HVAC Permit in Fresno County, California
Permit required
Yes, a permit is required
Before replacing or installing a furnace, air conditioner, heating appliance or flue vent in unincorporated Fresno County
By Mario Bailey, verified against official sources
Quick answer
Fresno County issues mechanical permits under Title 15 Chapter 15.12, which adopts the California Mechanical Code including its Division II Administration by reference, and Section 2510 of the Master Schedule of Fees prices them appliance by appliance with a separate permit issuance charge. An HVAC install or replacement is on the county's list of permits that do not require plans: the submittal is the application plus completed CF1R energy forms obtained through a HERS rater. Even a comfort cooling window unit has its own fee line. This applies to unincorporated Fresno County only, not to the City of Fresno, the City of Clovis or the county's other incorporated cities.
Who is pulling this permit?
Apply yourself
Hire it out
Before you sign, ask the contractor:
- Who pulls the permit, you or me, and is the permit fee included in the bid?
- Which inspections will this job need, and who meets the inspector on site?
- Is your contractor license active in this locality, and under which business name?
When a permit is usually needed
Before replacing or installing a furnace, air conditioner, heating appliance or flue vent in unincorporated Fresno County
What an HVAC permit costs in Fresno County
How Fresno County compares in California
No California 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 |
|---|---|---|
| Alameda County | Permit required | Building Inspection Department Service Fee Schedule (Schedule A, effective... |
| Contra Costa County | Permit required | Land Development Fee Schedule S-002 D.6, "Mechanical Permit (Other) $75.00... |
| Fresno Countythis page | Permit required | Section 2510 Mechanical Code Fees, FY 2026-27: Issuing each permit $42.77 |
| Los Angeles | Permit required | Itemized per piece of equipment per LADBS Fee Sch.3 (7/2017), for example a... |
| Los Angeles County | Permit required | Mechanical Code Fee Schedule (Title 29 of the County of Los Angeles Code, Ord... |
| Orange County | Permit required | Mechanical Permit Application Flat Fee: $400 for FY 2024-25, $420 for FY... |
| Riverside County | Permit required | Residential Mechanical (BME-RMEC): $274.30 fixed fee, per Appendix A to... |
How to apply in Fresno 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:
- 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).
- 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).
- The proposed equipment location must leave the clearances needed to clean coils and replace filters, blowers, motors, and controls after installation (IRC M1401.2).
- 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. Department of Public Works and Planning, Development Services and Capital Projects Division, Building and Safety sets the exact checklist for Fresno County.
Where to apply in Fresno County:
Department of Public Works and Planning, Development Services and Capital Projects Division, Building and Safety
- 2220 Tulare Street, Suite A, Fresno, CA 93721 (Development Services and Capital Projects Division; the offices are in Annex A and Annex B of the Fresno County Plaza at Tulare and M streets)
- Phone: 559-600-4570 (plan check and permit information); 559-600-4560 (building inspection); 559-600-4131 (24 hour inspection request line)
- Email: PlanCheckBuildingCode2@fresnocountyca.gov
Inspections and closing out your permit
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.
- 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).
- 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).
- The rough in and final both confirm the appliance access opening and working space are large enough to service the unit (IRC M1305.1).
- 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).
- 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).
- 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 Fresno County permit portal or by phone at 559-600-4570 (plan check and permit information); 559-600-4560 (building inspection); 559-600-4131 (24 hour inspection request line).
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 Fresno County
- Confirm the requirement. Yes, a permit is required. Usually needed: Before replacing or installing a furnace, air conditioner, heating appliance or flue vent in unincorporated Fresno County.
- Budget the fee. Section 2510 Mechanical Code Fees, FY 2026-27: Issuing each permit $42.77; Replacement, repair or installation of each heating appliance or flue vent $42.77; Each comfort cooling window unit $13.22; Each comfort cooling system less than 7 tons $42.77; Each comfort cooling system 7 tons to 14 tons $58.53; Installation of a gas piping system, 1 to 5 outlets $32.64 and $5.91 for each additional outlet; minimum mechanical permit fee $68.66. Where a Building, Mechanical, Electrical and Plumbing permit are all obtained on one application form, Section 2505 reduces them by 5 percent. Official fee schedule.
- Apply. 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 Fresno County permit portal.
- Keep the office details handy. Department of Public Works and Planning, Development Services and Capital Projects Division, Building and Safety. Phone: 559-600-4570 (plan check and permit information); 559-600-4560 (building inspection); 559-600-4131 (24 hour inspection request line). Address: 2220 Tulare Street, Suite A, Fresno, CA 93721 (Development Services and Capital Projects Division; the offices are in Annex A and Annex B of the Fresno County Plaza at Tulare and M streets).
