Napa County, CA Animal Ordinances: Chickens & Livestock (2026)

Chapter 6.18 of the Napa County Code was originally adopted in 2013 as Ordinance 1381 (allowing up to 25 roosters per acre / 100 per parcel) and was substantially tightened by an ordinance adopted by the Board of Supervisors on December 16, 2025 with an effective date of February 1, 2026. The revised Section 6.18.030 caps roosters at zero on parcels under one-half acre, one rooster on parcels between one-half and one and one-half acres, and a maximum of four roosters on parcels greater than one and one-half acres. The amendment redefines 'rooster' as any male chicken six months or older (down from twelve months). Section 6.18.045 exempts commercial agricultural producers, public/private schools registered with the California Department of Education, government-operated animal shelters, FFA/4-H projects, and approved poultry exhibitors. All roosters must be provided with continuous access to potable water, weather-resistant shelter, and an enclosure large enough to fully extend both wings and turn in a complete circle without touching the sides; enclosures must be set back a minimum of 50 feet from any adjacent dwelling, kept clean and in good repair, and roosters may not be restrained by tether. Hens, other poultry and livestock are governed by the zoning code (Title 18, including section 18.08.040 Agriculture and Chapter 18.108) rather than by Title 6.