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.
Alabama is a Dillon Rule state and has not enacted ADU legislation overriding local zoning. The Birmingham Zoning Ordinance defines accessory uses and permits accessory living quarters in lower-density Residence districts (R-1, R-2, R-3, R-4) as a use incidental to the principal single-family dwelling. The practical effect is that the principal dwelling must remain occupied as a single-family residence and the accessory unit must be used by family members, household guests, or domestic employees — converting both units to separate non-related rentals generally triggers a two-family-dwelling classification that requires R-5, R-6, or R-7 zoning or a use variance from the Board of Zoning Adjustment. Property owners seeking to rent both the main dwelling and the ADU to unrelated tenants typically pursue a Board of Zoning Adjustment use variance or a zoning map amendment through the Birmingham Planning Commission. There is no recorded deed-restriction requirement comparable to California Junior ADU rules. The Department of Planning, Engineering and Permits verifies use through the Certificate of Occupancy issued under Code Title 1 Chapter 6 and through complaint-driven code enforcement.
Operating an accessory dwelling as an independent rental in a single-family Residence district can be cited as a zoning violation under the Birmingham Zoning Ordinance, with code-enforcement orders requiring cessation of the rental use. Continued violation carries daily fines under the general penalty in Code Sec. 1-1-6. Repeat violators face Municipal Court prosecution.
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