Addition

San Diego charges development impact fees on top of building permits for new homes and additions, and the amount can swing by tens of thousands by neighborhood.
San Diego's setback, height, and floor area ratio rules decide how close you can build and how large. See the exact RS zone numbers from the Municipal Code.
San Diego bases certain permit fees on a published valuation schedule, not your contract price. Here's how the city calculates it, with the real rate tables.
San Diego's Information Bulletin 140 sets energy, structural and stormwater rules for single-story additions and remodels. Here's what applies in 2026.
San Diego requires a geotechnical soils report for additions on fill or expansive soil. Here's exactly when IB-141 applies and what else your plans need.
California's 2025 Energy Code took effect January 1, 2026 and covers remodels, additions and new homes in San Diego. Here's what it means for your project.
A San Diego grading permit expires after 24 months. Here's the extension window, fees, and exactly what happens if it lapses mid-addition or new build.
San Diego caps most Coastal Zone buildings at 30 feet under Proposition D, with no staff-level exceptions. Here's what that means for your home addition.
Independent 2025 Cost vs. Value data for San Diego: what primary suite, bathroom and deck additions actually cost, and what recoups the most at resale.
A home addition in San Diego almost always needs the plan-check permit, not the no-plan path. See the fee math by size, coastal rules and homeowner protections.

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