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Zoning Guide

ADU Rules in Tuscaloosa, Alabama

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ADU Rules in Tuscaloosa, Alabama

Tuscaloosa is home to the University of Alabama and has significant demand for accessory housing. The city permits ADUs in residential zones under its Zoning Ordinance. Alabama has no statewide ADU law, so Tuscaloosa's local code applies.

Permitted ADU Types

  • Detached ADU: A standalone structure on the residential lot
  • Attached ADU: An addition to the main house with separate entrance
  • Garage Apartment: A dwelling unit above or integrated into a garage structure

Size Limits

ADU Type Maximum Size
Detached ADU 800–1,000 sq ft (varies by zone)
Attached ADU 40–50% of primary dwelling floor area
Garage Apartment Existing garage footprint

Setbacks

  • Front: Must meet base zone standard
  • Side: 5 feet minimum
  • Rear: 10 feet minimum
  • Separation from primary dwelling: 10 feet minimum

Height

  • Detached ADU: Maximum 18 feet
  • Cannot exceed the height of the primary structure

Owner Occupancy

Tuscaloosa requires owner occupancy of either the principal dwelling or the ADU. This is especially important in neighborhoods near the University of Alabama where rental pressure is high.

Rental Registration

If you rent your ADU, you may be required to register as a rental property with the city. Check current rental registration requirements with the Planning & Development Services Department.

Parking

One additional parking space is required for the ADU. In dense areas near campus, this may be subject to additional review.

Permit Process

  1. Zoning check: Confirm ADU eligibility by zone
  2. Plans: Submit complete architectural and site plans
  3. Zoning review: Planning staff reviews for compliance
  4. Building permit: Issued by Development Services
  5. Inspections: All phases must pass
  6. Certificate of Occupancy: Required before occupancy

Contact

Tuscaloosa Planning & Development Services 2201 University Blvd, Tuscaloosa, AL 35401 Phone: (205) 248-5100 Website: tuscaloosa.com/planning-development-services

Disclaimer: Verify current regulations with Tuscaloosa Planning & Development Services before starting any project.

More about Tuscaloosa Zoning

Sources

  1. Tuscaloosa Zoning Ordinance — Accessory Structures and Dwellings·library.municode.com·Accessed 2026-04-07·Direct link
  2. City of Tuscaloosa Planning & Development Services·tuscaloosa.com·Accessed 2026-04-07·Direct link

FAQ

Are ADUs allowed in Tuscaloosa?
Yes. Tuscaloosa permits accessory dwelling units in single-family residential zones. The University of Alabama's presence has created significant demand for accessory housing, though the city maintains owner-occupancy and rental regulations.
What is the maximum ADU size in Tuscaloosa?
Accessory dwelling units in Tuscaloosa are generally limited to 800–1,000 square feet depending on the zoning district and lot size.
Can I rent my ADU to students in Tuscaloosa?
Renting an ADU to students or other tenants is allowed provided the property owner occupies the primary dwelling and complies with applicable rental registration requirements.