Jefferson County, AL Building Setbacks & Zoning: Structure Height Limits (2026)
Key Facts
- Max height
- 3 stories
- Basements
- Excluded from height count, any finish level
- Min lot area
- 15,000 sq ft (12,500 with sewer)
- Front/rear setback
- 35 feet each
- Side setback
- 10 feet
- Adopted
- October 9, 2025
Summary
Homes built in Jefferson County's R-1 Single Family District, the county's standard suburban lot classification for unincorporated areas, are capped at three stories under Zoning Resolution Section 605. Finished, partially finished, and unfinished basements are all excluded from that height count, and the same three-story ceiling repeats across the county's other conventional and planned residential districts.
Area and Dimensional Regulations. In all the above permitted uses, with the exception of accessory buildings, the area and dimensional regulations set forth below shall be observed: ... e. Maximum Building Height: 3-stories. Finished, partially finished, or unfinished basements will not count toward the maximum building height.
Full Breakdown
Section 605's Area and Dimensional Regulations govern every use permitted in the R-1 Single Family District, which covers single-family detached housing on lots of at least 15,000 square feet (12,500 square feet where the lot connects to a live sanitary sewer line), with a minimum 75-foot lot width and 1,000-square-foot floor area. Alongside the three-story height cap, R-1 sets a 35-foot front yard, 35-foot rear yard and 10-foot side yard, with setbacks measured under Article 11, Sections 1101 through 1103. The height exclusion for basements, finished, partially finished or unfinished, means a walkout or daylight basement never counts as a fourth story even if it is fully livable, so long as the visible stories above grade stay at three or fewer.
This same three-story maximum recurs, word for word, across nearly every other conventional district in the Zoning Resolution, the E-MF Estate Mini-Farm, E-1 and E-2 Estate districts, the R-R Rural Residential district, R-2 Single Family district, and the Planned Unit Development tables for PE-3, PE-4 and PR-3, making three stories the practical ceiling for residential construction anywhere in unincorporated Jefferson County outside a specifically approved taller PUD or institutional classification. Before any building permit issues, the Building Commissioner must certify the proposed structure conforms to the Zoning Resolution's height and dimensional limits; the Department of Development Services will not certify zoning, and no permit will issue, for a structure that exceeds the applicable height table.
Violations & Fines
No building permit may issue for a structure that exceeds the three-story cap; the Building Commissioner must certify zoning conformance first under Section 1901.03, and the Department of Development Services withholds certification for any noncompliant design. Building or occupying an over-height structure anyway is a class B misdemeanor under Section 1901.04, with each day it stands treated as a separate offense, after a written cease-and-correct notice.
Frequently Asked Questions
Can I add a fourth story if I keep the basement unfinished?
Does the three-story limit change if I'm in a Planned Unit Development?
Who signs off before I can build to three stories?
Sources & Official References
Other rules in Jefferson County
Compare Jefferson County to another location·View the Alabama building setbacks & zoning overview
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