ADU Pass
Alachua
ADU Pass helps homeowners in Alachua, Alachua County, Florida navigate the permit paperwork for building an accessory dwelling unit. This area covers 2 ZIP codes.
Map
ADU details
ADU legality: allowed-with-restrictions
Florida's ADU statute is enabling, not preemptive. Florida Building Code 8th Edition (2023) wind-design (per ASCE 7-22) governs structural review.
Cost scenarios
| Scenario | Sq ft | Permit | Build | Total |
|---|---|---|---|---|
| minimum | 200 | $2,200 | $50,000 | $52,200 |
| 600 | 600 | $2,200 | $150,000 | $152,200 |
| midpoint | 600 | $2,200 | $150,000 | $152,200 |
| maximum | 1,000 | $2,200 | $250,000 | $252,200 |
Fee breakdown (as of 2026-04)
Permitting process
Viability (permitted uses)
- Long-term rental: yes Long-term rental of an ADU is generally permitted; Florida landlord-tenant law (Chapter 83 FS) governs.
- Short-term rental: with-restrictions Florida § 509.032 partially preempts STR regulation; vacation rentals must register with FDBPR. Local rules on noise, parking, and density may still apply. HOA covenants frequently restrict STR independently.
- Office rental: with-restrictions Detached office rental to non-resident requires home occupation permit or rezoning.
- Home office: yes Home occupation by owner is permitted with restrictions on signage, customer traffic, and outside employees.
- Studio / workshop: yes Personal artist studio / workshop is a permitted accessory use in residential zones.
- Agriculture: with-restrictions Limited urban agriculture is permitted in residential zones; livestock is district-dependent.
- Relative support: yes Family-occupancy ADU explicitly permitted; § 193.703 FS granny-flat assessment reduction available for qualifying senior-relative additions.
Incentives
Contacts
Utilities
- Water: City of Alachua Public Services (water) · 30d connect · $4,500
- Sewer: City of Alachua Public Services (sewer); FDOH septic for outlying parcels · 30d connect · $5,500
- Electric: City of Alachua Electric Utility; Clay Electric Cooperative in some areas · 21d connect · $1,800
- Gas: TECO Peoples Gas (where available); LP otherwise · 30d connect · $1,500
Property values & taxes
Construction timeline
Realistic total: best 7mo · typical 11mo · worst 16mo
Modular pathway inspectors are experienced with modular
Financing
State ADU loans:
Insurance impact
HOA prevalence & preemption
Florida Chapter 720 FS does not preempt HOA ADU bans; covenants restricting ADUs are enforceable.
Regulatory overlays (1)
- flood-zone
FEMA AE flood zones cover low-lying riverine and lakeside areas; elevation certificates and flood-resistant construction required for SFHA parcels.
Technical envelope (climate & building code)
Climate & energy code
Building code
Amendments:
- Amendment
- Amendment
Legal history (timeline)
Current ordinance: City of Alachua Land Development Regulations — Accessory Residential Use, adopted 2018-01-01, last amended 2024-01-01
- 2007-07-01 — Florida Statutes § 163.31771 enacted (state-statute)
Enabling statute authorizing local governments to adopt ADU ordinances on parcels zoned for single-family residential use.
Effect: Set the permissive Florida ADU framework still in force in 2026. - 2023-03-29 — Live Local Act (SB 102) signed (state-statute)
Affordability framework with by-right multifamily preemption on commercial / industrial / mixed-use parcels for projects with at least 40% affordable units.
Effect: Indirect ADU effect: shifts secondary-unit pressure toward larger preempted multifamily on non-residential parcels; does not directly compel ADU approvals in single-family zones.
Alachua County — county ADU rules and overlays
County ADU ordinance
Alachua County (county seat Gainesville, home of the University of Florida) regulates accessory dwelling units on unincorporated parcels through the Alachua County Unified Land Development Code (ULDC). Alachua has been notably more progressive on ADU policy than most Florida counties, partly driven by Gainesville's sustained student-and-university-adjacent rental demand. The ULDC permits ADUs in most residential zones subject to lot-size, setback, and occupancy conditions; Gainesville city code similarly permits ADUs in most residential districts and has an active ADU-incentive program for certain neighborhoods. County population approximately 290,000 including Gainesville. Florida has no statewide ADU preemption; § 163.31771 FS is permissive only. Pending SB 48 / HB 313 (2026 session) would establish a statewide ADU floor with a December 1, 2026 conformance deadline if enacted.
- Alachua County Unified Land Development Code (ULDC)
- Florida Statutes § 163.31771 — Accessory Dwelling Units
- Alachua County Comprehensive Plan — Housing Element
State-floor overlay: Florida has no statewide ADU preemption as of April 2026. § 163.31771 FS is permissive only. Pending 2026 bills (SB 48 / HB 313) would impose a statewide floor; Alachua's ordinance is already more permissive than the likely statutory floor, so conformance work would be modest (December 1, 2026 deadline in current drafts).
County regulatory overlays
Alachua County administers an environmentally-focused overlay portfolio. Paynes Prairie Preserve State Park and adjacent conservation lands, the Santa Fe River (northern county boundary), Newnans Lake, and karst-aquifer springshed protection overlays constrain ADU siting in affected areas. Suwannee River Water Management District and St. Johns River Water Management District jurisdictions both apply depending on watershed — an unusual dual-district situation.
