Building permits, zoning and land rules in Alachua County, Florida

At a glance

Building permit

Generally required for construction and building-system work; minor repairs are excepted; valid 180 days¹

Zoning

County ULDC governs unincorporated land; municipalities administer their own zoning³⁹

Septic permit

Florida Department of Health in Alachua County permits and inspects; the state DEP enforces the governing laws¹⁰⁸¹¹

Owner-builder

You can build a home you own and occupy without a license, but can't sell or lease it for 1 year after completion¹²¹³¹⁴

Minimum lot size (Rural Clusters)

1 acre minimum for a lot on private well and septic¹⁵

Building height

35 feet maximum in single-family residential districts¹⁶

Accessory dwelling unit

Allowed in most rural/estate districts, no minimum size, up to 1,700 sq ft, $70 zoning permit fee¹⁷

Floodplain permit

Required for any development in the floodplain under ULDC Chapter 406¹⁸

Who to call

Contact details are copied from each office’s official page and were checked against it on October 16, 2026.

Do you need a building permit in Alachua County, Florida?

Yes. Alachua County generally requires a permit to construct, enlarge, alter, move or demolish a building, change its occupancy, or install or alter an electrical, gas, mechanical or plumbing system¹. Redecorating and minor repairs such as cabinet or floor-covering replacement, painting, limited drywall repair, fixture replacement without plumbing changes, and appliance or light replacement without wiring changes generally do not require one¹. Alachua County adopted the Florida Building Code with local administrative amendments and wind-speed lines, and the county currently lists the 2023 Florida Building Code, 8th Edition¹⁹. Permitted work must remain accessible and exposed until each required inspection is approved²⁰. A new or altered building cannot be occupied until the building official issues a certificate of occupancy after the required systems pass inspection²¹. An Alachua County building permit is valid for 180 days, and construction must begin during that period¹. In unincorporated Alachua County, a nonresidential farm building may qualify for the Florida Building Code permit exemption only on bona fide agricultural land when it is used primarily for agriculture and never as a dwelling; the county still requires a site sketch, zoning and setback review, and a flood-zone permit when applicable²².

Who is the Alachua County building department?

The Alachua County Building Division, at the County Annex Building, 10 SW 2nd Avenue in Gainesville, issues building permits and schedules inspections for unincorporated Alachua County². Call 352-374-5243, Monday through Thursday 8:00 a.m. to 4:00 p.m. or Friday 8:00 a.m. to 1:00 p.m., or email building@alachuacounty.us². The same Growth Management department's Planning & Development side, reachable at 352-374-5249, handles comprehensive plan questions, rezonings and zoning-district interpretation²³. Every building permit starts with a minimum base fee of $150 for single-family new construction, additions and alterations, plus a fee based on construction value, and starting work before approval adds a penalty of 100 percent of the usual fee²⁴. An owner may perform work on a home the owner owns and occupies, but required permits still apply and the property cannot be offered for sale or lease for 1 year after final completion¹³. Bring a site plan if you are building a driveway, construction drawings for an addition, or a full construction document set for a new home; what you need depends on the project, so call ahead²⁵.

Does Alachua County have zoning?

Yes. New development in unincorporated Alachua County must meet the county's Unified Land Development Code, which publishes zoning districts, use rules, and development standards such as setbacks, parking, signs, landscaping and subdivision requirements²⁶. A parent tract may be divided once without subdivision review only when the resulting lots meet the county's frontage, direct public-road access, minimum lot-size, driveway and recording conditions; every other lot split is a subdivision that must go through Development Review under Chapter 407, Article 8 of the ULDC, and any subdivision producing more than 2 lots from a parent parcel needs Development Review Committee approval⁴. On a single-family lot under 1 acre, the principal building's minimum setbacks are 10 feet front, 10 feet rear and 5 feet side; on a lot of 1 acre or more they are 15 feet front, 15 feet rear and 10 feet side²⁷. Single-family residential districts have a 35-foot maximum building height¹⁶. Multifamily developments have perimeter setbacks of 25 feet at the front and street side, 20 feet at the rear and 10 feet at the interior side, with an increased interior-side setback for taller buildings next to single-family residential uses²⁸. Maximum multifamily height varies by district: 35 feet in R-2, 45 feet in R-2a and 60 feet in R-3²⁹. Under the Family Homestead Exception, a Rural/Agriculture parent tract of at least 2 acres can yield a lot of at least 1 acre, with a 25-foot minimum front setback for the house³⁰³¹. In a Rural Cluster, a single-family lot served by a private well and septic tank needs at least 1 acre¹⁵. The county ULDC applies to unincorporated land. Inside Archer the city issues its own building permits and runs its own zoning³²⁶; inside Alachua the city administers its own Land Development Regulations⁷; inside Gainesville the city's Land Development Code governs zoning districts, permitted uses and development review⁵. Septic permits stay with the county health department for every address, city or not, including inside Archer, where city code defers to the state health department⁸³³.

