🏛️ Building Code Quick Reference
Quick reference for common building code requirements. Always verify local codes.
Stairs
| Requirement | Minimum | Maximum | Notes |
|---|---|---|---|
| Rise | 4" | 7" | Height per step |
| Run | 11" | — | Tread depth |
| Headroom | 6'8" | — | Clear height |
| Width | 36" | — | Minimum |
Guardrails
| Location | Height | Notes |
|---|---|---|
| Residential | 36" | Decks, balconies |
| Commercial | 42" | Public areas |
| Openings | under 4" | Maximum opening |
Egress
Doors
- Minimum width: 32" clear opening
- Minimum height: 80" (6'8")
- Swing: Must swing in direction of egress
Windows
- Egress windows: 5.7 sq ft opening, 24" high, 20" wide
- Sill height: Maximum 44" above floor
Electrical
Outlets
- Spacing: Maximum 12 feet apart
- Kitchen: Counter outlets every 4 feet
- Bathroom: GFCI required
Lighting
- Habitable rooms: Minimum 1 window or artificial light
- Stairs: Light required
Plumbing
Fixtures
- Toilets: Minimum 1 per dwelling unit
- Bathroom: Sink, toilet, tub/shower
- Kitchen: Sink required
Water Heater
- Temperature: Maximum 120°F at fixtures
- Relief valve: Required
Fire Safety
Smoke Detectors
- Bedrooms: Required in each bedroom
- Hallways: Required outside bedrooms
- Interconnected: In new construction
Fire Extinguishers
- Kitchen: Required in some jurisdictions
- Commercial: Per occupancy requirements
Accessibility (ADA)
Ramps
- Slope: Maximum 1:12 (8.33%)
- Width: Minimum 36"
- Landings: Required at top, bottom, every 30'
Doors
- Clear opening: Minimum 32"
- Threshold: Maximum 1/2" high
Related Resources
- Stair Calculator - Calculate code-compliant stairs
- Construction Math Reference - Formulas
Check Local Codes
Building codes vary by jurisdiction. Always check local building codes - this is general reference only.