Burlingame
Burlingame wrote SB 9 into its code as a Two-Unit Residential Overlay on R-1 lots, with its own height rules and one notable limit on ADUs after a split. Here is what that means for an owner or a buyer.
Read the guide →San Mateo
San Mateo has written its own SB 9 standards into the municipal code and adds tenant protections on top of state law. Both matter if you own a single-family lot or a rental here.
Read the guide →Foster City
Foster City has a dedicated SB 9 chapter with its own height, frontage, and utility rules for R-1 lots. Here is how a two-unit project or lot split works here.
Read the guide →Belmont
Belmont's ADU ordinance dates to 2020, and the state flagged it in late 2025. If you're planning more than one unit on a single-family lot, that review is the most useful thing to read.
Read the guide →San Carlos
San Carlos calls SB 9 homes Urban Infill Units and has a permanent ordinance with its own height and parking standards. Its ADU ordinance was flagged by the state in 2026.
Read the guide →Redwood City
Redwood City added a Tenant Protection Ordinance in 2026 and publishes its ADU permit fees up front. If you own a rental or want to add a unit, both are worth knowing before you start.
Read the guide →Menlo Park
Menlo Park adopted a new ADU ordinance in 2026 and is rewriting its SB 9 chapters. The rules are moving, so here's where they stand and what to check.
Read the guide →Palo Alto
Palo Alto caps split lots at two units and layers its own renter protections on top of state law. If you own here or are buying a rental, both change the math.
Read the guide →Mountain View
Mountain View has its own voter-approved rent stabilization law with a later cutoff date than most, and applies SB 9 together with its ADU standards on R1 lots.
Read the guide →Los Altos
Los Altos approves ADUs with a building permit only and keeps a list of pre-approved plans. Here is what owners and buyers should know.
Read the guide →Sunnyvale
Sunnyvale publishes clear ADU counts and an 800-square-foot line between a fast permit and a slower one. Here is how that works on single-family and multifamily lots.
Read the guide →Cupertino
Cupertino has a dedicated SB 9 ordinance with a ministerial permit path, and the state flagged its ADU ordinance in 2025. Here is what that means for a lot or a purchase.
Read the guide →Santa Clara
The City of Santa Clara has published its own reading of where SB 9 applies, and it's narrower than many owners assume. Here is what that means for a lot or a purchase.
Read the guide →Campbell
Campbell publishes a detailed ADU bulletin with sizes, heights, and parking spelled out. Here is what an owner or buyer should know.
Read the guide →San Jose
San José has its own Apartment Rent Ordinance for older buildings and allows ADUs alongside an SB 9 duplex. Here is how the rules stack up for owners and buyers.
Read the guide →Los Gatos
Los Gatos says its own SB 9 ordinance doesn't comply with state law, is rewriting its ADU rules, and has a local rent dispute program for larger rental properties.
Read the guide →Saratoga
Saratoga's own code allows more on a single-family lot than SB 9 requires, which changes how a split or an addition pencils out.
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