How do septic permits work in Alachua County?

Septic (OSTDS) permits and inspections in Alachua County are handled by the Florida Department of Health in Alachua County¹⁰⁸. The state Department of Environmental Protection still enforces Florida's septic laws and rules even where the county health department issues the permit¹¹. You need a permit for a proposed installation, repair, modification or approval of an existing system³⁴. Soils matter here: only about 15.1% of Alachua County's soils rate as not severely limited for a conventional drain field, meaning most mapped soils have severe conventional-drain-field limitations and deserve an early site evaluation³⁵. Private well and septic systems are allowed on residential lots that meet the ULDC's lot-size table, state standards and local health department approval³⁶. New development or redevelopment within the county's Urban Cluster generally must connect when centralized water and sewer are available, subject to the stated exceptions³⁷. Call Environmental Health at 352-334-7930 before relying on a seller's description of an existing system or designing a new one³⁸.

Can you live in an RV, tiny home or accessory unit on your land in Alachua County?

Unincorporated Alachua County allows 1 RV or tiny house on wheels for living, sleeping and housekeeping on an individual legal lot in the A, A-RB and RM zoning districts, in place of an otherwise allowed primary home or accessory dwelling unit³⁹. The unit needs an issued address and zoning compliance permit, district setbacks, approved water and sewer or permitted septic connections, compliant electrical equipment, ground anchoring, alarms and recognized RV or tiny-house certification³⁹. An RV may also be occupied in an RM-1 travel recreational vehicle park and campground district or in designated areas under an approved management plan for a park, preserve or historic site⁴⁰. A manufactured or mobile home needs an onsite inspection for compliance with state installation standards before it gets a certificate of occupancy, and county zoning and site-development rules still apply⁴¹. While you build, a temporary placement permit from the county can allow a construction residence for an owner building a site-built home, valid only while the building permit is valid, and an emergency residence for up to 2 years after a fire or storm makes a home uninhabitable⁴². Alachua County allows one accessory dwelling unit in listed residential zoning districts and future land-use designations, with no minimum size and up to 1,700 square feet or 50% of the principal residence's gross square footage, whichever is greater⁴³. A properly permitted accessory dwelling unit may be rented short term if tourist-development taxes are paid and the owner lives in either home on the property while maintaining the homestead exemption⁴⁴. The zoning approval carries a $70 fee and comes before the building permit; on a rural property under five acres without central sewer, the Health Department must confirm that combined septic impact will not exceed 700 gallons per day¹⁷.

Building a home in Alachua County: what are the steps, in order?

1. Confirm your parcel's zoning district, setbacks and future land-use designation with Growth Management Planning & Development at 352-374-5249 before you design anything²³.
2. If you are not connecting to central sewer, get a site evaluation from the Florida Department of Health in Alachua County at 352-334-7930; on a Rural Cluster lot the minimum size for a well-and-septic lot is 1 acre³⁸¹⁵.
3. If your lot touches a mapped floodplain, get a flood zone determination from Alachua County Public Works at 352-337-6140 and a flood hazard area permit before you build⁴⁵¹⁸.
4. Apply for your building permit through the Building Division at 352-374-5243, with a site plan for driveway work or a full construction document set for a new home²²⁵.
5. Schedule inspections as work proceeds under the statewide Florida Building Code⁴⁶.
6. Start construction within the permit's 180-day validity period¹.
7. After final inspection of electrical, gas, mechanical, plumbing and fire-protection systems, the building official issues your certificate of occupancy²¹.

What should you check before you buy land in Alachua County?

All mapped land in Alachua County is at a slope of 15% or less, and about 65.8% of the county is wooded⁴⁷⁴⁸. Septic feasibility is a major variable: only about 15.1% of the county's soils rate as not severely limited for a conventional drain field, so order a site evaluation before assuming a standard system will work³⁵. Only about 0.5% of the county is federal land, but a buyer should still confirm whether a specific tract has conservation restrictions or protected areas⁴⁹. The nearest city of 100,000 or more is about 3 miles from the county center, and countywide population density is about 326.6 people per square mile, so rural parcels may still sit near substantial development⁵⁰⁵¹. Typical home insurance is about $2,159 per year, while the median property tax bill is about $2,623 per year at an effective rate near 1%⁵²⁵³⁵⁴. If the parcel is near a mapped flood zone, request a determination from Alachua County Public Works before closing because development in the floodplain requires a flood hazard area permit⁴⁵¹⁸. Confirm legal road access and whether a county right-of-way connection needs a driveway permit before treating an existing track as buildable access²⁵.

