Tiny home rules in Jefferson County, AL — covering tiny houses on wheels (THOWs), park model RVs, and tiny home on foundation builds — determine where they are legal and how they get permitted.
Jefferson County treats foundation-built tiny homes as standard dwellings under the 2018 IRC. Birmingham zoning requires minimum 400 sq ft (IRC Appendix Q allows under 400). Tiny homes on wheels classified as RVs, prohibited as permanent residences.
Jefferson County and Birmingham have adopted the 2018 IRC including Appendix Q which provides standards for tiny houses under 400 sq ft on foundations. Foundation-built tiny homes must meet all dwelling requirements: permanent foundation, utility connections to water/sewer/electric, minimum ceiling heights (6'8' main rooms, 6'4' bathrooms), egress windows in sleeping rooms, and smoke/CO detectors. Birmingham zoning requires a minimum 400 sq ft per dwelling in single-family districts, though Appendix Q application may allow smaller. Tiny homes on wheels (THOW) are classified as RVs under Alabama Code and cannot serve as permanent residences in Jefferson County residential zones. RV parks may accommodate THOW but limit stays to 180 days typically. ADU regulations are limited in Birmingham, though recent code updates are expanding options.
Unpermitted dwellings: removal order or retroactive permit with penalty fees. THOW occupied as permanent residence: zoning violation, $100-$500 daily fines. No certificate of occupancy: cannot legally inhabit.
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See how Jefferson County's tiny homes rules stack up against other locations.
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