Franklin

ADU Pass helps homeowners in Franklin, Monroe County, Alabama navigate the permit paperwork for building an accessory dwelling unit. This area covers 1 ZIP code.

1 ZIP code

ADU details

ADU legality: unclear

Stateunclear (Alabama accessory-dwelling framework) — Alabama statewide ADU posture per state-adu-research file.
Countywith-restrictions (Monroe County unincorporated zoning) — Monroe County permits ADUs in unincorporated areas under state-law-aligned standards. Within Franklin city limits the city ordinance plus state law govern.
Citywith-restrictions (City of Franklin Municipal / Zoning Code — Accessory Dwelling Units) — City of Franklin permits ADUs under the local ordinance aligned with Alabama statewide framework where applicable.

Alabama leaves ADU regulation to local municipalities under home-rule or Dillon-rule authority. Franklin permits ADUs subject to local conditions per its zoning ordinance.

Cost scenarios

ScenarioSq ft PermitBuildTotal
minimum 150 $1,200 $30,000 $31,200
600 600 $1,200 $120,000 $121,200
midpoint 525 $1,200 $105,000 $106,200
maximum 900 $1,200 $180,000 $181,200
Fee breakdown
Plan review$360
Building permit$660
Impact fees$180
Total$1,200

Viability (permitted uses)

  • Long-term rental: yes Long-term rental of ADU generally permitted; landlord-tenant law and any city rental-registration ordinance apply.
  • Short-term rental: with-restrictions STR rules vary by city. Franklin regulates STRs separately from ADU permitting; check local STR ordinance and HOA covenants.
  • Office rental: with-restrictions Detached office rental requires home occupation permit or rezoning.
  • Home office: yes Home occupation permitted with restrictions on signage and customer traffic.
  • Studio / workshop: yes Personal artist studio is a permitted accessory use.
  • Agriculture: with-restrictions Limited urban agriculture permitted in residential zones; livestock varies by district.
  • Relative support: yes Family-occupancy ADU explicitly permitted in single-family zones.

Utilities

  • Water: Franklin Water Utility · 30d connect · $4,500
  • Sewer: Franklin Sewer / Wastewater · 30d connect · $5,500
  • Electric: Franklin Electric Utility · 21d connect · $1,800
  • Gas: Franklin Gas Utility · 30d connect · $1,500

Property values & taxes

Median value$350,000
Median tax$3,500/yr
Effective rate1%

Construction timeline

Detached build24 weeks
Conversion14 weeks
Contractor lead3 months

Realistic total: best 7mo · typical 10mo · worst 16mo

Financing

Insurance impact

Annual premium delta$720
Landlord policyrecommended
Umbrella threshold$1M umbrella when renting

HOA prevalence & preemption

State HOA preemptionno

Alabama has no HOA-ADU preemption; HOA covenants restricting ADUs are enforceable.

Technical envelope (climate & building code)

Climate & energy code

IECC climate zone3A
Heating degree days2,800
Cooling degree days2,000
Design low / high18°F / 94°F
Frost depth8"
Design snow load5 psf
Wind design speed115 mph
Seismic design cat.B
Annual rainfall54"
Wildfire exposurelow
Energy codeIECC
Version / adopted2015 / 2016

Building code

Base codeIRC
Version year2,015
Adopted2016
Fire sprinklernone
Egress window5.7 sqft min
Min ceiling7 ft
Attic R-valueR-38 min
Wall R-valueR-13 min

Amendments:

  • Amendment
  • Amendment
Alabama state — ADU law and programs

State financing programs

Alabama operates no ADU-specific statewide loan, grant, or forgivable-loan program. The Alabama Housing Finance Authority (AHFA) is the state's housing finance agency and administers first-time-homebuyer mortgages, down-payment assistance, mortgage credit certificates, and Low-Income Housing Tax Credit allocation, but none of its programs target ADU construction directly. The Alabama Department of Economic and Community Affairs (ADECA) administers the federal HOME Investment Partnerships Program; HOME funds can in principle support ADU construction by income-qualified households when paired with a participating local jurisdiction, but Alabama has no state-level ADU set-aside.

Federal (United States) — ADU-relevant rules and programs

Federal ADU law

The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.

Federal financing programs

Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.

Federal tax credits

There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.

Federal housing programs

HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.

ZIP Code

  • 36444

Post Office

  • 102 Main St, 36444