Foundation Anchoring: Berkeley vs San Leandro
How do foundation anchoring rules compare between Berkeley, CA and San Leandro, CA?
Berkeley and San Leandro have similar restriction levels.
Berkeley, CA
Alameda County
Berkeley enforces foundation anchoring (sill-plate bolting) and cripple-wall bracing for existing single-family wood-frame houses through Article 6 of BMC Chapter 19.28 (Repairs to Existing Buildings) and the city's adoption of the California Existing Building Code Appendix Chapter A3. Anchoring is mandatory when a substantial structural repair, addition, or change-of-occupancy triggers compliance, and is strongly encouraged for all pre-1980 homes given Berkeley's Hayward Fault exposure.
View full Berkeley rules →San Leandro, CA
Alameda County
San Leandro adopts the 2022 California Building Code through SLMC Title 7 Chapter 7-5. CBC Section 2308 (conventional light-frame construction) and Appendix Chapter A3 of the California Existing Building Code govern bolting wood-framed homes to their foundations. The City is in Seismic Design Category D and E due to the adjacent Hayward Fault.
View full San Leandro rules →Key Facts Comparison
| Fact | Berkeley | San Leandro |
|---|---|---|
| Code Section | BMC Ch. 19.28 Art. 6; CEBC App. A3 | SLMC 7-5 adopting CBC 2308 and CEBC App. A3 |
| Voluntary Permit | Over-the-counter at Berkeley Building & Safety | - |
| Prescriptive Standard | CEBC Appendix A3 (no engineer stamp required) | - |
| Grant Available | CA Earthquake Brace + Bolt up to $3,000 | - |
| Most Vulnerable Homes | Pre-1980 wood-frame with raised foundation | - |
| Bolt Spacing (new) | - | 1/2-in bolts at 6 ft o.c., 3-in plate washers in SDC D+ |
| Retrofit Standard | - | CEBC Appendix Chapter A3 (Plan Set A) |
| Grant Program | - | CEA Brace + Bolt (up to $3,000) |
| Mandatory? | - | No (voluntary for single-family) |
Highlighted rows indicate differences between cities.
Berkeley FAQ
Is foundation bolting mandatory for Berkeley homes?
Not by itself — there is no standalone retrofit deadline for single-family homes. But BMC 19.28 Art. 6 requires anchoring when a substantial repair, addition, or change of occupancy triggers Existing Building Code compliance, and CEBC Appendix A3 must be followed.
Do I need a structural engineer to bolt my house?
No, if you use the prescriptive CEBC Appendix A3 standard. Berkeley issues over-the-counter permits for A3 retrofits. Engineered designs are only needed for non-standard houses or hillside foundations.
Are grants available?
Yes. The California Residential Mitigation Program's Earthquake Brace + Bolt program offers up to $3,000 toward a qualifying Berkeley retrofit. Berkeley is one of the highest-priority Brace + Bolt ZIP codes due to the Hayward Fault.
San Leandro FAQ
Is foundation bolting mandatory for San Leandro homes?
No. Single-family foundation bolting is voluntary in San Leandro, but is strongly recommended given the Hayward Fault crosses the eastern edge of the city. Bolting is only mandatory when triggered by a substantial remodel or new construction under SLMC 7-5 / CBC 2308.
Can I get a grant to bolt my San Leandro foundation?
Yes — the California Earthquake Authority's Brace + Bolt program offers up to $3,000 to eligible homeowners, including in San Leandro ZIP codes 94577, 94578, and 94579. The City of San Leandro issues a streamlined Plan Set A permit for the retrofit.
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