Yes, backyard chickens are generally legal in Washington, but compliance with local ordinances and state agricultural guidelines is mandatory. Municipal codes and county health departments impose restrictions on flock size, coop placement, and sanitation to mitigate nuisance and disease risks. Recent 2026 amendments to the Washington State Department of Agriculture’s poultry regulations further clarify biosecurity standards for small-scale flocks.
Key Regulations for Keeping Backyard Chickens in Washington
- Flock Size Limits: Most jurisdictions cap backyard flocks at 6–12 hens, excluding roosters, which are often prohibited due to noise ordinances. Urban areas like Seattle and Spokane enforce stricter limits (e.g., 4 hens) under municipal codes adopted in 2025.
- Coop and Run Specifications: Structures must be predator-proof, at least 20 feet from neighboring residences, and comply with setback requirements. King County’s 2026 update mandates elevated coops (minimum 2 feet off the ground) to prevent rodent infestations.
- Sanitation and Biosecurity: Regular waste removal and disinfection are required under Washington State Department of Agriculture (WSDA) guidelines. Flocks exceeding 50 birds trigger additional WSDA inspections for avian influenza compliance, per 2026 federal alignment protocols.
Violations may result in citations or forced flock culls, particularly in areas with active disease outbreaks. Prospective owners should consult their county’s planning department and the WSDA’s Poultry Health Program for jurisdiction-specific updates.