Express car wash site plan in Hillsborough County, Florida

A model project in unincorporated Hillsborough County

This page is a model project: an express exterior tunnel car wash on 1 to 1.5 acres, set against the code of unincorporated Hillsborough County, Florida, to show how the county's rules shape a car wash site plan. It is not a client project, and every hearing record cited below is another applicant's case.

Hillsborough publishes its rules, fees and hearing record: the Land Development Code (LDC) and the Development Review Procedures Manual (DRPM) on Municode, itemized fee schedules, application pages, and zoning staff reports on the county's Legistar site ^{[8, 9, 10, 11, 3]}. The LDC in force is Supplement 58, codified through Ord. No. 26-8 (adopted January 15, 2026), with an online update of August 17, 2026 ^[8]. One section of the code is written for car washes, Sec. 6.11.121, and it governs the CN district alone ^[12]; elsewhere the layout answers to the use table, the access, buffer, noise and stormwater rules, and the conditions written into each Planned Development (PD). Pasco County is the comparison for saturation policy: on September 17, 2024 its commissioners voted 5-0 to make new car washes a conditional use with a 1.5-mile proximity test ^{[13, 14]}.

For the statewide view, see car wash site plans in Florida and site plans in Florida; for the metro, site plans in Tampa; for standards across jurisdictions, the car wash site plan hub and car wash and gas station regulations by state. The same asset under a Texas Specific Use Permit is the Mansfield express car wash case, and every model is listed under case studies.

At a glance

Under the table's legend, a conditional use needs no public hearing unless its Article VI standard says otherwise ^[1]. The CN clause has a history. Its earlier text (Ord. No. 09-62, eff. 2-1-2010) allowed self-service washes only; the 2019 amendment, Ord. No. 19-23, added automated washes ^{[12, 18]}. The current Municode text controls over the older wording the elaws mirror still shows ^[12]. Read literally, the amended clause admits an automated tunnel in CN if the tunnel is roofed and walled on at least two sides, and a Zoning Interpretation ($1,274.78) is the county's instrument for settling that reading ^[10]. The Part 6.11 standards add to the rest of the code rather than replace it, and staff check them during development review without extra procedural steps unless a use is flagged (Sec. 6.11.01) ^[19].

Approval path

Every approval in order, from the county's published process, fee pages and staff reports. Where the record gives no fee, timeline or seal, the cell says so.

The zoning fee page was last modified 3/26/2025, and a Fastrack surcharge of 25% applies with management authorization ^[10]. The site development fee page was last modified 7/8/2025 ^[11].

The hearing stage is the best-documented clock. Staff reports show ZHM April 15, 2024 to BOCC June 11, 2024 (PD 23-0780), ZHM July 22, 2024 to BOCC September 10, 2024 (MM 24-0678) and ZHM August 19, 2024 to BOCC October 8, 2024 (PD 24-0579), about 7 to 8 weeks in each of the 2024 samples; an earlier case, PD 22-0719, ran from ZHM January 17, 2023 to BOCC March 7, 2023 ^{[2, 3, 4, 29]}. Before the hearing, MM 25-0920 was filed on 06/04/2025 and heard by the ZHM on September 15, 2025, about 3.4 months later ^[21]. Added together, the sampled cases put a PD at roughly 5 months to entitlement, a figure derived from records rather than a published standard ^[21].

The BOCC's review is restricted to the record as defined in Ordinance 92-05 ^[21]. Parties who appeared or submitted evidence at the ZHM hearing, and designated representatives of registered neighborhood organizations within 1 mile, have standing before the board ^[30]. The plan and the evidence therefore have to be complete at the ZHM hearing, because the Department receives the ZHM's recommendation 15 business days later and the board decides on that record ^{[20, 21]}.

Design standards

A SWFWMD file letter states the impervious thresholds in plain terms: the "net allowable increase of impervious surface area on the project site is 9,000 square-feet, of which a maximum of 4,000 square feet can be subjected to vehicular traffic without requiring a permit" ^[31]. The county's own parking ratio and stall dimensions are taken from the current code edition when the plan is drawn; this page does not restate them from an older supplement.

Provisions that bind the layout

Drive-in service stacking, LDC Sec. 6.04.01.G: a development with drive-in service has to set its service area far enough back from the road that waiting vehicles are stored inside the property, so that a backup neither blocks the service nor interferes with traffic on the highway ^[27]. Driveway throat, same section: driveway length follows the stacking length expected for entering and exiting vehicles at the peak period, and a driveway that will be signalized has its length set by a traffic study of expected traffic and queues ^[27].

