Skip to main content
Skip to main content

🏛️ Building Code Quick Reference

Quick reference for common building code requirements. Always verify local codes.

Stairs​

RequirementMinimumMaximumNotes
Rise4"7"Height per step
Run11"—Tread depth
Headroom6'8"—Clear height
Width36"—Minimum

Guardrails​

LocationHeightNotes
Residential36"Decks, balconies
Commercial42"Public areas
Openingsunder 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
Check Local Codes

Building codes vary by jurisdiction. Always check local building codes - this is general reference only.