Minimum Bathroom Size with Shower: Dimensions & Space Planning

The absolute minimum bathroom size with a shower is 36 inches × 36 inches (3 ft × 3 ft / 91 cm × 91 cm). This compact layout accommodates a toilet, sink, and shower but offers minimal extra space.

Practical Considerations

• Typical locations: Small apartments, tiny homes, accessory dwelling units (ADUs).
• Code requirements: Local building codes may mandate larger minimums (often 30-35 sq ft / 2.8-3.3 m²).
• Fixture selection: Corner showers, wall-mounted toilets, and pedestal sinks maximize usable space.
• Clearances: Minimum 21" (53 cm) in front of toilet/sink; 24" (61 cm) shower entry.

Recommended Minimums for Comfort

• Functional minimum: 40" × 40" (11 sq ft / 1 m²) for basic maneuverability.
• Comfortable minimum: 5 ft × 7 ft (35 sq ft / 3.3 m²) for standard fixtures and ease of movement.

Always verify local building codes and consult a designer/contractor for your specific project.