Toilet centerline + front clearance

Description

Toilet centerline must sit at least 16 inches from any side wall, fixture, or partition (NKBA Guideline 18; IRC requires only 15").

Why this exists

Toilet centerline must be at least 15 in from any wall, fixture, or partition; 21 in front clearance for a person to stand and turn.

Categories

Source

Solver enforcement

The constraint solver runs check function fix-toilet-clearance-01 as a hard constraint — layouts that fail are rejected outright.

Backed by research

• Toilet centerline must be at least 15 inches from any wall, fixture, or partition; 21 inches of clear space in front for use.

  Association (2024), NKBA — Guideline 5 — view source ↗

See the full research bibliography for context. Our licensing principle describes how we cite published research without using the underlying datasets.

Plan symbols this applies to

These plan symbols invoke this directive when placed on a floor plan. Click any to see where it's drawn and what other rules apply to it.

Related directives

• Bathroom entry doorway · NKBA Bath 1
• Doorway swing clearance · NKBA Bath 2
• Clear floor space at fixtures · NKBA Bath 3
• Fixture clear-space overlap · NKBA Bath 4
• Toilet centerline + front (detailed) · NKBA Bath 5