ADU (Accessory Dwelling Unit) Permit in Birmingham (2026)
ADU (Accessory Dwelling Unit) permit requirements, fees, and process for Birmingham, AL. Find out if you need a permit and how to apply.
Yes, a ADU (Accessory Dwelling Unit) permit is required in Birmingham, AL.
A ADU (Accessory Dwelling Unit) permit is required in Birmingham, AL. The City of Birmingham Department of Planning, Engineering and Permits handles permit applications for Birmingham. Below you will find the current thresholds, fees, and process for obtaining a adu (accessory dwelling unit) permit in Birmingham.
When Is a Permit Required?
When a ADU (Accessory Dwelling Unit) Permit Is Required in Birmingham: All ADU construction
Permit Fees
ADU (Accessory Dwelling Unit) Permit Fees in Birmingham: $1,200–$5,500. Estimated timeline: 5-9 weeks.
Estimated timeline: 5-9 weeks
How to Get a ADU (Accessory Dwelling Unit) Permit in Birmingham
Verify whether your project meets the permit threshold in Birmingham: All ADU construction.
Prepare your permit application and plans. Contact the City of Birmingham Department of Planning, Engineering and Permits at https://www.birminghamal.gov/building-permits for required documentation.
Submit your application online at https://www.birminghamal.gov/building-permits or in person at the City of Birmingham Department of Planning, Engineering and Permits.
Pay the permit fee: $1,200–$5,500.
Wait for plan check approval. Estimated timeline: 5-9 weeks.
Schedule required inspections through https://www.birminghamal.gov/building-permits/inspections. All inspections must pass before project is finalized.
Important: Birmingham building permit required. BWW and Alabama Power connection fees for independent utilities.
City of Birmingham Department of Planning, Engineering and Permits
Phone: (205) 254-2677
Website: https://www.birminghamal.gov/building-permits
Online Permits: https://www.birminghamal.gov/building-permits
Hours: Mon-Fri 8:00am-4:30pm
Frequently Asked Questions
What is Birmingham's relationship to Jefferson County for permitting?
The City of Birmingham and Jefferson County are separate jurisdictions. If your property is within Birmingham city limits, you use the City of Birmingham Department of Planning, Engineering and Permits. If your property is in unincorporated Jefferson County (or in suburban cities like Hoover, Vestavia Hills, Mountain Brook, or Homewood), you work with Jefferson County or your specific municipality. Permitting systems, zoning rules, and fee schedules differ between these jurisdictions. Always confirm which jurisdiction applies to your specific address.
Can I build an ADU on my Birmingham property?
Yes. Birmingham allows accessory dwelling units on single-family lots under the Birmingham Zoning Ordinance. Maximum size is typically 800 sqft for detached ADUs. Alabama has no statewide ADU law — Birmingham's local ordinance governs. Building permit from Department of Planning, Engineering and Permits required. Birmingham Water Works and Alabama Power connection fees apply for independent utility service. No owner-occupancy requirement.
What are Birmingham's Civil Rights historic sites and do they affect property development?
Birmingham has nationally significant Civil Rights sites near downtown, including the 16th Street Baptist Church (National Historic Landmark, site of the 1963 bombing), Kelly Ingram Park, and the Birmingham Civil Rights Institute. These are in the Birmingham Civil Rights historic district — one of the most significant historic sites in American history. Development near designated landmarks and in historic districts requires coordination with the Landmark Preservation Board and may require Certificate of Appropriateness for exterior changes.
What are Birmingham's STR (Airbnb) requirements?
Birmingham requires a Short-Term Rental License for rentals under 30 days. Annual fee is approximately $200. License number must appear in all booking platform listings. Occupancy limits (2 per bedroom), noise ordinance, and safety requirements apply. Alabama's 4% state lodgings tax plus Jefferson County and Birmingham local lodgings taxes apply to STR income.
How does UAB affect Birmingham's housing market?
The University of Alabama at Birmingham (UAB) is Birmingham's largest employer, with over 23,000 employees in healthcare, research, and education. UAB's Medical Center and campus complex in the Southside neighborhood drives significant rental demand in Five Points South, Avondale, and adjacent neighborhoods. UAB's continued investment in the Birmingham Medical District has been a major stabilizing force for Birmingham's urban core, contributing to real estate appreciation in formerly disinvested neighborhoods.
Source: Birmingham Building Code — ADU (Accessory Dwelling Unit) Requirements. Last verified April 6, 2026. View source