San Francisco Deck Permit

What's Required in San Francisco

• Building Permit required for all decks over 30 inches above natural grade
• Planning Department review mandatory for any deck over 3 feet (36 inches) high
• Projects that expand the footprint or exterior features require a Planning Approval letter
• Guardrails (min 42 inches high) required if deck surface is more than 30 inches above grade
• Firewalls may be required if the deck is within 3–5 feet of a property line
• Neighborhood notification (10-day notice) is required for most decks in required rear yards

When a Deck Needs a Permit in San Francisco

Whether a deck needs a building permit in San Francisco usually comes down to how high and how big it is. Low, ground-level platforms are often exempt, while raised decks need a permit — in San Francisco, the line is a deck floor more than 30 inches above grade (where guardrails and footings come into play). Attached decks almost always require a permit because they tie into the house’s structure, and even a freestanding deck usually needs one once it passes the size or height cutoff. Check the requirements above before you build, and note that zoning setbacks from property lines apply regardless.

Do You Need a Permit to Repair or Replace a Deck in San Francisco

It depends on how much you’re changing. Swapping worn decking boards or railing on the same layout is usually treated as maintenance and often doesn’t require a permit in San Francisco. But replacing the structural framing (joists, beams, posts, or footings), rebuilding the deck, enlarging it, or changing its height generally does — at that point it’s regulated like new construction. When in doubt, describe the scope to the San Francisco Department of Building Inspection before starting; the requirements above outline what San Francisco expects.

How to Get a Deck Permit in San Francisco

Frequently Asked Questions