Building permits in Madison County, Alabama
Find the right authority before you build. Madison County permitting follows Alabama law — here is exactly who issues the permit and where to start.
County + cities (mixed)
Madison County — Inspection Department
The Madison County Inspection Department issues building permits for unincorporated Madison County. Inside the cities of Huntsville, Madison, New Hope, Gurley, Owens Cross Roads, and Triana, the municipal building departments issue permits under their own systems.
Open the official permit portal →
The county enforces the 2018 IBC/IRC family with Alabama amendments. One-story detached accessory structures not over 200 sq ft, fences not over 7 ft, and retaining walls not over 4 ft are common exemptions.
Permit cheat-sheet (Alabama rules)
| Project | Permit? | Authority | Typical fee | Timeline | Go / No-Go | Key notes |
|---|---|---|---|---|---|---|
| 🏠 Accessory Dwelling Unit (ADU) | Permit required | city | Valuation-based; set by the issuing city or county. | — | Case by case | Alabama has no statewide ADU (accessory dwelling unit) law. ADUs are allowed only where the local zoning ordinance permits them — for example, Birmingham has rezoned to allow ADUs in certain residential zones. When an ADU is permitted by zoning, a full building permit is required. |
| 🪵 Deck / Porch | Conditional | city | Valuation-based; set by the issuing city. | Birmingham residential plan review typically 5–10 business days. | Generally allowed | Birmingham adopts the IBC/IRC with Alabama amendments. Deck footings commonly bottom out at the ~12 in frost depth, but expansive Black Belt clay in central Birmingham often requires deeper footings and a geotechnical report. Exempt: Decks ≤30 in above adjacent grade are typically exempt (IRC R105.2). |
| 🧱 Fence / Wall | Conditional | city | Often a flat zoning/permit fee set by the city; Birmingham requires a permit for fences over 6 ft. | — | Generally allowed | Pool-enclosure fences must meet the adopted code barrier requirements regardless of permit threshold. Exempt: Fences over ~6–7 ft typically require a permit; Birmingham triggers a permit above 6 ft. |
| 🛖 Shed / Outbuilding | Conditional | city | Valuation-based; set by the issuing city. | — | Generally allowed | Even exempt sheds must meet zoning setback and lot-coverage rules. Exempt: Detached accessory structures ≤120 sq ft are generally exempt per IRC R105.2; Birmingham requires a permit for sheds larger than 144 sq ft (≈12×12). |
| 🪜 Basement Finish | Permit required | city | Valuation-based; includes trade permits. | Birmingham residential plan review typically 5–10 business days. | Generally allowed | Finishing a basement to living space requires permits for framing, electrical, plumbing, and mechanical work; bedrooms need code-compliant egress windows. Expansive clay soils in central Alabama drive drainage/waterproofing requirements. |
| 🚗 Garage / Carport | Permit required | city | Valuation-based; includes trade permits. | Birmingham residential plan review typically 5–10 business days. | Generally allowed | New attached or detached garages require a full building permit and plan review (fire-separation details for attached garages). |
| ☀️ Rooftop Solar PV | Permit required | city | Building + electrical permits; fee set by the city. | — | Generally allowed | Alabama requires licensed electrical contractors for PV wiring; structural review for roof load. |
| 🌡️ HVAC Replacement | Conditional | city | Mechanical permit; fee set by the city. | — | Generally allowed | Alabama requires licensed mechanical/HVAC contractors; equipment must meet current energy-efficiency rules. |
| 🍳 Kitchen Remodel | Conditional | city | Valuation-based when structural, plumbing, or electrical work is included. | — | Generally allowed | Verify with the local building department before altering layouts. |
| 🛁 Bathroom Remodel | Conditional | city | Valuation-based when plumbing is relocated. | — | Generally allowed | Ventilation to the exterior is required. |
| 🏗️ Room Addition | Permit required | city | Valuation-based; includes trade permits. | Birmingham residential plan review typically 5–10 business days. | Generally allowed | Any new conditioned footprint requires a building permit, setback/zoning review, and trade permits. |
| 🪟 Window / Door Replacement | Conditional | city | Usually no fee for in-kind swaps; a permit is needed if the opening is enlarged. | — | Generally allowed | Replacement products should meet the energy code when the code is triggered. Exempt: Same-size, in-kind window/door replacement is generally exempt. |
| 🏘️ Roof Replacement | Conditional | city | Often over-the-counter or exempt for same-footprint re-roof. | — | Generally allowed | Verify with the local building department. Exempt: Same-material, same-slope re-roof is often exempt or over-the-counter; structural deck changes require a permit. |
| 🅿️ Driveway / Parking Pad | Conditional | city | Building permit often not required; curb-cut/right-of-way work is separate. | — | Generally allowed | A separate right-of-way permit is usually needed to cut the curb or connect to the street. Exempt: Replacing a driveway in the same footprint (no new curb cut) is generally exempt. |
| 🏊 Swimming Pool / Spa | Permit required | city | Valuation-based; includes barrier/fencing and electrical bonding review. | — | Generally allowed | All pools require a code-compliant barrier; local codes apply IRC/ISPSC barrier provisions. |
| 🧱 Retaining Wall | Conditional | city | Valuation-based when over the height threshold. | — | Generally allowed | Expansive-clay sites may require drainage design even for lower walls. Exempt: Retaining walls ≤4 ft above grade and not supporting a surcharge are generally exempt. |
| 💥 Demolition / Teardown | Permit required | city | Valuation-based; set by the issuing city or county. | — | Generally allowed | A demolition permit is required before tearing down a house or attached structure. Local building departments require utility disconnects (electric, gas, water, sewer) and an asbestos/lead-paint clearance for pre-1978 homes before demolition. |
| 🚰 Septic System | Permit required | county | Permit fee set by the county health department; engineered systems cost more. | — | Generally allowed | New or replacement onsite wastewater (septic) systems require a permit from the local county health department (Alabama Dept. of Public Health). A soil/perc evaluation and engineered design are typically required; licensed installers must perform the work and the system is inspected before backfill. |
| 🔌 EV Charger | Conditional | city | Electrical permit; fee set by the city. | — | Generally allowed | Home EV charging (240V branch circuit + wall-mounted EVSE) requires an electrical permit and must meet the NEC (Article 625). Many municipalities fast-track residential EVSE. A load calculation and possible service upgrade are reviewed. |
| ⚡ Standby Generator | Conditional | city | Mechanical/electrical permit; fee set by the city. | — | Generally allowed | A permanently installed standby generator requires mechanical and electrical permits (transfer switch, fuel gas/propane line). Setback, carbon-monoxide ventilation, and noise rules apply; some HOAs restrict generator placement. |
Frequently asked questions
Who issues building permits in Madison County, Alabama?
Madison County — Inspection Department is the permitting authority for Madison County. Permitting is split — cities issue for incorporated areas, the county for unincorporated areas. Start at the official portal linked above.
Do I go to the county or my city for a building permit in Madison County?
Permitting is split — cities issue for incorporated areas, the county for unincorporated areas.
What home projects need a permit in Madison County?
The same project types shown in the cheat-sheet above (ADU, deck, fence, shed, solar, and more) — rules follow Alabama state law. Whether the county or your city issues it depends on your property's incorporation status.
How do I apply for a permit in Madison County?
Use the official permit portal linked above. Most offices accept online submissions; have your plans, site information, and contractor details ready before applying.