The University of Florida has over 55,000 students. That number doesn’t shrink. And every year, Gainesville homeowners add more rental units, more garage conversions, more backyard cottages trying to capture a market that never stops growing.
Florida SB 943, effective July 1, 2025, just made that easier for virtually every single-family lot in the city.
I am Engineer Wasim of Site Plans Online USA. If you’re a Gainesville property owner thinking about an ADU, the legal landscape just shifted in your favor. The permit still requires a site plan. We prepare it.
What a Site Plan Means in Gainesville
A site plan is a scaled drawing of your property showing lot boundaries, existing structures, and proposed work with all setback dimensions labeled. A building permit is a legal document that gives you permission to start construction at an agreed upon location, in accordance with approved drawings and specifications.
You will need to submit a site plan if you want to build a driveway, construction drawings if you’re building an addition, or a whole set of construction documents for a new home. Every permit type has its own documentation requirements.
Gainesville vs. Alachua County Two Different Systems
City of Gainesville Building Inspection Division — Properties inside Gainesville city limits fall under the City’s Department of Sustainable Development. The City uses its own permitting portal.
Alachua County Growth Management — All Alachua County applications submit electronically through the Citizenserve permitting portal at citizenserve.com/alachuacounty. Create a user account with an email and password. Phone: 352-374-5243.
Properties in unincorporated areas surrounding Gainesville fall under Alachua County Growth Management with different requirements, fees, and timelines than the City.
A Gainesville mailing address does not always mean City of Gainesville jurisdiction. We pull your parcel record before drawing begins.
Alachua County Setback Requirements
For standard R-1 single-family residential zones:
| Setback | Standard R-1 |
|---|---|
| Front | 25 ft |
| Rear | 25 ft |
| Interior side | 7.5 ft |
| Corner lot — street side | 15 ft |
| Accessory structures | 5 ft rear and side |
| Pool — water edge to rear | 5 ft minimum |
| Pool — water edge to side | 5 ft minimum |
| Fence — rear and side | 6 ft maximum |
City of Gainesville zone setbacks vary by district. Verify your specific zone with the City’s Department of Sustainable Development.
ADU in Gainesville What Florida SB 943 Changed
The City of Gainesville allows one attached AND one detached ADU per lot in most residential zoning districts by right. Plan review takes 3–4 weeks when using pre-approved free plans.
The City of Gainesville launched a free ADU plans initiative in May 2025, providing pre-approved construction drawings at no cost to homeowners. City Architect Sarit Sela and Deputy Chief Plans Examiner Linda Maze designed these plans specifically for local zoning and setback requirements. Using them reduces plan review time significantly.
For Alachua County: One ADU is allowed per principal residence in most residential zoning districts. Accessory units have no minimum size and may be a maximum of 1,700 square feet of heated/cooled area or 50% of the primary residence gross square footage, whichever is greater.
ADU applications in Alachua County submit through Citizenserve. The zoning permit fee is $70 and requires a site plan, floor plan, and ADU affidavit.
Tree Ordinance What Triggers Documentation
Gainesville has a tree protection ordinance. Significant trees typically 12 inches or greater diameter at breast height may require tree survey documentation when permits affect them. The City’s Tree Conservation Area designations protect certain mature trees. Some site plans require additional documentation before the permit application is accepted.
We flag tree ordinance requirements for applicable Gainesville orders.
Historic Districts in Gainesville
Gainesville has several designated historic districts: Duckpond, Pleasant Street, and Northeast/Southeast Historic Districts. Exterior changes in designated districts require Historic Preservation review before the building permit is approved.
NOT HVHZ
Gainesville and Alachua County are not in the High-Velocity Hurricane Zone. Standard Florida Building Code applies. No Miami-Dade NOA required.
F.S. 515.29 — Pool Barrier Compliance
Florida Statute 515.29 requires a minimum 48-inch barrier around all residential pools. Alachua County adopted a swimming pool code as part of Ordinance 02-01. Your Gainesville pool site plan must show barrier location, height (48 inch minimum), gate details (self-closing, self-latching, outward-swinging), and latch height (54 inches minimum).
F.S. 553.792 — 10-Day Correction Deadline
Once the City of Gainesville or Alachua County issues a correction notice, you have 10 business days to respond. We turn corrections around within 12 hours.
Why Site Plans Get Rejected in Gainesville
Wrong portal — City of Gainesville and Alachua County Citizenserve are two separate systems.
Building Setback Affidavit missing — A Building Setback Affidavit is required in Alachua County and must be electronically signed for e-recording.
Tree documentation missing — Properties near significant trees or Tree Conservation Areas requiring additional survey documentation.
ADU zoning permit missing — For Alachua County ADUs, the $70 zoning permit must be approved before the building permit is submitted.
Historic district review not obtained — Exterior changes in designated districts require Historic Preservation review first.
Pricing and Turnaround
| Project Type | Starts From | Delivery |
|---|---|---|
| Fence, shed | $79 | 12 hours |
| Pool, deck | $149 | 12–24 hours |
| Home addition, garage | $149 | 24 hours |
| ADU | $249 | 24–48 hours |
| Commercial PE-stamped | Contact us | 3–5 business days |
FAQs
Does the City of Gainesville offer free ADU plans?
Yes, The City of Gainesville launched its free ADU plans initiative in May 2025, providing pre-approved construction drawings at no cost to homeowners. These plans were designed specifically for local zoning and setback requirements, reducing plan review time to 3–4 weeks.
What is Alachua County’s Citizenserve portal?
All Alachua County building permit and ADU applications submit electronically through Citizenserve at citizenserve.com/alachuacounty. Create a user account to apply. Phone: 352-374-5243.
How does Florida SB 943 affect ADU permitting in Gainesville?
SB 943 (effective July 1, 2025) requires Gainesville and Alachua County to allow ADUs on most single-family lots. The City allows one attached AND one detached ADU per lot by right in most residential districts. Alachua County allows ADUs up to 1,700 sq ft or 50% of the primary residence, whichever is greater.
What is the ADU size limit in Alachua County?
Accessory units have no minimum size and may be a maximum of 1,700 square feet of heated/cooled area or 50% of the gross square footage of the principal residence, whichever is greater.
Does the tree ordinance affect my permit application?
It can. Significant trees (12+ inch diameter) may require tree survey documentation. Properties near Tree Conservation Areas may need additional documentation. We flag this for applicable orders.
Is Gainesville in HVHZ?
No. Gainesville and Alachua County are not designated HVHZ. Standard Florida Building Code applies without HVHZ overlay requirements.
Does Alachua County require a Building Setback Affidavit?
Yes, A Building Setback Affidavit is required and must be electronically signed for e-recording through the Citizenserve portal.
How long does permit review take in Gainesville?
Using the City’s free pre-approved ADU plans: approximately 3–4 weeks. Custom designs: longer. Alachua County zoning approval: 2–4 weeks, followed by building permit review.
Can you prepare plans for Newberry or High Springs?
Yes, Both are in Alachua County. Newberry pool and fence permits, High Springs residential permits we prepare site plans for all Alachua County municipalities.
What if my Gainesville permit is rejected?
Use our Permit Rejection Analyzer to identify every correction item. Send the notice we update within 12 hours at no extra charge.
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