HVAC Permit in St. Johns County, Florida
Permit required
Yes, a permit is required
Before installing, altering, or replacing a furnace, boiler, heater, or air conditioning system in unincorporated St. Johns County
Issued byBuilding Services Division, Growth Management Department
By Mario Bailey, verified against official sources
Quick answer
St. Johns County's own Building Permit Application states that a separate permit must be secured for furnaces, boilers, heaters, tanks, and air conditioners, and the county's fee schedule carries a dedicated Mechanical Permit Fees section priced by system valuation. This applies to unincorporated St. Johns County; St. Augustine and St. Augustine Beach operate their own building departments. No county-published exemption for small, portable, or window-unit air conditioners was found.
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When a permit is usually needed
Before installing, altering, or replacing a furnace, boiler, heater, or air conditioning system in unincorporated St. Johns County
What an HVAC permit costs in St. Johns County
How St. Johns County compares in Florida
No Florida jurisdiction we have verified sets a size threshold for this permit, so what actually differs between them is the fee.
| Jurisdiction | Permit needed? | Typical fee |
|---|---|---|
| Alachua County | Permit required | Flat fee: Res Mechanical Alt/Repair $110.00, per the Building Fee Schedule... |
| Brevard County | Permit required | ...Permit Application fee table lists a Building Code Review fee of $75.00... |
| Broward County | Permit required | ...(air conditioning and ventilation) permit is the greater of a $125... |
| Charlotte County | Permit required | At application: $90 flat building fee unless valuation is $50,000 or more... |
| Clay County | Permit required | ...Permits (Section 208.4), effective January 1, 2025: minimum fee... |
| Collier County | Permit required | ...Review Fees: "Residential Air Conditioning Change out permits, $100.00... |
| St. Johns Countythis page | Permit required | Mechanical Permit Fees (F.S. 553.80): Permit Issuance $11.00 with a minimum... |
How to apply in St. Johns County
In St. Johns County, a residential HVAC (mechanical) permit application must identify the covered equipment and scope of work, since installing, altering, or replacing a heating or cooling system is regulated work that cannot start until the application is submitted and the permit issued. The equipment itself must be picked by a real sizing calculation rather than a rule of thumb.
What most HVAC permit applications include:
- For St. Johns County, a mechanical permit is required before anyone may install, alter, repair, remove, convert, or replace a heating, ventilating, or air conditioning system regulated by the code, and the work may not begin until the application is submitted and the permit is issued (IRC R105.1).
- For St. Johns County, the application identifies the specific equipment being installed, such as a furnace, heat pump, or air conditioner, since the unit must be installed according to its listing and the manufacturer's installation instructions (IRC M1401.1).
- For St. Johns County, the proposed equipment location must leave the clearances needed to clean coils and replace filters, blowers, motors, and controls after installation (IRC M1401.2).
- For St. Johns County, the application carries the equipment sizing basis: ACCA Manual J building loads and Manual S equipment selection, or another approved sizing method, not a rule of thumb (IRC M1401.3).
- For a split system, the work covered by the permit includes refrigerant suction line insulation, since the piping is inspected against that standard once installed (IRC M1411.6).
General submittal guidance from International Residential Code (IRC), 2021 edition, Chapter 1 (Permits) and Chapter 14 (Heating and Cooling Equipment and Appliances). Source. Building Services Division, Growth Management Department sets the exact checklist for St. Johns County.
