San Ramon's Landscaping Rules: The Rules That Matter
Every city handles landscaping rules a little differently. In San Ramon, California, there are 5 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.
Weed Ordinances
Noxious weeds designated by the Contra Costa County Agricultural Commissioner under California Food and Agricultural Code Section 5004 must be controlled on private property. Common San Ramon targets include yellow starthistle, Italian thistle, French and Scotch broom, and artichoke thistle. Enforcement is handled by the county with city abatement backstop.
Key details: Fee: Contra Costa County Ag Commissioner enforces noxious weed controls per FAC §5004. Rule: Yellow starthistle, French/Scotch broom, and thistles are common targets. Rule: Owners of infested properties may receive county control orders. Authority: San Ramon can treat infestations as public nuisance under GC §39561. Rule: Volunteer opportunities available through EBRPD and Save Mount Diablo.
Contact your local code enforcement office for specific penalty information.
Grass Height Limits
San Ramon enforces weed and grass abatement under California Government Code Sections 39560-39588 and the municipal code. Overgrown vegetation over approximately 6 inches may be declared a public nuisance, especially as a fire hazard in VHFHSZ areas where CAL FIRE requires grass cut to 4 inches in Zone 2 defensible space.
Key details: Dry Grass Weeds: Dry grass and weeds over ~6 inches may be declared a public. Vhfhsz Properties Must: VHFHSZ properties must cut Zone 2 grass to 4 inches per PRC. Annual Srvfpd Weed: Annual SRVFPD weed abatement notices typically issued in April/May. Non-compliance Triggers City: Non-compliance triggers city abatement with costs as property lien. Green Irrigated Lawn: Green irrigated lawn not height-regulated; rule targets fire-hazard vegetation.
Contact your local code enforcement office for specific penalty information.
Native Plants
San Ramon encourages drought-tolerant landscaping under California's MWELO (Model Water Efficient Landscape Ordinance). New and renovated landscapes over 500 sq ft must meet Maximum Applied Water Allowance limits. EBMUD and DSRSD offer lawn replacement rebates. HOAs cannot prohibit water-efficient landscaping per Civil Code Section 4735.
Key details: Landscape Funding: TCSD districts may fund some areas. Note: Drought-tolerant and native planting strongly encouraged and MWELO-compliant. Note: EBMUD Lawn-to-Garden rebate ~$2/sf for turf conversion. Note: Civil Code §4735 voids HOA bans on water-efficient landscaping. Permit/License: Small residential conversions under 500 sf usually permit-free.
Contact your local code enforcement office for specific penalty information.
The rules around native plants in San Ramon lean permissive, but that does not mean anything goes.
Water Restrictions
San Ramon water service is provided by EBMUD and Dublin San Ramon Services District (DSRSD). Permanent statewide water waste rules under SWRCB prohibit runoff, watering within 48 hours of rain, and hosing hard surfaces. Local drought stages trigger day-of-week watering limits, typically 2-3 days per week during drought.
Key details: Water Districts: EBMUD serves western San Ramon; DSRSD serves Dougherty Valley/eastern areas. Statewide Bans: No runoff, no hosing hard surfaces, no watering 48 hrs post-rain. Drought Schedules: Drought stages trigger 2–3 day watering schedules with AM/PM windows. Penalties: Fines range from warnings to $500 plus flow restrictor for repeat offenders. New Construction: Landscaping >500 sf must comply with MWELO.
Contact your local code enforcement office for specific penalty information.
This is one of the stricter rules in San Ramon's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
Tree Removal & Heritage Trees
San Ramon's Tree Preservation Ordinance (Municipal Code Chapter D2-50) requires a permit to remove protected trees including native oaks, California bay, buckeye, and sycamore above specified trunk diameters. Removal of heritage trees and significant trees on private property without approval carries fines up to $1,000+ per tree and replanting requirements.
Key details: Legal Reference: Tree Preservation Ordinance at Municipal Code Chapter D2-50. Setbacks: Permit to remove protected natives above 8-12 inch DBH thresholds. Arborist Report Typically: Arborist report typically with application. Penalties: Unpermitted removal fines $1,000+ per tree plus 2:1 or 3:1 replacement. Street Trees City: Street trees are city property — require separate Public Works permit.
Contact your local code enforcement office for specific penalty information.
Compared to other cities, San Ramon takes a harder line on tree removal & heritage trees. The enforcement and penalty structure reflects that.
The Bottom Line
San Ramon is tougher than many cities when it comes to landscaping rules. Out of the 5 rules covered here, 2 are rated strict. If you are a homeowner, renter, or business owner in San Ramon, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.
These rules come from San Ramon's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.