Watch-outs

• Alachua County sets no minimum size for a qualifying accessory dwelling unit, but we could not confirm a countywide minimum size for a principal home or a maximum lot-coverage rule; confirm both design limits with Growth Management Planning & Development at 352-374-5249⁵⁵²³.
• Well permitting in Alachua County depends on which water management district your parcel sits in: the St. Johns River district requires a permit mainly for wells 6 inches or larger in diameter, while the Suwannee River district requires a permit for any well; confirm your district with the county before you plan a well⁵⁶⁵⁷.

Sources

1. Building Permits, quoted and re-checked
2. Alachua County Building Division (growth-management.alachuacounty.us)
3. Land Development Code (ULDC), quoted and re-checked
4. Lot Splits, quoted and re-checked
5. Land Development Code, quoted and re-checked
6. Archer: Archer Comprehensive Plan Future Land Use Objective I.1 (Alachua County), quoted and re-checked
7. Alachua: Alachua Code, Sec. 4.4 Accessory uses and structures (Alachua County), quoted and re-checked
8. Onsite Sewage Disposal, quoted and re-checked
9. Land Development Code (ULDC), quoted and re-checked
10. Onsite Sewage Disposal (2026 county census)
11. Onsite Sewage Disposal, quoted and re-checked
12. Building Permits (2026 county census)
13. Building Permits, quoted and re-checked
14. Building Permits, quoted and re-checked
15. Unified Land Development Code, Chapter 403, quoted and re-checked
16. Unified Land Development Code, Chapter 403, quoted and re-checked
17. Accessory Dwelling Units, quoted and re-checked
18. Development Review & Flood Zone Information, quoted and re-checked
19. Building Codes, quoted and re-checked
20. Alachua County Building Code, quoted and re-checked
21. Alachua County Building Code, quoted and re-checked
22. Affidavit of Qualification for Nonresidential Farm Building Permit Exemption, quoted and re-checked
23. Alachua County Growth Management - Planning & Development (growth-management.alachuacounty.us)
24. Building Division Fee Schedule, quoted and re-checked
25. Building Permits, quoted and re-checked
26. Land Development Code (ULDC), quoted and re-checked
27. Unified Land Development Code, Chapter 403, quoted and re-checked
28. Unified Land Development Code, Multifamily Residential Standards, quoted and re-checked
29. Unified Land Development Code, Multifamily Residential Standards, quoted and re-checked
30. Unified Land Development Code, Chapters 400–410, quoted and re-checked
31. Unified Land Development Code, Chapters 400–410, quoted and re-checked
32. Archer: Archer Code Sec. 8-20 Building permit required (Alachua County), quoted and re-checked
33. Archer: Archer Code Sec. 32-123 Method of disposal required (Alachua County), quoted and re-checked
34. Septic Systems and Rebates, quoted and re-checked
35. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
36. growth-management.alachuacounty.us, quoted and re-checked
37. growth-management.alachuacounty.us, quoted and re-checked
38. Florida Department of Health in Alachua County - Environmental Health (alachua.floridahealth.gov)
39. Land Development Code (ULDC), quoted and re-checked
40. Unified Land Development Code, quoted and re-checked
41. Florida Statutes § 320.8285: Onsite inspection (Florida statewide rule), quoted and re-checked
42. Unified Land Development Code, quoted and re-checked
43. Accessory Dwelling Units, quoted and re-checked
44. Accessory Dwelling Units, quoted and re-checked
45. Alachua County Public Works - Development Review (Floodplain Administration) (alachuacounty.us)
46. Florida Statutes § 553.73, Florida Building Code, quoted and re-checked
47. Share of land at 15% slope or less: Bolthole Index county data
48. Wooded share of land: Bolthole Index county data
49. Federal land share: Bolthole Index county data
50. Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
51. Population density: Bolthole Index county data
52. Typical home insurance premium: Bolthole Index county data
53. Median property tax bill: Bolthole Index county data
54. Effective property tax rate: Bolthole Index county data
55. Unified Land Development Code, Chapters 400–410, quoted and re-checked
56. Well Permits, quoted and re-checked
57. Well Permits, quoted and re-checked

Written October 16, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.