Do I need a permit for a roof replacement in
San Bruno, California?

San Bruno roof replacement permits — the key details

San Bruno follows California's Title 24 energy code and the California Building Code (CBC), which adopts IRC R905 and R907 standards. The primary trigger for a permit is any tear-off-and-replace of existing roofing, or any replacement that covers more than 25% of the roof area. Per IRC R907.4, if your roof currently has two existing layers of shingles or other material, a third layer (an overlay without tear-off) is prohibited — you must tear off to one layer minimum. San Bruno Building Department inspectors check this in the field during the pre-work inspection; if they discover a hidden third layer during the job, work stops and you face fines plus forced removal. The city's online permit portal allows you to submit documents electronically, but inspectors often request additional clarification via email, so plan for a 3–7 day back-and-forth before approval is issued.

Material changes always require a permit and structural evaluation. If you're upgrading from asphalt shingles to metal, clay tile, or concrete tile, the Building Department requires a structural engineer's sign-off to confirm the roof deck (trusses, rafters, headers) can support the added weight. Metal roofing adds 50–100 lbs per square (vs. 250–300 for tile); inspectors will ask for a stamped structural assessment if there's any doubt. Underlayment specs are mandatory: San Bruno's coastal location means inspectors enforce strict ice-and-water shield placement per IRC R908.2 — the shield must extend from the eaves up to at least 24 inches inside the building line (or to the interior wall line in conditioned space), even on single-layer tear-offs. Fastening patterns must be called out on the permit application or on a note sheet provided by your roofing contractor; IRC R905.2 specifies nail spacing and type by roof slope and wind speed. For San Bruno's coastal zone, expect 6-inch nail spacing in high-wind areas and explicit fastening schedules on plans.

Exemptions are narrow but real. Repairs to fewer than 10 squares (100 sq. ft. per square = 1,000 sq. ft. max) of existing roof using the same material and not requiring deck work are often permit-exempt under CBC Section 105.2.3. Gutter replacement, flashing repair, or re-sealing without touching the underlying sheathing is also exempt. However, if the repair requires removal of shingles and inspection of the deck (common if you've had a leak), the city often requires a permit because the work triggers a structural inspection. It's safer to assume a permit is needed unless your contractor explicitly confirms exemption status with the city's plan-review staff before starting work. Many San Bruno contractors submit a simple 'Request for Exemption' form to avoid disputes mid-project.

San Bruno's geographic position in a coastal flood zone adds complexity. Properties in FEMA A or AE zones (check the Flood Insurance Rate Map or ask your agent) may require a permit that includes flood-elevation language or a Flood Development Permit from the city's planning staff. If your roof is being replaced as part of a flood-mitigation project (e.g., raising the roof line), the permit review expands to 4–6 weeks. The city also enforces California's Title 24 solar-readiness rules (CBC Section 110.2); if your roof faces south or west and is suitable for solar panels, the permit may include a solar-easement disclosure or attachment point requirement. This rarely blocks a roof permit but can add 1–2 weeks to review if the city's planning staff needs to weigh in.

Contractor vs. owner-builder considerations: California's Business & Professions Code Section 7044 allows owner-builders to pull roofing permits without a license, but many San Bruno contractors insist they pull the permit themselves (they're licensed, and the city issues the permit to them, with you as the property owner). This shifts liability to the contractor if inspections fail. If you're pulling the permit yourself, you must be present for all inspections and sign off on the final. San Bruno's Building Department typically issues permits to the contractor, requiring a signed contract showing the contractor as the applicant and you as the property owner. Permit fees run $100–$400 depending on the roof area and complexity; the city usually charges a base fee of $75–$150 plus $0.50–$1.00 per roofing square (100 sq. ft.). A 3,000 sq. ft. roof (30 squares) might cost $175–$300 in permit fees alone, plus inspection fees if the city charges separately. Check the city's current fee schedule online or call the Building Department to confirm.

Three San Bruno roof replacement scenarios

San Bruno's coastal wind loads and underlayment requirements

San Bruno sits in a high-wind coastal zone, and the City of San Bruno Building Department enforces strict underlayment and fastening specs that inland Bay Area cities don't always catch. The CBC Section 1405 and IRC R905.2 specify that roofing in areas with design wind speeds above 100 mph (San Bruno's coastal neighborhoods fall into this category) require high-wind fastening schedules — typically 6-inch nail spacing in the field vs. 8-inch spacing in lower-wind zones. Inspectors physically measure nail spacing during the mid-work inspection, and violations result in a 'fail' and rework requirement.

Ice-and-water shield (or self-adhering underlayment) placement is equally critical and often overlooked. IRC R908.2 requires the shield to extend from the eaves to a point at least 24 inches inside the building line (measured horizontally from the wall plane). Many roofers install it only to the 'inside of the overhang' (sometimes 12–18 inches), which fails inspection in San Bruno. The city's plan-review staff note this on the permit approval, and inspectors verify it during the mid-work walk. If the shield is undersized, the inspector will not sign off final.

For coastal properties, ask your roofing contractor to specify a premium underlayment product (e.g., GAF Bituthene, Owens Corning WeatherLock, or equivalent) rated for high-wind and moisture exposure. Budget an extra $200–$400 for upgraded underlayment vs. basic felt. San Bruno inspectors don't mandate a specific brand, but they do verify that the product is rated for the wind speed and that installation matches the manufacturer's specs and the plan.

Flood-zone considerations and permit delays in San Bruno

San Bruno's geography puts portions of the city in FEMA-mapped flood zones (A and AE zones along the bay shoreline and creek corridors). If your property is in one of these zones, the roof permit might require cross-referencing with the city's Flood Development Permit process. Check your property's flood zone status on the FEMA Flood Insurance Rate Map (search 'San Bruno FIRM' online or ask your insurance agent). If you're in a flood zone, the city's plan-review staff will flag the permit and route it to the planning department, adding 1–2 weeks to approval.

Properties in flood zones don't face a permit denial for roof replacement, but the city requires documentation that the new roof meets flood-resistant material standards (CBC Section 1612). Asphalt shingles and metal roofing are both compliant; concrete tile is acceptable. The city may also require an elevation certificate if your home is in an AE zone and you're modifying the roof height or structure — this is rare for straightforward reroofs but can add 2–3 weeks if needed. Ask the contractor to confirm flood-zone status before application submission.

If your property is in a designated Flood Plain Management Zone or within 100 feet of a creek, San Bruno's Public Works Department may require a separate review. Budget an extra 2 weeks and $200–$500 in administrative processing for flood-zone permits. Most roof-only replacements are approved, but the bureaucracy moves slower in flood-mapped areas.

Common questions