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CRC R301 — Marin Wind & Seismic Loads

Updated May 18, 2026
Residential design loads for Marin County: wind exposure C, seismic design category D2, ground snow 0 psf.

Per California Residential Code Section R301 as adopted by Marin County, all new single-family dwellings must be designed for: wind exposure category C, seismic design category D2 (high seismicity per ASCE 7 mapping for the Hayward-Rodgers Creek fault system), and ground snow load 0 psf except for elevations above 1500 ft where 10 psf applies. Reference: 2022 CRC R301.2.1, R301.2.2.

TAGS
marinresidentialwindseismicCRC
DETAILS
edition
2022
adopted by
["ca-marin","ca-marin-county"]
code system
CRC
confidence tier
primary
jurisdiction label
Marin County, CA
SOURCES
🔗https://codes.iccsafe.org/codes/california/CARC2022P1
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