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Lee County, AL Accessory Structures: ADU Rules (2026)

Few Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

ADU rules in Lee County, AL, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

ADU definition: Single-family dwelling attached/detached, same lot as house
RP, CR, RC districts: Permitted by right (P)
Special District (SP*): Not permitted (N)
Manufactured home ADU: Also Permitted P/P/P/N
Minimum lot area: 15,000 sq ft (Sec. 4.2(1))
Max residential height: 45 feet (Sec. 4.2(3))

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in Alabama under recent ADU streamlining laws. The Lee County, AL rules below cover local size, height, and setback requirements.

Summary

Lee County's Zoning Regulations list an "Accessory dwelling unit," attached or detached from the primary house on the same lot, as its own Rural Residential use under Section 8.4(2). Section 3.7's Table of Permitted Uses marks it "P," Permitted by right, in the Rural Preserve, Corridor and Rural Center districts, and "N" in the Special District.

These county ordinances apply to unincorporated areas of Lee County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

Accessory dwelling unit. A dwelling for a single family, attached or detached to the primary single family residence located on the same lot. ... Manufactured (mobile) home accessory dwelling. A manufactured home used as an accessory dwelling unit, as defined in this section.

View official code

Full Breakdown

4(2) defines "Accessory dwelling unit" as "a dwelling for a single family, attached or detached to the primary single family residence located on the same lot," and separately defines a "Manufactured (mobile) home accessory dwelling" as a manufactured home used as an accessory dwelling unit under that same definition. 7 Table of Permitted Uses marks both classifications "P," Permitted, in the Rural Preserve, Corridor and Rural Center districts and "N," Not Permitted, in the Special District. 2: the lot must meet the 15,000-square-foot minimum, or a larger area the Lee County Health Department requires, meet the county's Subdivision and Land Development Regulations, and keep any residential structure, including the ADU, under the 45-foot height cap.

3's rule on combined uses: allowed only where the combined uses are commonly associated with and integrally related to one another, and each use independently meets its own zoning requirements. 2(b); any permit issued in conflict with the Zoning Regulations is void.

Violations & Fines

An ADU built, altered, or occupied without meeting the Section 4.2 standards, or outside a Permitted district, is enforced the same as any other zoning violation: the Planning Director serves written notice by certified mail with up to 30 days to correct it, and an uncorrected violation is referred to the County Attorney, with court costs and attorney fees charged to the losing violator (Secs. 6.2, 6.3).

Frequently Asked Questions

Can I build a garage apartment or in-law suite in unincorporated Lee County?

Yes, if the parcel is in a beat that adopted zoning and is classified Rural Preserve, Corridor or Rural Center. Section 3.7's Table of Permitted Uses marks "Accessory dwelling unit" "P," Permitted by right, in all three; only the Special District bars it.

Does the ADU need its own lot?

No. Section 8.4(2) defines an accessory dwelling unit as attached or detached from the primary single-family residence but located on the same lot, so it cannot be subdivided onto a separate parcel and still qualify.

What size or height limits apply to an ADU?

The Zoning Regulations set no separate ADU floor-area cap. The governing limits are the Article IV standards that apply to every structure: a 45-foot maximum height for residential buildings and the 15,000-square-foot minimum lot area under Section 4.2.

Do I need a permit to build an ADU?

Yes. Section 6.2(b) requires a building permit and certificate of occupancy for any structure, and any permit issued in conflict with the Zoning Regulations "shall hereby be declared null and void."

Sources & Official References

[1]Lee County Zoning Regulations (Lee County Planning Commission)

Other rules in Lee County

Animal Ordinances: Chickens & LivestockFew Restrictions Shed & Carport RulesSome Restrictions Parking Rules: Abandoned VehiclesSome Restrictions Animal Ordinances: BeekeepingFew Restrictions Business Licensing & Operations: Auto Repair on Residential PropertySignificant Restrictions Building Setbacks & Zoning: Lot Coverage LimitsLight Restrictions Environmental Rules: Erosion ControlSome Restrictions

All Lee County rules

How Lee County compares: Easiest Cities to Build an ADU·Compare Lee County to another location·View the Alabama accessory structures overview

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