Room Addition Permit Requirements in Granite Bay, CA
Granite Bay is an unincorporated community in Placer County with no city government; Placer County Building Services is the AHJ. As of Jan 1, 2026 the county enforces the 2025 California Building Standards Code including the 2025 CRC and Part 7 Wildland-Urban Interface Code. Some Granite Bay parcels fall in the WUI and require ignition-resistant construction.
By Joey, Founder · Last verified May 31, 2026 · How we research →
When you need a Addition permit
Any habitable-space addition requires a building permit, plus electrical and plumbing permits as applicable, issued by Placer County Building Services Division under the 2025 California Residential Code (Title 24 Part 2.5, based on the 2021 IRC). Plans showing framing, energy compliance, egress, and smoke and CO alarms are required. A California-licensed (CSLB) contractor is required for the work. Submit through the county e-permits portal at permits.placer.ca.gov. Placer County also enforces the 2025 California Wildland-Urban Interface Code (Title 24 Part 7); parcels in the WUI must use ignition-resistant exterior materials.
Room Addition Permit Costs: Granite Bay vs. Nearby
| City | Estimated Fee |
|---|---|
| Granite Bay | N/A |
| Los Angeles | $1,000 – $20,000 |
| Sacramento County | $200 – $2,000 |
| San Diego | $850 – $17,000 |
Fees shown are estimates based on local building code data. Actual fees may vary based on project scope and valuation. See all Granite Bay permit costs →
Zoning Considerations
Room additions typically require zoning review for setbacks, height limits, and lot coverage. Your addition must comply with your zoning district's building envelope requirements.
Estimated Project Timeline
Here's a typical timeline for a room addition project:
Timeline is based on the typical about 9 weeks permit processing time. Actual timelines vary by project complexity, completeness of application, and current department workload.
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Frequently Asked Questions
Contact the building department for current Room Addition permit fee information. Fees typically vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Room Addition projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for Room Addition permits is about 9 weeks. More complex projects may take longer if plan review is required.
Learn More About Room Addition Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Room Addition Guide →