Accessory Structures in Huntsville, AL (2026)
9 verified accessory structures rules for Huntsville, Alabama, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Huntsville allows accessory dwelling units in certain residential zones under the citys zoning ordinance updates. ADUs must meet setback, size, and owner-occupancy standards.
Accessory Structures: Adu Rules
Some RestrictionsADU Permits
Huntsville regulates accessory dwelling units (ADUs) through the Huntsville Zoning Ordinance, with general accessory-structure standards in Article 72 and use definitions in Article 3. Alabama is a Dillon Rule state with no state-level ADU preemption — local zoning controls. ADUs require a building permit through the Huntsville Inspection Department and must comply with the 2021 International Residential Code adopted under Code of Ordinances Chapter 6.
Huntsville Accessory Dwelling Unit Permits (Zoning Ordinance Art. 72)
Some RestrictionsADU Impact Fees
Huntsville 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 Huntsville Inspection Department plus Huntsville Utilities tap fees if a new water, sewer, or electric service is required.
Huntsville ADU Impact Fees (No General Residential Impact Fee)
Few RestrictionsADU Owner Occupancy
The Huntsville Zoning Ordinance does not impose an explicit citywide owner-occupancy mandate on every ADU, but accessory living quarters in single-family Residence districts (R-1A, R-1B, R-1C) 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 Residence 3 zoning. Alabama has not preempted local ADU rules.
Huntsville ADU Owner-Occupancy Practice
Some RestrictionsADU Rental Restrictions
Long-term rental of a Huntsville ADU generally requires Residence 3 zoning or a use variance because R-1 single-family districts treat the accessory dwelling as incidental to the main dwelling. Short-term rentals under 30 days are regulated by Code of Ordinances Chapter 22 (Hotels and Motels) and Chapter 11 (Business Licenses), requiring a business license and collection of city lodgings tax. Alabama has not preempted local STR rules.
Huntsville ADU Rental Restrictions and STR Rules
Some RestrictionsShed Rules
Huntsville exempts small sheds under 200 sq ft from building permits but still requires zoning compliance with setbacks. Larger sheds need a building permit.
Accessory Structures: Shed Rules
Few RestrictionsGarage Conversions
Converting a Huntsville garage to living space requires building permits, zoning review, and compliance with egress, insulation, and parking replacement requirements.
Accessory Structures: Garage Conversions
Some RestrictionsCarport Rules
Carports in Huntsville require a building permit and must meet residential setbacks. Metal carports must be anchored and meet wind load standards. Front-yard carports are restricted in most zones.
Accessory Structures: Carport Rules
Some RestrictionsTiny Homes
Tiny homes on foundations must meet Huntsville building code and minimum dwelling standards. Tiny homes on wheels are treated as RVs and may not be used as permanent residences in most zones.
Accessory Structures: Tiny Homes
Some RestrictionsLooking for Madison County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Huntsville city rules.
Accessory Structures in Madison County →