Shed Permits & Setbacks in Alabama

Permit details last verified current by the Cook team in August 2026. County and municipal rules change — always confirm requirements with your local building department before you build.

[DRAFT — pending counsel review]

This page is general orientation, not legal advice. Permit rules in Alabama are set and enforced city-by-city and county-by-county, and they change. Always confirm the specifics with your local building department before you build or buy.

Do you need a permit for a shed in Alabama?

Alabama has no single statewide shed-permit rule. The state adopts building codes, but permitting and enforcement happen locally — the office that controls your shed is your city or county building department. As of this writing, most Alabama jurisdictions follow the model-code baseline in IRC/IBC Section 105.2: a one-story detached accessory building of 120 sq ft or less generally does not need a building permit. Above that, rules vary by jurisdiction:

Baldwin County — generally no permit for a one-story detached accessory structure up to 400 sq ft when a primary residence already exists on the lot and it is not in a flood zone (commercial and multifamily stay at 120 sq ft).
Mobile County — exemption raised to 200 sq ft, but only if the shed has no conditioned space, is not served by electric/water/gas, is not in a flood zone, and is not in the coastal Wind Exposure Category D.
City of Madison — 200 sq ft or smaller is generally exempt; larger needs a permit.
Huntsville — publishes no size exemption; the city expects a permit for accessory structures and directs homeowners to its Inspection Department.

Even where a shed is permit-exempt, that only waives the building permit — zoning, setbacks, and flood rules still apply (see below). Confirm your exact threshold with your city or county before you order.

Setbacks & property lines

A permit exemption is not a placement exemption. As of this writing, Alabama setback distances are set by each municipality and zoning district, so they vary — but a common residential pattern (spelled out, for example, in Huntsville's residential rules) looks like this:

Detached sheds go in the rear yard.
Keep at least 5 ft from side and rear property lines.
Keep at least 10 ft from your house and any other structure.
Stay off recorded easements (utility, drainage).
Corner lots must also meet the secondary-front-yard setback.
Accessory buildings are typically capped at two stories.

Treat 5 ft / 10 ft as a representative norm, not a guarantee — your district may require more. Pull your exact setbacks and any easements from your city or county zoning office before you pick a spot. Cook buildings arrive fully built and are set in place, so it helps to know your clear-of-line footprint before delivery day — confirm the numbers locally first.

When a permit IS required

Some conditions pull a shed back under permitting no matter how small it is. As of this writing, the common triggers across Alabama jurisdictions are:

Utilities. Running electrical, plumbing, or gas to the shed generally requires its own trade permit regardless of size — standard practice statewide. Mobile County explicitly voids its size exemption the moment a shed is served by electric, water, or gas, and Huntsville limits plumbing in an accessory structure to one commode and one lavatory.
Flood zones. In a Special Flood Hazard Area, a permit is generally required regardless of size — verified for Baldwin and Mobile Counties.
Coastal high wind. In Mobile County's Wind Exposure Category D, the size exemption does not apply.
Conditioned/finished space. Heating or cooling the shed — turning it into an office or studio — generally moves it out of plain "accessory storage" territory.

Any of these, and you are back to filing. Confirm with your local building department, since the exact triggers vary by jurisdiction.

Before you buy: a 3-step check

Call your city or county building department. Ask two things: the size threshold that triggers a building permit at your address, and whether your lot is in a flood zone or a special wind-exposure area.
Pull your zoning setbacks and easements. Confirm rear-yard placement and your side/rear distances so the building sits legal from day one.
Check your HOA or deed restrictions. These operate independently of the building code — an HOA can restrict size, siding, color, or placement even where the county would not. Get any approval in writing before you order.

Cook Portable Warehouses buildings are wood storage buildings delivered fully assembled, so it pays to settle the permit and setback questions before delivery rather than after. Once you know your local rules, your nearest Alabama Cook dealer can walk you through building sizes and delivery logistics for your site — and can point you back to the right local office if anything above is unclear. None of this replaces confirming the specifics with your own city or county.

Frequently asked questions

What's the biggest shed I can build in Alabama without a permit?

It depends entirely on your jurisdiction. As of this writing, many Alabama cities follow the 120 sq ft model-code baseline, but Baldwin County allows up to 400 sq ft residential, and Mobile County and the City of Madison allow up to 200 sq ft (each with conditions), while Huntsville publishes no size exemption at all. Confirm the threshold for your address with your local building department before you buy.

Do I need a permit to run power to my shed?

Generally yes. As of this writing, adding electrical, plumbing, or gas to an accessory building in Alabama typically requires its own trade permit regardless of the shed's size — several counties void their size exemption once a shed is served by utilities. Confirm the requirement with your local building department.

My shed is permit-exempt — can I put it anywhere?

No. A building-permit exemption does not waive zoning. As of this writing, Alabama setbacks, easement rules, and flood-zone requirements still apply to exempt sheds, so you generally still have to meet your district's property-line distances and stay off recorded easements. Confirm your setbacks with your city or county zoning office before placing the building.