Accessory Structures in Jefferson County, AL (2026)
4 county-level rules, plus city-specific rules for 3 cities in Jefferson County, Alabama.
Verified from official government sources
ADU Rules
Jefferson County allows one accessory dwelling unit per lot, but Zoning Resolution Section 1207 boxes it in tightly: it must share utilities with the main house, sit in the rear yard if detached, match the principal home's architecture, and stay capped at 40% of that home's square footage.
Jefferson County ADU Zoning Requirements
Significant RestrictionsJefferson County Zoning Resolution § 1207
Accessory Dwelling Units (ADUs) where allowed by right or Special Use Permit, shall adhere to the following requirements: a. One accessory dwelling unit (ADU) or guest house is permitted on each lot developed with a primary residence. c. ADUs shall share utility services and meters with the primary structure. d. Each ADU shall contain no more than one kitchen, at least one bathroom, and no more...
ADU Owner Occupancy
An accessory dwelling unit in unincorporated Jefferson County cannot be rented out to the public. Zoning Resolution Section 1207(b) restricts ADU occupancy to members of the property owner's family who live in the unit, and the county requires a sworn affidavit confirming that relationship before occupancy is allowed.
Jefferson County ADU Family-Occupancy Rule
Significant RestrictionsJefferson County Zoning Resolution § 1207(b)
Occupancy of the ADU shall be limited to members of the family, as defined herein, that reside in the detached dwelling unit on the lot. An affidavit will be required.
Shed & Carport Rules
A shed or other accessory building in unincorporated Jefferson County must sit behind the main house and at least 5 feet off the side and rear property lines. Section 1101 of the county Zoning Resolution sets that standard for every district except larger A-1 agricultural lots and certain R-G and R-T residential zones.
Jefferson County Accessory Building Setbacks
Some RestrictionsJefferson County, AL Zoning Resolution § 1101 (Setbacks for Accessory Buildings)
Setbacks for Accessory Buildings. Incidental or accessory buildings (not for occupancy, commercial or industrial use) shall be located to the rear of the principal building (except in A-1 (Agriculture) Districts on properties containing more than one (1) acre); shall be not less than five (5) feet from any side and/or rear property line (except as provided in R-G (Single Family) and R-T (Reside...
Tiny Homes
Jefferson County's Zoning Resolution defines a Tiny Home as a site-built detached dwelling of 400 square feet or less, excluding lofts, built to the county's Building Code. Tiny homes are a listed permitted use in the R-5(A) and R-5(B) mobile-home districts, and Section 1214 allows one as temporary housing during construction if it meets accessory-structure setbacks.
Jefferson County Tiny Home Zoning Rules
Some RestrictionsJefferson County Zoning Resolution, Article 3 (Definitions) & § 1214
Tiny Home: A site-built single family detached dwelling that is 400 square feet or less, excluding lofts, that complies with the requirements of the adopted Building Code of Jefferson County, Alabama. [...] For a period not to exceed one (1) year, a camper, recreational vehicle, mobile home, or tiny home shall be allowed to be placed on a property during construction of a single-family dwelling...
Accessory Structures by City in Jefferson County
3 cities in Jefferson County have their own accessory structures rules. Each link goes to that city's dedicated page with code citations.
All Jefferson County ordinances
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