- Paynes Prairie Preserve State Park buffer and surrounding Alachua Sink overlay — Paynes Prairie occupies approximately 22,000 acres south of Gainesville. Parcels adjacent to the preserve face additional habitat-compatibility review and, for parcels within the Alachua Sink drainage, enhanced water-quality protection requirements.
- Santa Fe River and Newnans Lake floodplain overlays — Alachua participates in NFIP. Parcels along the Santa Fe River (northern county boundary), Newnans Lake, Lake Santa Fe, and tributary corridors face Zone A or AE designations. ADU construction in a mapped floodplain requires elevation-certificate review.
- Karst / Springshed Protection Overlays — Alachua sits on the Floridan Aquifer with extensive karst features (springs, sinkholes, sinking streams). The county's springshed-protection overlays impose enhanced septic-system design requirements and limits on stormwater-runoff in springshed-contributing areas. ADU site work on karst parcels may require geotechnical investigation (to identify sinkhole risk) in addition to standard stormwater and septic review.
- Suwannee River Water Management District and St. Johns River Water Management District — Alachua's unusual position on the watershed divide places western and northern county within SRWMD jurisdiction and eastern / southern county within SJRWMD jurisdiction. ADU site work affecting wetlands or altering stormwater may require ERP from the appropriate district; applicants should verify which district applies to a given parcel.
- Hurricane Wind Zone — approximately 130-140 mph ultimate design wind speed — Alachua's inland-central location sits in approximately the 130-140 mph ASCE 7-22 ultimate design wind-speed zone (Risk Category II residential). Less severe than coastal counties but still requiring hurricane-rated construction details.
- University of Florida adjacency — Gainesville Comprehensive Plan Rental Permit Program — Gainesville (city) operates a Rental Permit Program that affects rental ADUs within city limits. Unincorporated Alachua parcels immediately adjacent to campus (Haile, Tioga, suburbanized areas) do not fall under the city's rental-permit program but may face informal market comparison pressure.
County permitting (unincorporated parcels)
Permits for ADUs on parcels in unincorporated Alachua County are issued by the Alachua County Growth Management Department. Alachua has nine incorporated municipalities (Gainesville, Alachua, Archer, Hawthorne, High Springs, La Crosse, Micanopy, Newberry, Waldo); Gainesville is by far the largest. Unincorporated Alachua includes substantial suburban growth corridors west and south of Gainesville (Haile, Tioga, Jonesville, Kanapaha), rural-residential and agricultural areas in eastern and northern county, and Paynes Prairie-adjacent areas in the south.
Florida state — ADU law and programs
State ADU law
Florida does NOT currently have a statewide ADU preemption law in effect. Florida Statutes § 163.31771 (enacted 2004, last amended 2020) is permissive — it authorizes local governments to adopt ADU ordinances but does not require them to. ADU rules are therefore set municipality-by-municipality: Miami-Dade, Orlando, St. Petersburg, Tampa, and a growing set of Florida cities have their own ordinances; many smaller counties and cities still prohibit or restrict ADUs by default. A preemption bill (SB 48 / HB 313) is pending in the 2026 legislative session and is likely to pass given that its 2025 predecessor cleared the Senate 37-0 and House 97-10 before dying on a procedural amendment dispute.
- Florida Statutes § 163.31771 — Accessory dwelling units — Permissive (not mandatory) statute. Defines an ADU as 'an ancillary or secondary living unit, that has a separate kitchen, bathroom, and sleeping area, existing either within the same structure, or on the same lot, as the primary dwelling unit.' Authorizes — but does not require — local governments to adopt ordinances allowing ADUs in single-family residential zones. Contains no size caps, no owner-occupancy rules, no HOA preemption. All substantive rulemaking is local.
State financing programs
Florida Housing Finance Corporation (FHFC) does not operate an ADU-specific state loan or grant program. FHFC's primary affordable-housing lever at the ADU tier is the State Housing Initiatives Partnership (SHIP), which distributes state documentary-stamp-tax revenue to all 67 counties and 52 entitlement cities for locally-administered housing programs — some of which may fund ADU construction at the local level (notably Orange County's Affordable ADU Loan Program, run through the Orange County Housing Finance Trust). FHFC's FL Assist down-payment programs and HFA Preferred / HFA Advantage conventional loans apply to ADU-eligible primary residences but do not single out ADUs. Proposed CS/SB 1440 would create a state property-tax exemption of up to 100% of assessed value for an ADU rented at affordable rates.
State housing programs
Florida does not currently operate a statewide pre-approved ADU plan catalog (unlike California or Washington). State-level ADU implementation is driven by (a) the permissive § 163.31771 which lets willing jurisdictions adopt ordinances, (b) SHIP pass-through funding to local ADU programs (Orange County's Affordable ADU Loan Program is the model), and (c) the affordable-housing property-tax exemption under the Live Local Act (SB 102 / SB 328). The Department of Economic Opportunity (DEO) — now reorganized as the Department of Commerce — provides technical assistance to local governments but no statewide ADU-specific mandate or program. Major counties (Miami-Dade, Orange, Pasco, Hillsborough, Pinellas, Broward) have published their own ADU ordinances and guidance documents.
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 Codes
- 32615
- 32616
Post Office
- 15200 NW 142nd Ter, 32615