Bathroom vanity clearances in plan — IRC and NKBA minimums around the vanity
Code sets the floor: a toilet centerline ≥15″ from the vanity edge (IRC R307.1 / IPC 405.3.1) and ≥21″ of clear floor in front of the lavatory, and the entry door must not swing into the vanity. NKBA’s 18″ and 30″ make the room comfortable.
What this diagram shows
A top-down plan of a bathroom vanity against the back wall showing the clearances the calculator checks. An adjacent toilet must have its centerline at least 15 inches from the vanity edge — the IRC R307.1 and IPC 405.3.1 minimum — and NKBA recommends 18 inches. There must be at least 21 inches of clear floor in front of the lavatory per the IRC, with NKBA recommending 30 inches, shown as a green zone. The bathroom entry door must not swing into the vanity. A legend marks the blue dimensions as the code minimum and the green zone as the NKBA recommended clearance.
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