Landscaping Rules in Palo Alto, CA (2026)
8 verified landscaping rules for Palo Alto, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Grass Height Limits
Palo Alto requires property owners to maintain landscaping so it does not create a fire or pest nuisance. In the foothill Very High Fire Hazard Severity Zone, grass must be cut to 4 inches or less during fire season.
Palo Alto Grass Height Standards
Some RestrictionsTree Trimming
Palo Alto has one of the strictest tree ordinances in California. Heritage, protected, and street trees may not be pruned more than 25 percent without a permit from the Urban Forestry program under PAMC Chapter 8.04.
Palo Alto Tree Trimming Rules
Heavy RestrictionsCalifornia Public Resources Code § 4291 (defensible space — 100 feet around structures in state responsibility areas)
4291. (a) A person who owns, leases, controls, operates, or maintains a building or structure in the state responsibility area shall at all times do all of the following: (1) (A) Maintain defensible space of 100 feet from each side and from the front and rear of the structure, but not beyond the property line, except as provided in subparagraph (B). The amount of fuel modification necessary sha...
Tree Removal & Heritage Trees
Removing protected or street trees in Palo Alto requires a permit. Heritage trees and regulated oaks can only be removed with findings of hazard, disease, or undue hardship, and replacement trees are typically required.
Palo Alto Tree Removal Permit
Heavy RestrictionsWeed Ordinances
Palo Alto requires property owners to control weeds and dead vegetation that create fire hazards or public nuisances. Hillside parcels in the VHFHSZ face mandatory annual weed abatement inspections.
Palo Alto Weed Abatement
Some RestrictionsCalifornia Food and Agricultural Code § 5004 (noxious weed definition)
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. In determining whether or not a species shall be designated a noxious weed for the purpose...
Water Restrictions
Palo Alto enforces permanent water waste rules and activates drought-stage restrictions set by Valley Water and the State Water Board. AB 1572 bans potable irrigation of non-functional commercial turf.
Palo Alto Water Use Restrictions
Some RestrictionsCalifornia Department of Water Resources — Model Water Efficient Landscape Ordinance (MWELO)
The Model Water Efficient Landscape Ordinance (MWELO) is also referenced by Title 24, Part 11, Chapters 4 and 5 CalGreen Building Code. 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. Local agenci...
Rainwater Harvesting
Rainwater harvesting is legal and encouraged in Palo Alto. Rain barrels and small cisterns under 5,000 gallons do not require a permit, but larger systems and any indoor plumbing connection need review.
Palo Alto Rainwater Harvesting
Few RestrictionsNative Plants
Palo Alto encourages California native and low-water landscaping through its Bay-Friendly and sustainable landscaping programs. MWELO compliance applies to new landscapes, and rebates support lawn-to-native conversions.
Palo Alto Native Plant Landscaping
Few RestrictionsCalifornia Model Water Efficient Landscape Ordinance (MWELO)
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 choosing climate adapted plants, improving soil conditions, using, and maintaining high efficiency irrigation equipment and managing the irrigation schedule to fit the plants water needs as they are ...
Artificial Turf
Palo Alto permits artificial turf on private property subject to setbacks, drainage, and aesthetic rules. Front-yard installs typically need design review for streetscape compatibility.
Palo Alto Artificial Turf Rules
Some RestrictionsCalifornia Civil Code Section 4735
(a) Notwithstanding any other law, a provision of the governing documents or architectural or landscaping guidelines or policies shall be void and unenforceable if it does any of the following: (1) Prohibits, or includes conditions that have the effect of prohibiting, the use of low water-using plants as a group or as a replacement of existing turf. (2) Prohibits, or includes conditions that ha...
Looking for Santa Clara County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Palo Alto city rules.
Landscaping Rules in Santa Clara County →