How much clearance does a shower need by code?
The IRC requires at least 24 inches (61 cm) of clear space in front of the shower opening, and a shower interior of at least 30 by 30 inches (IRC P2708.1). Those are legal minimums; a comfortable walk-in shower starts closer to 36 inches wide. Local codes can differ, so always check yours.
The numbers
- 24 in (61 cm) clear in front of the shower opening (IRC Figure R307.1).
- 30 by 30 in minimum interior (IRC P2708.1); comfort starts around 36 in.
Checked August 2026 against the model code; local amendments happen, so verify locally before you build.
Test it in two minutes
Drag a walk-in shower into the free bathroom planner: the code check watches the front clearance, the comfort layer marks tight walkways, and the estimate shows what moving the drain would cost. All clearances in one place: bathroom clearances guide.
Frequently asked questions
Is a 30 by 30 shower actually usable?
It passes inspection and washes elbows, barely. In practice 32 by 32 feels tight, 36 by 36 is where a shower starts feeling normal, and walk-in comfort begins around 40 inches. Draw both in the planner and the difference is obvious.
Where is the 24 inches measured?
Straight out from the shower opening: the strip you step into. A vanity, toilet or wall inside that strip is a code problem, not just an inconvenience; the planner flags it the moment something crosses the line.
Does the shower door direction matter?
Yes: a hinged shower door must be able to open fully without hitting a fixture, and the room door may not swing into the clearance either. The planner watches the room door swing automatically once you place it.