Accessory Structures in Birmingham, AL (2026)
9 verified accessory structures rules for Birmingham, Alabama, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Birmingham allows Accessory Dwelling Units in multiple residential zones. ADUs are typically limited to 800-1,000 sq ft or 40-50% of the primary residence. They must be within an accessory structure with cooking, sleeping, and sanitation facilities.
Birmingham Accessory Dwelling Unit (ADU) Rules
Some RestrictionsADU Permits
Birmingham regulates accessory dwelling units (ADUs) through the Birmingham Zoning Ordinance (maintained separately from the General Code) and general building requirements in Code of Ordinances Title 1 Chapter 6 (Buildings). Alabama is a Dillon Rule state with no statewide ADU preemption — local zoning controls. ADUs require a building permit through the Birmingham Department of Planning, Engineering and Permits and must comply with the International Residential Code adopted by the Alabama Building Commission and the City.
Birmingham Accessory Dwelling Unit Permits (Zoning Ordinance + Code Ch. 6)
Some RestrictionsADU Impact Fees
Birmingham does not impose a general residential impact fee on accessory dwelling units. Alabama law does not broadly authorize municipal residential impact fees outside specific statutory grants. ADU costs include standard building, electrical, plumbing, and mechanical permit fees through the Birmingham Department of Planning, Engineering and Permits plus Birmingham Water Works Board and Alabama Power tap or capacity fees if a new service is required.
Birmingham ADU Impact Fees (No General Residential Impact Fee)
Few RestrictionsADU Owner Occupancy
The Birmingham Zoning Ordinance does not impose an explicit citywide owner-occupancy mandate on every ADU, but accessory living quarters in low-density Residence districts (R-1, R-2, R-3) are typically permitted only for family members or domestic employees of the household occupying the principal dwelling. Rental of an ADU to an unrelated tenant generally requires higher-density residential zoning. Alabama has not preempted local ADU rules.
Birmingham ADU Owner-Occupancy Practice
Some RestrictionsADU Rental Restrictions
Long-term rental of a Birmingham ADU generally requires R-5 or higher residential zoning because R-1 through R-4 districts treat the accessory dwelling as incidental to the main dwelling. Short-term rentals under 30 days are regulated by the Birmingham General Code Title 5 (Business Licenses) and the city lodgings tax provisions, requiring a business license and collection of city, county, and state lodgings taxes. Alabama has not preempted local STR rules.
Birmingham ADU Rental Restrictions and STR Rules
Some RestrictionsShed Rules
Small sheds under 200 sq ft in Birmingham generally do not require a building permit. All structures must comply with zoning setbacks.
Birmingham Shed & Outbuilding Rules
Some RestrictionsGarage Conversions
Garage conversions in Birmingham require building permits and must meet code standards for habitable rooms. ADU conversions follow the city's accessory dwelling regulations.
Birmingham Garage Conversion Rules
Some RestrictionsCarport Rules
Birmingham regulates carports under Appendix D (Zoning Ordinance), Title 2 Article VI Section 20 and the city Building Code. A carport in any yard other than the rear yard must be attached to the principal dwelling and built of compatible materials. Rear-yard accessory structures must sit at least three feet from any side or rear lot line and may not occupy more than 30 percent of the required rear yard.
Carport Rules in Birmingham
Some RestrictionsTiny Homes
Birmingham's Zoning Ordinance (Appendix D, Title 1 Article III Section 9) bars accessory buildings from being used for dwelling purposes other than by domestic servants employed on the premises. Tiny homes on a foundation must therefore be permitted as a primary dwelling that meets the underlying district's lot, setback, and IRC standards rather than as a backyard ADU.
Tiny Home Rules in Birmingham
Heavy RestrictionsLooking for Jefferson County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Birmingham city rules.
Accessory Structures in Jefferson County →