Landscaping Rules in Walnut Creek, CA (2026)
5 verified landscaping rules for Walnut Creek, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Grass Height Limits
Walnut Creek's Public Nuisance ordinance treats overgrown grass and weeds exceeding roughly 12 inches as a nuisance when they create fire hazards or harbor vermin. In fire hazard areas, ConFire requires grass to be maintained below 4 inches during fire season under PRC 4291 defensible space rules.
Landscaping: Grass Height
Some RestrictionsTree Removal & Heritage Trees
Walnut Creek has one of the Bay Area's strongest tree preservation ordinances. Removal of any Protected Tree — including Heritage Trees, native oaks, and trees of significant size on private property — requires a Tree Removal Permit from the Planning Division. Unauthorized removal can result in fines up to $10,000 per tree plus replacement requirements.
Landscaping: Tree Removal
Heavy RestrictionsWeed Ordinances
Noxious weeds on the Contra Costa County Agricultural Commissioner's list — including yellow starthistle, artichoke thistle, and various broom species — must be controlled by property owners under California Food & Ag Code Section 5004. Walnut Creek Code Enforcement coordinates with the county on abatement in open space interface areas.
Landscaping: Weeds Noxious
Some RestrictionsWater Restrictions
Walnut Creek is served by East Bay Municipal Utility District (EBMUD) and Contra Costa Water District (CCWD), both of which enforce permanent statewide water waste prohibitions plus district-specific watering schedules. Outdoor irrigation runoff, hosing hard surfaces, and watering within 48 hours of rain are always prohibited.
Landscaping: Water Restrictions
Heavy RestrictionsCal. Code Regs. tit. 23, § 490 et seq. (Model Water Efficient Landscape Ordinance)
Model Water Efficient Landscape Ordinance Model Water Efficient Landscape Ordinance Low water using plants, mulch, and efficient irrigation save water while making habitat for pollinators. DWR/2015 About 40% of the water Californians use at home is used outdoors. Large water savings can be gained by efficient landscape design, installation, management, and maintenance. This is accomplished by c...
Native Plants
Walnut Creek encourages drought-tolerant and xeriscape landscaping. The city follows California's Model Water Efficient Landscape Ordinance (MWELO) for new projects and EBMUD offers Lawn Conversion rebates. CA Civil Code Section 53087.7 prevents HOAs from prohibiting low-water landscaping during drought.
Landscaping: Xeriscape Rules
Few RestrictionsLooking for Contra Costa County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Walnut Creek city rules.
Landscaping Rules in Contra Costa County →