Where to apply in St. Johns County:
Building Services Division, Growth Management Department
- 4040 Lewis Speedway, St. Augustine, FL 32084
- Phone: 904-827-6800
- Email: bldcodes@sjcfl.us
HVAC Permit in St. Johns County compared with nearby Florida localities
| Locality | Permit needed? | Threshold | What each Florida schedule says | Verified |
|---|---|---|---|---|
| St. Johns County | Permit required | Any size | Mechanical Permit Fees (F.S. 553.80): Permit Issuance $11.00 with a minimum permit fee... | |
| Alachua County | Permit required | Any size | Flat fee: Res Mechanical Alt/Repair $110.00, per the Building Fee Schedule effective... | |
| Brevard County | Permit required | Any size | ...Permit Application fee table lists a Building Code Review fee of $75.00 for the... | |
| Broward County | Permit required | Any size | Mechanical (air conditioning and ventilation) permit is the greater of a $125 minimum... | |
| Charlotte County | Permit required | Any size | At application: $90 flat building fee unless valuation is $50,000 or more (then 0.004 x... |
Inspections and closing out your permit
In St. Johns County, mechanical work gets a rough in inspection after the ductwork, refrigerant lines, and gas piping are in but before they are covered or concealed, followed by a final inspection that confirms the equipment operates correctly and its clearances, combustion air, and condensate disposal are in place. A straight equipment changeout with no new ductwork commonly gets a single final inspection instead of a separate rough in trip.
- In St. Johns County: rough inspection of the mechanical and gas systems must be made before the work is covered or concealed, before fixtures or appliances are set or installed, and before the framing inspection (IRC R109.1.2).
- In St. Johns County: where a cooling coil is added to an existing warm air furnace, the rough in confirms the coil is not installed upstream of the heat exchanger unless the furnace is listed for it, and that the blower can handle the added static pressure (IRC M1411.2).
- In St. Johns County: the rough in and final both confirm the appliance access opening and working space are large enough to service the unit (IRC M1305.1).
- In St. Johns County: at final inspection, the inspector verifies the equipment has adequate combustion air, with openings kept clear for the distance the code requires (IRC M1402.3).
- In St. Johns County: final inspection also checks that the condensate line drains to an approved point of disposal with the required slope and does not create a nuisance (IRC M1411.3).
- In St. Johns County: for a straight equipment changeout with no new ductwork, many permit offices require only a single final inspection, while a new installation still gets a rough in inspection before the final (common local inspection practice).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the St. Johns County permit portal or by phone at 904-827-6800.
Inspection sequence from International Residential Code (IRC), 2021 edition, Section R109 (Required Inspections) and Chapter 14 (Heating and Cooling Equipment and Appliances). Source. An open permit left un-inspected can surface later in a title search or home sale.
Your HVAC Permit checklist for St. Johns County
- Confirm the requirement. Yes, a permit is required. Usually needed: Before installing, altering, or replacing a furnace, boiler, heater, or air conditioning system in unincorporated St. Johns County.
- Budget the fee. Mechanical Permit Fees (F.S. 553.80): Permit Issuance $11.00 with a minimum permit fee of $35.00; valuation $0 to $5,000: $24.00; $5,001 and above: $19.00 plus $2.00 for each additional $1,000, per St. Johns County's Schedule of Fees and Services, Exhibit A (amended 07/21/2026). Official fee schedule.
- Apply. In St. Johns County, a residential HVAC (mechanical) permit application must identify the covered equipment and scope of work, since installing, altering, or replacing a heating or cooling system is regulated work that cannot start until the application is submitted and the permit issued. The equipment itself must be picked by a real sizing calculation rather than a rule of thumb. Start at the St. Johns County permit portal.
- Keep the office details handy. Building Services Division, Growth Management Department. Phone: 904-827-6800. Address: 4040 Lewis Speedway, St. Augustine, FL 32084.
- Plan for inspections. In St. Johns County, mechanical work gets a rough in inspection after the ductwork, refrigerant lines, and gas piping are in but before they are covered or concealed, followed by a final inspection that confirms the equipment operates correctly and its clearances, combustion air, and condensate disposal are in place. A straight equipment changeout with no new ductwork commonly gets a single final inspection instead of a separate rough in trip.
Compiled from the official sources on this page. Last checked .
Frequently asked questions
- Do you need an HVAC permit in St. Johns County?
