HVAC Permit in Martin County, Florida
Permit required
Yes, a permit is required
Before work begins.
Issued byMartin County Building Department
By Mario Bailey, verified against official sources
Quick answer
Martin County lists heating and cooling systems among the projects that require a permit. Its exemption examples cover only portable heating, ventilation and cooling equipment, self-contained refrigeration systems with 10 pounds or less of refrigerant, and part replacements that do not alter the equipment's approval.
Who is pulling this permit?
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When a permit is usually needed
Before work begins.
What an HVAC permit costs in Martin County
How Martin 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... |
| Martin Countythis page | Permit required | Fee schedule effective July 1, 2026: construction costs under $25,000 pay a... |
How to apply in Martin County
In Martin 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 Martin 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 Martin 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 Martin 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 Martin 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. Martin County Building Department sets the exact checklist for Martin County.
Where to apply in Martin County:
Martin County Building Department
- 900 SE Ruhnke Street, Stuart, FL 34994
- Phone: (772) 288-5916
HVAC Permit in Martin County compared with nearby Florida localities
| Locality | Permit needed? | Threshold | What each Florida schedule says | Verified |
|---|---|---|---|---|
| Martin County | Permit required | Any size | Fee schedule effective July 1, 2026: construction costs under $25,000 pay a $75 building... | |
| 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 Martin 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 Martin 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 Martin 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 Martin 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 Martin 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 Martin 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 Martin 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 Martin County permit portal or by phone at (772) 288-5916.
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 Martin County
- Confirm the requirement. Yes, a permit is required. Usually needed: Before work begins.
- Budget the fee. Fee schedule effective July 1, 2026: construction costs under $25,000 pay a $75 building fee, a $25 plan review fee and $75 per inspection; the HB 803 permit exemption waiver for qualifying work under $7,500 is $75. Official fee schedule.
- Apply. In Martin 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 Martin County permit portal.
- Keep the office details handy. Martin County Building Department. Phone: (772) 288-5916. Address: 900 SE Ruhnke Street, Stuart, FL 34994.
- Plan for inspections. In Martin 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 Martin County?
- Martin County lists heating and cooling systems among the projects that require a permit. Its exemption examples cover only portable heating, ventilation and cooling equipment, self-contained refrigeration systems with 10 pounds or less of refrigerant, and part replacements that do not alter the equipment's approval. Always confirm with the Martin County Building Department before starting.
- How much does an HVAC permit cost in Martin County?
- Fee schedule effective July 1, 2026: construction costs under $25,000 pay a $75 building fee, a $25 plan review fee and $75 per inspection; the HB 803 permit exemption waiver for qualifying work under $7,500 is $75. See the official fee schedule for current amounts.
- Where do you apply for an HVAC permit in Martin County?
- You can apply through the Martin County permit portal or contact the Martin County Building Department directly. The links are listed on this page.
- Can a homeowner pull an HVAC permit themselves in Martin 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 Martin County applies this before you apply.
From the Library
What else needs a permit in Martin County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
Fee schedule effective July 1, 2026: construction costs under $25,000 pay a $75 building fee, a $25 plan review fee and $75 per inspection, for every permit type below. The fee column shows what differs by project.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Bathroom Remodel Permit | It depends | Finish work and fixture repairs versus a remodel | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Deck Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Electrical Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| EV Charger Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Fence Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Patio Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Plumbing Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Pool Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Roof Replacement Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Shed Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Solar Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
| Water Heater Permit | Permit required | Any size | The HB 803 permit exemption waiver for qualifying work under $7,500 is $75 |
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 Martin County documents; the office above sets the local rules.
How this HVAC permit page for Martin County was verified. 2 official sources: martin.fl.us, martin.fl.us; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Martin County Building Department. Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page