Landscaping Rules in Napa, CA (2026)
7 verified landscaping rules for Napa, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Grass Height Limits
Grass and weed height in the City of Napa is regulated under the Weed and Rubbish Abatement provisions of the Municipal Code (Title 8, Chapter 8.24), administered by the Napa Fire Department Fire Prevention Bureau through the annual Weed Abatement Program. All weeds, thistles, rank grass, brush, berry vines, and dead or dying trees on private property (including the adjoining sidewalk area) and on streets and alleys are declared public nuisances. The City requires weeds and grass to be cut to a maximum height of four inches and combustible debris cleared 30 feet from any structure, with abatement work completed by June 1 each year and maintained throughout fire season.
Napa CA Grass Height and Weed Abatement Standard
Some RestrictionsTree Trimming
Tree trimming in the City of Napa is governed by Chapter 12.44 (Public Trees and Plants) for street and city trees and Chapter 12.45 (Trees on Private Property) for Protected Native Trees and Significant Trees. Pruning a Protected Native Tree branch larger than four inches in diameter, or removing more than 10% of live foliage in any one-year period, requires a permit from the Director of Parks and Recreation Services. Street-tree pruning requires a permit from Parks and Recreation Services at 1500 Jefferson Street. California follows common-law self-help for trimming a neighbor's overhanging branches to the property line.
Napa CA Tree Trimming Rules and Permit Triggers
Some RestrictionsCal. Pub. Res. Code Section 4291(2)-(3)
Remove that portion of a tree that extends within 10 feet of the outlet of a chimney or stovepipe. (3) Maintain a tree, shrub, or other plant adjacent to or overhanging a building free of dead or dying wood.
Tree Removal & Heritage Trees
Tree removal in the City of Napa is governed by Chapter 12.45 (Trees on Private Property) for Protected Native Trees and Chapter 12.44 (Public Trees and Plants) for street and city trees. Removal of any Protected Native Tree - including Valley Oak, Coast Live Oak, Black Oak, California Bay, or Black Walnut at 12-inch DBH; Blue Oak at 6-inch DBH; or Coast Redwood at 36-inch DBH - on qualifying lots is prohibited without a permit from the Tree Advisory Commission. Routine removal of dead, diseased, or hazardous trees that are not Protected Natives generally does not require a Napa permit. Street-tree removal requires Public Works/Parks and Recreation Services approval.
Napa CA Tree Removal Rules
Heavy RestrictionsWeed Ordinances
Weed control in the City of Napa operates locally under the Weed and Rubbish Abatement provisions of the Municipal Code (Title 8), with weeds, thistles, rank grass, brush, and berry vines declared public nuisances and a four-inch height standard enforced by the Napa Fire Department by June 1 each year. State law overlays the local rule: the California Department of Food and Agriculture maintains noxious-weed ratings under the California Code of Regulations, and the Napa County Agricultural Commissioner enforces noxious-weed quarantines. Pesticide application by commercial applicators requires a California Department of Pesticide Regulation license.
Napa CA Weed and Noxious Vegetation Rules
Some RestrictionsCal. Food & Agric. Code Section 5004
"Noxious weed" means any species of plant that is, or is liable to be, troublesome, aggressive, intrusive, detrimental, or destructive to agriculture, silviculture, or important native species, and difficult to control or eradicate, which the director, by regulation, designates to be a noxious weed.
Water Restrictions
Water restrictions in the City of Napa are codified in Chapter 13.09 (Water Conservation Regulations) and Chapter 13.10 (Water Shortage Regulations) of the Municipal Code. Permanent rules prohibit irrigation between 10 a.m. and 5 p.m., irrigation during rain or within 48 hours after measurable rainfall, runoff onto pavement, hosing driveways or sidewalks with potable water, and washing vehicles without a shutoff nozzle, and require leak repair within 30 days. Stage-based shortage regulations may limit outdoor irrigation to two days per week (odd addresses Tuesday and Friday, even addresses Monday and Thursday). California Water Code §365 et seq. and State Water Board emergency regulations control statewide drought declarations.
Napa CA Water Restrictions and Outdoor Irrigation Rules
Heavy RestrictionsCal. MWELO (Model Water Efficient Landscape Ordinance)
All local agencies must adopt, implement, and enforce the MWELO or a local Water Efficient Landscape Ordinance (WELO) that is at least as effective as the MWELO. Usually, local agencies that adopt WELOs create a more stringent ordinance than MWELO.
Native Plants
The City of Napa does not mandate native-plant landscaping on existing residential property, but California's Model Water Efficient Landscape Ordinance (MWELO) at 23 CCR §490 et seq. requires water-efficient design (often native or low-water Mediterranean species) for new and rehabilitated landscapes meeting size thresholds. Napa's Cash for Grass and Smart Rebates programs through Bay Area Water Supply and Conservation Agency provide rebates for converting turf to drought-tolerant or native landscaping. AB 1572 phases out potable-water irrigation of nonfunctional turf on nonresidential property by 2027 and on residential property by 2031.
Napa CA Native Plants, MWELO, and Cash for Grass
Few RestrictionsCal. MWELO — Purpose
Landscaping should be valued beyond the aesthetic because landscapes replace habitat lost to development and provide many other related benefits such as improvements to public health and quality of life, climate change mitigation, energy and materials conservation and increased property values.
Composting
Backyard composting in the City of Napa is permitted and encouraged. Curbside collection of organic waste is mandatory under California SB 1383 (Public Resources Code §42652 et seq.) and provided by Napa Recycling and Waste Services. The brown compost cart accepts all food scraps (including meat, bones, dairy), soiled paper, yard waste, garden prunings, and wood branches up to six inches in diameter. SB 1383 requires periodic route reviews and contamination follow-up. Free home compost-bin workshops and discounted bins are offered through the Napa Recycling and Composting Facility.
Napa CA Backyard Composting and SB 1383 Organic Waste
Some RestrictionsCal. SB 1383 (2016) / Cal. Pub. Res. Code Sections 42652 et seq.
The California Integrated Waste Management Act of 1989, which is administered by the Department of Resources Recycling and Recovery, establishes an integrated waste management program that requires each county and city and county to prepare and submit to the department a countywide integrated waste management plan. The bill would require the department, in consultation with the state board, to ...
Looking for Napa County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Napa city rules.
Landscaping Rules in Napa County →