- St. Johns County's own Building Permit Application states that a separate permit must be secured for furnaces, boilers, heaters, tanks, and air conditioners, and the county's fee schedule carries a dedicated Mechanical Permit Fees section priced by system valuation. This applies to unincorporated St. Johns County; St. Augustine and St. Augustine Beach operate their own building departments. No county-published exemption for small, portable, or window-unit air conditioners was found. Always confirm with the Building Services Division, Growth Management Department before starting.
- How much does an HVAC permit cost in St. Johns County?
- Mechanical Permit Fees (F.S. 553.80): Permit Issuance $11.00 with a minimum permit fee of $35.00; valuation $0 to $5,000: $24.00; $5,001 and above: $19.00 plus $2.00 for each additional $1,000, per St. Johns County's Schedule of Fees and Services, Exhibit A (amended 07/21/2026). See the official fee schedule for current amounts.
- Where do you apply for an HVAC permit in St. Johns County?
- You can apply through the St. Johns County permit portal or contact the Building Services Division, Growth Management Department directly. The links are listed on this page.
- Can a homeowner pull an HVAC permit themselves in St. Johns County?
- Under Florida law (F.S. 489.103(7)(a)-(c)): Florida lets you pull your own permit as an owner-builder under section 489.103(7), Florida Statutes, which exempts property owners from the contractor licensing law when they act as their own contractor and provide direct, onsite supervision of all work not performed by licensed contractors. The exemption covers building or improving a one-family or two-family residence or a farm outbuilding for your own occupancy or use, and commercial buildings only up to a $75,000 cost, and the property may not be built or improved for sale or lease. If you sell or lease the property within 1 year after completing the work, the law presumes it was built for sale or lease, which violates the exemption. To qualify, you must personally appear and sign the building permit application and sign a state-prescribed disclosure statement acknowledging that you are the party legally and financially responsible for the construction, that you must provide direct, onsite supervision, and that unlicensed people you use must be your own employees, bringing federal tax withholding and workers' compensation obligations. You may not hire an unlicensed person to act as your contractor and may not delegate supervision to anyone who is not licensed for the work being done; if these requirements are violated, the local permitting agency shall withhold final approval, revoke the permit, or pursue unlicensed-activity remedies. A separate narrow branch of the exemption also lets an owner take over and complete a permit on a one-family or two-family residence when the original contractor substantially completed the project. Confirm how St. Johns County applies this before you apply.
From the Library
What else needs a permit in St. Johns County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Deck Permit | Permit required | Any size | ...fall under the general Building Services Fees table: Permit Issuance Fee $14.00... |
| Electrical Permit | Permit required | Any size | Electrical Permit Fees (F.S. 553-80): Permit Issuance Fee $11.00, plus itemized charges... |
| Fence Permit | Permit required | Any size | ...fall under the general Building Services Fees table: Permit Issuance Fee $14.00... |
| Patio Permit | Permit required | Any size | ...fall under the general Building Services Fees table: Permit Issuance Fee $14.00... |
| Plumbing Permit | Permit required | Any size | Plumbing Permit Fees (F.S. 553-80): Permit Issuance Fee $11.00 with a minimum permit fee... |
| Pool Permit | Permit required | pool surface area per the LDC regulated-pool definition, which also uses a 2 foot depth test | Swimming Pool Fees (F.S. 553-80): Permit Issuance $11.00 |
| Roof Replacement Permit | Permit required | Any size | ...fall under the general Building Services Fees table: Permit Issuance Fee $14.00... |
| Shed Permit | Permit required | Any size | ...fall under the general Building Services Fees table: Permit Issuance Fee $14.00... |
| Solar Permit | Permit required | Any size | Solar Permit Fees (F.S. 553.80): Permit Issuance $11.00 with a minimum permit fee of... |
HVAC Permit in other Florida localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not St. Johns County documents; the office above sets the local rules.
How this HVAC permit page for St. Johns County was verified. 2 official sources: sjcfl.us, sjcfl.us; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Building Services Division, Growth Management Department. Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page