ADU Rules in Madison, Alabama

Madison is a rapidly growing suburb north of Huntsville. As a planned community, many neighborhoods have HOA restrictions that may limit ADU construction beyond city zoning standards. The city's Zoning Ordinance governs baseline ADU regulations for non-HOA properties.

Permitted ADU Types

• Detached ADU: Standalone structure, where permitted by zone and HOA rules
• Attached ADU: Addition to primary dwelling with separate entrance
• Garage Conversion: Converting a garage to living space (subject to HOA approval)

Size Limits

Setbacks

• Front: Must meet base zone requirements (typically 25–30 ft)
• Side: 5 feet minimum
• Rear: 10 feet minimum
• Separation from primary: 10 feet minimum

Height

• Detached ADU: Maximum 15 feet
• Cannot exceed height of primary dwelling

HOA Restrictions

Before proceeding with an ADU, verify:

1. Whether your property is in an HOA
2. Review your CC&Rs (Covenants, Conditions, and Restrictions)
3. Obtain HOA approval if required — HOA rules take precedence over city zoning in many cases

Owner Occupancy

The property owner must reside in the primary dwelling or the ADU.

Parking

One additional off-street parking space is required per ADU.

Permit Process

1. HOA check: Obtain HOA approval if applicable
2. Zoning check: Confirm eligibility with Madison Planning
3. Submit plans: Architectural drawings and site plan
4. Planning review: Zoning compliance review
5. Building permit: Issued by Building Department
6. Inspections: All required inspections must pass
7. Certificate of Occupancy: Required before occupancy

Contact

Madison Planning & Zoning 100 Hughes Rd, Madison, AL 35758 Phone: (256) 772-5640 Website: madisonal.gov/departments/planning

Disclaimer: Verify current requirements with the City of Madison Planning Department and your HOA before starting any project.