- Plan for inspections. 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 Fresno County?
- Fresno County issues mechanical permits under Title 15 Chapter 15.12, which adopts the California Mechanical Code including its Division II Administration by reference, and Section 2510 of the Master Schedule of Fees prices them appliance by appliance with a separate permit issuance charge. An HVAC install or replacement is on the county's list of permits that do not require plans: the submittal is the application plus completed CF1R energy forms obtained through a HERS rater. Even a comfort cooling window unit has its own fee line. This applies to unincorporated Fresno County only, not to the City of Fresno, the City of Clovis or the county's other incorporated cities. Always confirm with the Department of Public Works and Planning, Development Services and Capital Projects Division, Building and Safety before starting.
- How much does an HVAC permit cost in Fresno County?
- Section 2510 Mechanical Code Fees, FY 2026-27: Issuing each permit $42.77; Replacement, repair or installation of each heating appliance or flue vent $42.77; Each comfort cooling window unit $13.22; Each comfort cooling system less than 7 tons $42.77; Each comfort cooling system 7 tons to 14 tons $58.53; Installation of a gas piping system, 1 to 5 outlets $32.64 and $5.91 for each additional outlet; minimum mechanical permit fee $68.66. Where a Building, Mechanical, Electrical and Plumbing permit are all obtained on one application form, Section 2505 reduces them by 5 percent. See the official fee schedule for current amounts.
- Where do you apply for an HVAC permit in Fresno County?
- You can apply through the Fresno County permit portal or contact the Department of Public Works and Planning, Development Services and Capital Projects Division, Building and Safety directly. The links are listed on this page.
- Can a homeowner pull an HVAC permit themselves in Fresno County?
- Under California law (Business & Professions Code 7044(a)-(b); Business & Professions Code 7031.5): California exempts an owner-builder from contractor licensing when the owner personally performs the work, or uses only wage employees, on their own property and does not intend the improvements for sale. A homeowner may also directly hire licensed trade contractors for up to four single-family residences a year, or improve their own principal residence without a general contractor's license, as long as they have actually lived there for the 12 months before the work is finished. Selling a self-built structure within one year of completion creates a rebuttable presumption that it was built for sale, which defeats the exemption, and selling five or more structures within a year makes that presumption conclusive. Separately, every city or county that requires a building permit must also require the applicant to file a signed statement giving their contractor license number or the basis of their claimed exemption; a false or missing statement carries a $500 civil penalty. Confirm how Fresno County applies this before you apply.
From the Library
What else needs a permit in Fresno 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 | Not specified | No flat deck permit fee is published. |
| Electrical Permit | Permit required | Not specified | Section 2511 Electrical Code Fees, FY 2026-27: Issuing permits $42.77 each |
| Fence Permit | It depends | Fences not over 7 feet high are on the county's published list of work exempt from a building permit | The Master Schedule of Fees publishes no flat fence permit fee. |
| Patio Permit | Permit required | Not specified | No flat patio permit fee is published. |
| Plumbing Permit | Permit required | Not specified | Section 2512 Plumbing Code Fees, FY 2026-27: Alteration, repair or addition of a drain... |
| Pool Permit | It depends | Prefabricated pools accessory to a Group R-3 occupancy are exempt from a building permit only when they are less than 24 inches deep, hold not more than 5,000 gallons, and are installed entirely above ground | Special Services Fees item 21, 'Installation of private swimming pool or spa includes... |
| Roof Replacement Permit | Permit required | Not specified | Special Services Fees item 16, 'Re-roofing of existing buildings including pre-roof... |
| Shed Permit | It depends | One-story detached accessory structures used as tool and storage sheds, playhouses and similar uses are exempt from a building permit when the floor area is not greater than 120 square feet | For a shed between 120 and 240 square feet the county charges for the Item No. |
| Solar Permit | Permit required | Not specified | The Master Schedule of Fees has no solar or photovoltaic line item anywhere in Section... |
HVAC Permit in other California localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Fresno County documents; the office above sets the local rules.
Verified by a person against the sources above on , not confirmed with Department of Public Works and Planning, Development Services and Capital Projects Division, Building and Safety. Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare HVAC Permit requirements across California localities
Permit office
Department of Public Works and Planning, Development Services and Capital Projects Division, Building and Safety
559-600-4570 (plan check and permit information); 559-600-4560 (building inspection); 559-600-4131 (24 hour inspection request line)Permit portal