Yes, a Gainesville site can use permeable resin-bound surfacing as part of its stormwater design when it's built over Rock Crete or another permeable base and an open-graded stone reservoir on soil that drains, with an engineer checking the depth to limestone and the water table first. On top of an existing slab it's a resurfacing finish: rain soaks the top layer and then runs off the concrete.
Gainesville's creeks, from Hogtown and Sweetwater Branch to Possum and Little Hatchet, receive stormwater from the streets around them, and the City's Clean Water Partnership warns that most of them have bacteria levels above state standards. Holding rain on site helps. Over karst, it has to be done with care.
Gainesville's stormwater assessment, retention credits and permits
Starting October 1, 2026, the City collects its stormwater fee as a special assessment on the property tax bill. The basis is impervious and semi-impervious area, with one Equivalent Residential Unit equal to 2,300 square feet. The City's definition of semi-impervious expressly includes porous concrete and asphalt pavements, gravel and lime rock, so don't expect a permeable surface to drop out of the calculation. On measured properties, though, semi-impervious area counts at half weight, while homes and duplexes pay a flat charge per dwelling unit. The City decides how a resin-bound surface is classified.
The other route to a lower bill is retention. Under the City's stormwater code, non-residential properties with approved on-site retention facilities can have their billable units reduced by a retention credit factor, and the new method extends retention credits to apartments, condominiums and mobile home parks. A permeable resin-bound area over a stone reservoir could be part of such a facility if the City accepts it; that's a review decision, not a given.
Construction and floodplain permits go through the City's Building Inspection Department under Chapter 30 of the Land Development Code. Larger projects also need an environmental resource permit, and depending on the drainage basin that may come from the St. Johns River or the Suwannee River Water Management District, so confirm which district covers the parcel.
Karst, sinks and clay layers: what to check before designing the base
Limestone sits close to the surface in parts of Alachua County, and sinks are part of the local landscape; Haile Sink and Alachua Sink appear on the local Clean Water Partnership's list of waterways. SJRWMD's Applicant's Handbook describes a Sensitive Karst Areas Basin in western Alachua County, reaching into southwest Gainesville, where Floridan aquifer limestone is at or near land surface and solution-pipe sinkholes can open in the bottom of stormwater basins. There it requires at least three feet of unconsolidated soil between the limestone and the bottom and sides of a basin, storage kept shallow with a flat bottom, and a maximum basin depth of ten feet.
Those rules are written for basins, but the logic carries to a permeable pavement reservoir: spread storage out, keep it shallow, and get borings that find the limestone surface before committing to infiltration. Elsewhere, clayey layers can slow drainage and call for an underdrain. About 23 percent of the city's land is in FEMA flood zones along its creeks, lakes and prairies, which the engineer will factor into where infiltrating sections go.
Where it fits in Gainesville
- Student housing and apartments near the University of Florida: parking stalls, walks and courtyards, now that apartments can seek retention credits under the City's new method.
- Duckpond, Pleasant Street and other older neighborhoods: replacement driveways and garden paths on lots shaded by live oaks.
- Midtown and downtown dining: patios and courtyards at grade.
- Churches, offices and medical buildings: low-speed parking areas paired with conventional drive aisles.
- Sites draining to Hogtown, Tumblin or Sweetwater Branch creeks: projects where owners want less polluted runoff reaching creeks the City is working to clean up.
Approvals in Gainesville and how Resin Rock fits in
Your engineer will coordinate City development and building review, the water management district permit and, for any fee credit, Public Works stormwater staff. Bring borings to limestone, the seasonal high water table, infiltration tests, storage and recovery calculations, and a maintenance plan. The City decides whether a permeable resin-bound area is part of an approved retention facility for credit purposes.
Resin Rock, based in Sarasota, supplies the resin binder, stone blends, trims and Rock Crete permeable sub-base, and provides technical data sheets. We don't install; we train and approve installers and can match Alachua County owners with one through find an installer.
Before you specify permeable resin-bound in Gainesville
- Find the limestone surface with borings before designing any infiltrating base.
- Confirm which water management district covers the site's drainage basin.
- Check whether the area falls in a FEMA flood zone along a creek, lake or prairie.
- Expect porous surfaces to be counted as semi-impervious, which the City bills at half weight on measured properties; a retention credit can lower the bill further.
- Keep reservoir depth shallow and spread storage across the site.
- Write a maintenance plan the City can review.
Common questions about permeable resin-bound in Gainesville
Will porous paving take my Gainesville property out of the stormwater assessment?
No. The City's assessment counts semi-impervious area, and its definition expressly includes porous concrete and asphalt pavements and gravel. On measured properties, semi-impervious area is billed at half weight, and a retention credit for an approved on-site facility can lower the bill further; credits are open to non-residential properties and, under the new method, apartments, condominiums and mobile home parks. Homes and duplexes pay a flat charge per dwelling unit.
Is infiltration safe over Gainesville's karst?
It can be, with the right design. In SJRWMD's sensitive karst areas, stormwater basins need at least three feet of soil between limestone and the basin bottom, and shallow, spread-out storage is preferred. A geotechnical engineer should locate the limestone, look for sinkhole indicators and decide whether a permeable reservoir, an underdrain or a lined section is appropriate.
How is the Gainesville stormwater fee collected now?
From October 1, 2026, the City collects it as a non-ad valorem special assessment on the property tax bill rather than as a monthly utility charge. Measured properties are billed in Equivalent Residential Units of 2,300 square feet, counting impervious area plus half of semi-impervious area, and most single-family homes and duplexes continue on flat per-unit charges.
Official sources for Gainesville
- City of Gainesville Stormwater Special Assessment
- City of Gainesville Floodplain Management
- Alachua County and Gainesville Clean Water Partnership: creeks
- SJRWMD ERP Applicant's Handbook Volume II (Sensitive Karst Areas, section 13.6)
Local rules change. We last checked these sources in October 2026. Confirm current requirements with the reviewing agency before you design, and treat this page as a starting point, not engineering or permitting advice.