Whether you can keep chickens or livestock in unincorporated Jeffco depends on your zone district. Most residential zones allow up to 6 chickens/ducks (no roosters) with a Miscellaneous Permit; larger residential and agricultural lots allow horses, cattle, and unlimited poultry.
Jefferson County's "Domestic Animals Permitted by Zoning" chart sets allowances by zone. In many residential zones (R-1A, R-2, R-3, MR-3), 6 chickens and/or ducks (no roosters) plus up to 2 beehives are allowed on single-family, duplex, and two-family lots only with a Miscellaneous Permit under the Urban Agriculture rules (Zoning Resolution Section 5). Suburban/mountain-residential and larger lots (SR, R-1, R-4) allow poultry in a coop up to 400 sq ft. Agricultural zones (A-1, A-2, A-35) meeting minimum lot size have no limit on poultry number for personal use.
Keeping chickens/livestock beyond what your zone allows, or without the required Miscellaneous Permit, is a zoning violation enforced by Planning & Zoning through notice, permit compliance, and abatement.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Jefferson County's chickens & livestock rules stack up against other locations.
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