Equipment noise, EPC Rule Ch. 1-10 (agency summary):

"Air Conditioning, Pumps and Compressor noise source standards apply at any time day or night. This equipment must meet 55 decibels on the A-Scale as an Leq for a 10-minute period, measured at a distance of at least 40 feet across a residential real property line." ^[5]

Access on a state road, standard PD condition (PD 23-0780):

"No vehicular access to the proposed PD shall be permitted except as otherwise provided for herein these conditions, and all such access shall be subject to FDOT review and permitting." ^[2]

Corridor preservation, MM 24-0678, Condition 9:

"the developer shall designate up to 2 feet of right of way preservation along the project frontage on Sheldon Road. Building setbacks shall be calculated from the future right-of-way line." ^[3]

Wetlands, MM 24-0678, Condition 12 (EPC):

"The size, location, and configuration of the wetlands may result in requirements to reduce or reconfigure the improvements depicted on the plan." ^[3]

The same staff report template carries two rules that govern how the plan is read. Where the notes or graphics on the site plan conflict with a zoning condition or the LDC, "the more restrictive regulation shall apply," and LDC standards named in the conditions are read as "the regulations in effect at the time of preliminary site plan/plat approval" ^[3]. Staff also quote Comprehensive Plan FLUE Policy 1.4, which lists the elements of compatibility: height, scale, mass and bulk of structures, pedestrian or vehicular traffic, circulation, access and parking impacts, landscaping, lighting, noise, odor and architecture, and adds that "Compatibility does not mean 'the same as.'" ^{[3, 32]}. MM 24-0678 is not a car wash; its conditions come from the county's staff report template, created 8-17-21 ^[3].

Stacking benchmarks from other codes

The model sizes its queue by the Sec. 6.04.01.G test above, reviewed through access management and, for a signalized driveway, a traffic study ^[27]. Codes that publish a count give the scale. Pembroke Pines, Florida (§ 155.508) requires 8 entrance and 3 exit spaces for an automatic wash, 18 entrance and 5 exit spaces for a full-service wash, 1 space per vacuum, and no tunnel entrance or exit facing adjacent residential property, a rule that does not apply across a right of way ^[33]. Across the codes that set a count, the mode is 8 to 10 spaces per tunnel lane at 9 x 18 or 9 x 20 ft, which works out to 180 to 200 ft of queue per lane ^{[34, 35, 36]}.

Noise, water and pretreatment

EPC sets its limits by receiver type, and on a car wash site the dryer exit and the central vacuum producer are the sources that control. Measured data from studies elsewhere shows the scale: a Lawrence Township, New Jersey sound study recorded a 15 hp dryer at 95.8 dBA at 1 m and tunnel exits at 91 to 92.6 dBA ^[37], and a Cranford, New Jersey report measured blowers at about 68 dBA at 50 ft from the entrance, with an automatic door bringing that to about 50 dBA ^[38]. The EPC text does not classify vacuum turbines expressly; treating them as pumps and compressors, held to 55 dBA at 40 ft, is a conservative reading rather than a stated rule ^[5]. Against a 55 dBA night limit at a residential receiver, door and exit orientation are layout decisions, not equipment details.

The county enforces SWFWMD year-round water restrictions, which cover car washing as an outdoor use ^[39], and the SWFWMD Modified Phase III Extreme Water Shortage Order was extended through March 31, 2027, as reported by Pasco County ^[40]. Florida DEP publishes a closed-loop recycle best-practice guide under which spent process water goes to a DEP-permitted facility ^[41]. For the design and cost side of reclaim, see water conservation in car wash design.

The International Carwash Association reports that "Greater than 99 percent of professional car washes discharge effluent to a sanitary sewer" ^[42]. In Hillsborough the Public Utilities Industrial Pretreatment Program permits industrial dischargers, and its Grease Management program "conducts scheduled and unannounced inspections at non-permitted facilities (i.e. food service establishments, automotive repair and maintenance garages, car wash facilities, and commercial laundries)" under Ch. 120 (Ord. 06-31) ^[26]. EPC itself states: "We do not require permits if car wash water is disposed via sanitary sewer. However, the sewer authority has an approval process for connection to sewer." ^[43]. Palm Beach County shows the operating terms a Florida utility attaches: annual cleaning, sampling every six months, and oil and grease of 100 mg/L or less, with a surcharge when exceeded ^[44]. The preliminary plan reserves the interceptor location; the engineer of record sizes the device.

Constraints that resize the site

Determination: as proposed and as resized

The model program as proposed is an express exterior conveyor tunnel with a vacuum canopy field and pay-station stacking lanes on 1 to 1.5 acres. No car wash rezoning or PD decision appears in the Hillsborough record reviewed for this model, so there is no county record of a tunnel program cut down in review, and this page states no "after" count. What the code and the staff report template do fix is how each element moves.

