New construction · San Mateo
Do I need a soils report for new construction in San Mateo?
A geotechnical (soils) report is effectively required for new construction in San Mateo. City of San Mateo Community Development Department — Building Division uses it to size the foundation, set drainage, and confirm compliance with California seismic provisions on the parcel.
What changes the answer in San Mateo.
Alluvial fan and (bayside) Bay Mud / engineered fill; geotech standard. San Andreas Fault zone west in the hills; CGS liquefaction zones in bayside Shoreview and parts of older fill areas.
- Alluvial fan and (bayside) Bay Mud / engineered fill; geotech standard.
- San Andreas Fault zone west in the hills; CGS liquefaction zones in bayside Shoreview and parts of older fill areas.
- HR overlay in western neighborhoods adds slope-band density and Architectural Review.
- Shoreview and bayside parcels in FEMA SFHA — verify on FEMA MSC.
Source-backed note
California Geological Survey publishes seismic-hazard and liquefaction maps; parcels inside designated zones require a site-specific geotechnical investigation under CBC §1803.
Reference: California Geological Survey — Seismic Hazard Zones — California Department of Conservation
Local authority: City of San Mateo Community Development Department — Building Division
Get a San Mateo-specific answer for your parcel.
Send us the address and we'll respond with a feasibility note that cites City of San Mateo Community Development Department — Building Division and the parcel's actual constraints — not a generic checklist.
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