 19 wide. Mirror above vanity. Towel ring or small towel bar.
Frequently asked questions
What's the minimum half bath size?
3 × 6 feet. Toilet and sink in a line along the plumbing wall.
What is the minimum half-bath size?
About 3×6 ft (18–20 sq ft) fits a toilet and a small sink with code clearances — 15 in from the toilet centerline to each side and 21 in in front.
How do I lay one out in RoomSketch3D?
Draw the small room, drop in the toilet and sink from the catalog, and let Flow Check keep the side and front clearances honest.
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