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CalGreen Tier 1 — Marin Water Efficiency

Updated May 18, 2026
CalGreen mandates water-efficient fixtures, drought-tolerant landscaping; Marin Water has additional restrictions.

CalGreen (CA Code of Regulations Title 24 Part 11) mandates water-efficient indoor fixtures and drought-tolerant landscaping for new construction in Marin County. Local Marin Water (MMWD) restrictions add: max 1.0 GPM lavatory faucets, drip-only irrigation outside the dripline, no new lawn over 25% of landscaped area. Stormwater retention per MCSTOPPP for sites larger than 2500 sf disturbance.

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