Home Additions in Danville, CA
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What a Danville Addition Submittal Includes
- Three plan sets, and a plot plan showing trees 10 inches or larger if work extends beyond the footprint.
- Stamped structural calculations.
- Title 24 energy forms and CALGreen mandatory measures.
- A geotechnical report and the engineer’s letter.
- A San Ramon Valley Fire Protection District approval letter before issuance, and its final letter before the Town final. The fire district reviews any addition of square footage.
- Central San review and stamp before applying, for additions beyond the existing footprint.
- San Ramon Valley Unified School District fees for residential additions over 500 sq ft.
Addition Work
Ridgelines, Trees and Heritage Resources
- Scenic Hillside and Major Ridgeline rules: no building within 100 vertical feet of a major ridgeline without an exception, a hillside grading permit at 25 cubic yards or more, height limits of 28 feet (24 near a ridgeline) and muted colors.
- Trees: native oaks, bay, buckeye, sycamore, madrone, white alder and London plane with a 10-inch trunk (20 inches combined for multiple trunks) are protected, and any tree 36 inches or larger is a heritage tree.
- Heritage resources: the Heritage Resource Commission reviews projects affecting the Town’s designated heritage resources and the Historic Downtown.
- Design Review Board: reviews site design, architecture and landscaping, meeting Thursdays at 5 p.m. Owners within 750 feet are notified for hearing and administrative items.
Where to Start
- Confirm zoning and setbacks with the Planning Division.
- Look up your project type in the Town’s Permit Directory for submittal requirements.
- Get Central San review and stamp before you apply for additions beyond the existing footprint, decks, ADUs, carports, generators and ground-mounted solar.
- Complete the building permit application and the Outside Agency Checklist.
- Submit in person or online.
- Obtain a San Ramon Valley Fire Protection District approval letter before permit issuance, and its final letter before the Town final.
Town of Danville Permit Center & Planning Division
500 La Gonda Way, Danville, CA 94526
Town offices (925) 314-3388 · Permit Center (925) 314-3330 · Planning (925) 314-3310
Applications can be submitted in person or through the Town’s Online Permit Center / Citizen Access Portal. Inspections: danville.ca.gov/CAP or (925) 314-3333, before 3 p.m. for the next business day.
500 La Gonda Way, Danville, CA 94526
Town offices (925) 314-3388 · Permit Center (925) 314-3330 · Planning (925) 314-3310
Applications can be submitted in person or through the Town’s Online Permit Center / Citizen Access Portal. Inspections: danville.ca.gov/CAP or (925) 314-3333, before 3 p.m. for the next business day.
Danville’s 50% rule: if a remodel removes or replaces at least 50% of the wall length and 50% of the roof within one year, the whole project must meet current new-construction codes, including fire district sprinkler requirements.
Explore More
Other Danville services: ADUs · Bathrooms · Kitchens · New Homes · Danville overview
Same service nearby: Alamo · San Ramon · Walnut Creek
See home additions and second stories.
Danville Home Additions FAQ
Does the fire district review additions in Danville?
Yes. The San Ramon Valley Fire Protection District reviews any addition of square footage and issues approval letters.
Are school fees due on an addition?
Additions over 500 sq ft pay San Ramon Valley Unified School District fees.
How close can I build to a ridgeline?
Not within 100 vertical feet of a major ridgeline without an exception.
Is Blackhawk part of Danville?
No. Blackhawk is unincorporated, so Contra Costa County issues its permits.