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.
New construction must comply with CBC Section 2308.3 anchor-bolt spacing (typically 1/2-inch bolts at 6 feet on center, max 12 inches from each end of plate, with 3-inch square plate washers in SDC D and above). Voluntary retrofits of pre-1980 homes follow CEBC Appendix Chapter A3 'Earthquake Hazard Reduction in Existing Wood-Frame Residential Buildings' — adding sill-plate anchors, cripple-wall plywood bracing, and hold-downs. The California Earthquake Authority's Brace + Bolt program offers up to $3,000 grants to eligible San Leandro homeowners; the City Building & Safety Division issues over-the-counter permits for prescriptive retrofits using the Plan Set A documents. Mandatory retrofits currently apply only to soft-story multi-family buildings under SLMC 7-5 Article 16; single-family foundation bolting remains voluntary unless triggered by major remodel.
New construction without conforming anchor bolts will fail framing inspection and cannot proceed. Voluntary retrofits done without a permit may violate SLMC 7-5; the City can require demolition of unpermitted work or after-the-fact permits at double fees.
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