Napa County, CA Ordinances (2026)

Short-term rentals are flatly prohibited in unincorporated Napa County. Napa County Code Section 18.104.410 bans transient commercial occupancies (rentals under 30 consecutive days) of…

Napa County does not publish guest-count, bedroom, or night caps for short-term rentals because the underlying use is prohibited. Any rental of a dwelling unit for less than 30…

In unincorporated Napa County, no building, structure, well, utility facility, or other improvement may be erected within the established road setback area, which is measured from the…

Napa County does not adopt a separate boundary-fence rule, so California Civil Code 841 controls: adjoining landowners share equally in maintaining the boundary and any…

A Special Fence Permit from the PBES Director is required when a proposed fence does not meet the height/location rules in section 18.104.270 or when a permitted fence will sit inside…

In AP, AW, RS, RM and PD zones, solid fences may be up to 4 ft in the front yard setback and up to 6 ft in side and rear yard setbacks, with see-through fencing allowed taller. Fences…

Napa County defines a fence broadly to allow wood, wire, stone, concrete, glass block or other construction, but in residential and agricultural zones any portion above 6 ft in side or…

Cottage food operations in Napa County are authorized under California's AB 1616 / Health & Safety Code section 113758 et seq. and are registered (Class A) or permitted (Class B) by…

Napa County Code 18.116.020(A) allows one wall-mounted, parallel-to-the-front-wall sign of up to one square foot displaying the occupant's name, address, and occupation without any…

Napa County Code 18.104.090 limits home occupations to the dwelling itself (no accessory buildings), confines them to 25% or less of the dwelling's gross floor area, restricts work to…

Napa County Code Section 18.104.180 ministerially permits Accessory Dwelling Units (ADUs, called 'second units') and Junior ADUs (JADUs) on legal lots zoned RS, RC, AW, or PD, with a…

Napa County Code Section 18.104.180 (per Ordinance 1456) expressly defines a 'second unit, detached' to include a second unit located within a detached garage or other accessory…

Per the California Building Code section 105.2 (adopted via Napa County Code Title 15, Chapter 15.12), one-story detached storage sheds with a floor area of 120 sq ft or less are…

Section 8.16.080 of the Napa County Code prohibits operating construction, drilling, repair, alteration or demolition tools and equipment in a manner that creates a noise disturbance…

Napa County's Noise Control Regulations (Chapter 8.16) set lower nighttime exterior and interior noise standards from 10:00 p.m. to 7:00 a.m., effectively functioning as nighttime…

In unincorporated Napa County, habitual barking and other animal noise is regulated through Chapter 8.16's general noise-disturbance prohibition rather than a dedicated barking-dog…

Section 8.16.080 of the Napa County Code prohibits loudspeakers, radios, televisions, musical instruments and similar devices from being operated in a manner that creates a noise…

The Napa County Airport Land Use Commission (ALUC) administers the Airport Land Use Compatibility Plan (ALUCP), which uses a 65 dB CNEL noise contour around Napa County Airport and…

Unincorporated Napa County does not have a stand-alone leaf-blower ban. Powered garden tools (leaf blowers, mowers, chainsaws) are regulated under the general property-line noise…

Napa County Code Chapter 8.36 (Fire Protection - Fire Hazard Abatement), as amended by Ordinance 1467, requires defensible space around all structures and treats unmaintained…

Napa County contains extensive Very High Fire Hazard Severity Zones across the Vaca Mountains, Howell Mountain, Mount Veeder, and the Mayacamas Range, mapped by CAL FIRE under the 2025…

Napa County Code Chapter 6.18 (Keeping of Roosters), as amended by Ordinance 1431 effective Feb. 1, 2026, prohibits roosters on parcels under 0.5 acre, allows 1 rooster on 0.5-1.5…

Napa County Code Chapter 6.12 (Beehives), as amended by Ordinance 1377, requires apiaries to use moveable-frame hives in sound condition and be screened from neighboring dwellings and…

Napa County Code Title 6 does not set a numerical limit on the number of dogs or cats a household in the unincorporated area may keep. Cat limits were discussed by the Board of…

Napa County does not ban any dog breed. California Food & Agricultural Code 31683 prohibits cities and counties from enacting breed-specific dog programs except for spay/neuter and…

Unincorporated Napa County has not adopted a local rent-stabilization or rent-control ordinance. The applicable cap is the California statewide Tenant Protection Act rent ceiling at…

Unincorporated Napa County has not adopted a local just-cause eviction ordinance; tenant protections in the unincorporated county are governed by California's statewide Tenant…

Napa County does not set a single numeric grass-height limit, but Chapter 8.36 declares as a public nuisance the presence of dry grass, weeds, brush, or other combustible vegetation…

Napa County Code Chapter 18.118 (Water Conservation Regulations for Landscape Design) implements the state Model Water Efficient Landscape Ordinance and requires a Landscape…

Napa County Code Chapter 8.36 requires property owners to maintain 100 feet of defensible space around structures, including pruning tree portions that extend within 10 feet of any…

Abandoned vehicles in unincorporated Napa County are addressed under California Vehicle Code Sections 22650-22711 (Removal of Parked and Abandoned Vehicles) and Napa County Code Title…

Napa County's Good Neighbor guidance directs that RVs, campers, boats, and trailers be stored on private property on paved surfaces, not on the street; under Napa County Code Section…

Napa County prohibits parking any vehicle on a county road for more than 120 consecutive hours under Napa County Code Section 10.08.150, and the California Vehicle Code authorizes…

Napa County has not adopted a stand-alone weight-based ordinance restricting commercial vehicle parking in residential districts; the controlling rules are California Vehicle Code…

Napa County has not adopted a county-wide 2 a.m.-6 a.m. overnight parking ban under California Vehicle Code Section 22507.5; the controlling rule is Napa County Code Section 10.08.150…

Unincorporated Napa County applies the California Swimming Pool Safety Act, which requires new and remodeled residential pools and spas to have at least two of seven…

Napa County Building Division requires a building permit for every residential pool or spa. Applications go through the Online Permit Center with a Residential Pool & Spa submittal…

In unincorporated Napa County, no person may engage in the business of peddler or solicitor without first obtaining a permit under the county's peddling-and-soliciting chapter, subject…

In unincorporated Napa County it is a public nuisance for anyone owning, leasing, or occupying premises to maintain them so as to be injurious to health, offensive to the senses, or an…

In unincorporated Napa County, any owner or occupant of premises where solid waste accumulates must place and keep garbage and other putrescent or litter-prone waste in proper storage…

In unincorporated Napa County it is unlawful to camp, occupy camp facilities, or use camp paraphernalia in designated areas, except as expressly allowed under the county's camping and…

In unincorporated Napa County it is unlawful to sponsor or conduct a special event or filming activity on public roadways without first obtaining a special event permit and complying…

Napa County protects agriculture: no properly conducted commercial agricultural activity, operation, or facility may be deemed a nuisance because of changed conditions in or around the…

Napa County adopts an expedited, streamlined permitting process for small residential rooftop solar energy systems, removing obstacles and encouraging property owners to install solar.

Napa County caps exterior noise at 45 dBA at night and 50 dBA by day at a neighboring rural home's property line, under Code Section 8.16.070. A data center's cooling equipment and…