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New construction · Redwood City

Do I need a soils report for new construction in Redwood City?

A geotechnical (soils) report is effectively required for new construction in Redwood City. City of Redwood City Community Development & Transportation 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 Redwood City.

Alluvium and (in Redwood Shores) Bay Mud / engineered fill; geotech-driven foundation design standard. The San Andreas Fault zone is west in the hills; CGS liquefaction zones touch the bayside Redwood Shores district.

  • Alluvium and (in Redwood Shores) Bay Mud / engineered fill; geotech-driven foundation design standard.
  • The San Andreas Fault zone is west in the hills; CGS liquefaction zones touch the bayside Redwood Shores district.
  • R-1-H zoning in Emerald Hills adds slope-band density, retaining-wall height limits, and Architectural Review.
  • Redwood Shores and bayside parcels are in FEMA SFHA — elevation certificates and freeboard requirements apply.

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 Redwood City Community Development & Transportation Department — Building Division

Get a Redwood City-specific answer for your parcel.

Send us the address and we'll respond with a feasibility note that cites City of Redwood City Community Development & Transportation Department — Building Division and the parcel's actual constraints — not a generic checklist.

Start a Redwood City consultationCall (818) 650-3197

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