Site data and yield

Program benchmarks for a tunnel wash come from out-of-state filings and are illustrative only. A 2025 Fresno, California filing, out of state, shows a 3,500 sq ft tunnel with a 16-stall vacuum area and a 21 ft parapet ^[50]. In other out-of-state records, a Mister Car Wash in Santa Maria, California sits on 0.92 acres with a 5,381 sf tunnel building (staff report of September 6, 2023) ^[51]; Blue Wave Express in Pittsburg, California has 1.36 acres, a 100-ft tunnel, three pay lanes and 22 vacuum stalls ^[52]; and Davis Express in Davis, California has 1.74 acres, a 5,758 sf building and 21 vacuum bays ^[53]. Across those out-of-state submittals, programs show 12 to 22 vacuum stalls on parcels of 0.92 to 1.74 acres, consistent with the 1 to 1.5 acre model ^{[50, 51, 52, 53]}.

Yield is the count of vacuum stalls and stacking spaces left after those rows are satisfied. The page does not compute one from a rule of thumb.

Comparable approvals and policy records, 2021 to 2026

No car wash rezoning or PD decision appears in the Hillsborough record reviewed for this model. The Hillsborough rows are the county's car wash related record and procedural analogs on the same kind of corridor; the rest are the Florida saturation record in Pasco, Cape Coral, Punta Gorda and Collier County.

Read together, the decisive car wash actions in this record are legislative. Pasco moved every new stand-alone wash into conditional-use review ^{[13, 14]}; Cape Coral answered saturation with a moratorium and then with locational, enclosure and residential adjacency rules ^{[58, 61]}; Collier County capped the car wash share of a commercial subdistrict at 5,000 sq ft ^[63]. In Hillsborough the closest analogs show where a car wash PD would be tested: FDOT access on US 92 ^{[29, 46]}, corridor preservation ^{[3, 29]} and community plan consistency ^[29]. Pasco's planning director counted 25 freestanding car washes and approximately 72 different types of opportunities to wash a car, as reported by the Tampa Bay Times ^[64]. Before siting in Pasco, the developer reads the adopted text of new Sec. 1106 for how the 1.5-mile test is measured; the Pasco LDC on Municode is Supp. 21 Update 1, codified through Ord. 26-19 of May 19, 2026 ^{[55, 65]}.

Board behavior matters as much as the code. A zoning tracking service reports a 7-0 BOCC denial of a Northola Avenue townhome rezoning despite approval recommendations from staff, the Planning Commission and the ZHM; it is not a car wash case, and it is cited for board behavior only ^[66]. Compare the Mansfield case, where car wash approvals run through Specific Use Permit findings.

Cost and phasing benchmarks

The county totals are the sum of published line items ^{[10, 11]}:

These exclude building, impact, mobility, utility capacity, SWFWMD and FDOT fees. For how the preliminary plan itself is priced, see site plan cost.

Typical phasing, as practice rather than code: due diligence and the pre-submittal conference; zoning entitlement (none on a CG or CI parcel; roughly 5 months for a PD, derived from sampled records); Preliminary Site Development and the ERP in parallel; construction plans, utility and pretreatment approvals; building permit and construction; then off-site improvement acceptance, as at Fletcher and Rome, and the certificate of occupancy ^{[21, 54]}. Stormwater is the variable most likely to move the schedule; see stormwater as a site plan variable.

Submittal anatomy

Staff reports reproduce the applicant's "Proposed Site Plan" partial and full sheets in Sections 2.4 and 8.0, so the applicant's plan enters the public hearing record ^{[3, 2]}. PD plan sets carry graphic sheets that staff label "non-regulatory," with only the regulatory sheet certified ^[68]. A rendering shown at the hearing therefore sits outside the conditions; where neighbors or staff object to the look of the building or the vacuum canopy, as Pasco residents did with the "gaudy" critique, a view drawn at the plan's dimensions answers the objection; see car wash rendering.

Conditions and handoff

What survives the hearing in Hillsborough is a set of PD conditions written against the certified plan: access "subject to FDOT review and permitting," right-of-way preservation with setbacks from the future line where the Corridor Preservation Plan applies, a 20 ft buffer with Type B screening, enhanced frontage trees, the EPC wetland line, and a plan cleaned of concept labels ^{[2, 3, 29, 68]}. Where the plan's notes conflict with a condition, the more restrictive rule applies ^[3]. A later minor change to the PD is administrative, at $405.22; a minor modification costs $4,484.15 and a major modification $9,226.73 ^[10]. In Pasco, the "test case" at Prospect Road and Clinton Avenue shows the other way conditions get set: design standards and layout negotiated with the county before the hearing ^[14].

The handoff is the split in the submittal table. The preliminary site plan carries the layout, circulation, queue, buffers, the future right-of-way line and the site data table; the client's engineer of record adds grading, drainage, utility layout, access design, stormwater calculations, the ERP package, the pretreatment design and the construction drawings, and the architect of record the building permit set ^{[11, 25]}. See preliminary versus final site plans for how the two sets relate, the Gwinnett County gas station case for a Southeast county special-use hearing on fuel retail, and the gas station site plan hub. Market context for the tunnel format is in car wash development in 2026.

By Viola Sauer, Principal, Innowave Studio