HVAC Permit in San Francisco, California
Permit required
Yes, a permit is required
Before installing or replacing heating or cooling equipment or the pipes and ducts that carry gas, hot air or cool air.
Issued bySan Francisco Department of Building Inspection (DBI)
By Mario Bailey, verified against official sources
Quick answer
San Francisco DBI issues mechanical permits, applied for online in PermitSF for work without plans, for cutting into or replacing pipes that carry water, gas, hot air or cool air. Mechanical work needs a separate permit from plumbing work, and DBI's fee schedule prices a residential furnace, hydronic heat or heat pump installation as its own category. A mechanical permit can be pulled by a C20 contractor (A or B licenses also qualify), or by the owner of a stand-alone single-family dwelling doing the work after seeing an inspector.
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When a permit is usually needed
Before installing or replacing heating or cooling equipment or the pipes and ducts that carry gas, hot air or cool air.
What an HVAC permit costs in San Francisco
How San Francisco 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 | ...permit scope, 'Mechanical Permit 18% of Building Permit Fees, $140.00... |
| Contra Costa County | Permit required | Land Development Fee Schedule S-002 D.6, "Mechanical Permit (Other) $75.00... |
| Fresno County | Permit required | Section 2510 Mechanical Code Fees, FY 2026-27: Issuing each permit $42.77 |
| Los Angeles | Permit required | ...equipment per LADBS Fee Sch.3 (7/2017), for example a gas furnace at $19... |
| Los Angeles County | Permit required | ...of Los Angeles Code, Ord No. 2013-0051), effective July 1, 2026: $41.35... |
| Orange County | Permit required | Mechanical Permit Application Flat Fee: $400 for FY 2024-25, $420 for FY... |
| San Franciscothis page | Permit required | ...(furnace, hydronic heat, heat pump)" "(maximum two inspections)"... |
How to apply in San Francisco
In San Francisco, 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 San Francisco, 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 San Francisco, 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 San Francisco, 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 San Francisco, 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. San Francisco Department of Building Inspection (DBI) sets the exact checklist for San Francisco.
Where to apply in San Francisco:
San Francisco Department of Building Inspection (DBI)
- Permit Center, 49 South Van Ness Avenue, San Francisco, CA 94103
- Phone: (628) 652-3200
- Email: dbicustomerservice@sfgov.org
HVAC Permit in San Francisco compared with nearby California localities
| Locality | Permit needed? | Threshold | What each California schedule says | Verified |
|---|---|---|---|---|
| San Francisco | Permit required | Any size | ...gas appliance (furnace, hydronic heat, heat pump)" "(maximum two inspections)"... | |
| Alameda County | Permit required | Any size | ...of a building permit scope, 'Mechanical Permit 18% of Building Permit Fees, $140.00... | |
| Contra Costa County | Permit required | Any size | Land Development Fee Schedule S-002 D.6, "Mechanical Permit (Other) $75.00 minimum."... | |
| Fresno County | Permit required | Any size | Section 2510 Mechanical Code Fees, FY 2026-27: Issuing each permit $42.77 | |
| Los Angeles | Permit required | Any size | ...piece of equipment per LADBS Fee Sch.3 (7/2017), for example a gas furnace at $19... |
Inspections and closing out your permit
In San Francisco, 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 San Francisco: 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 San Francisco: 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 San Francisco: 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 San Francisco: 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 San Francisco: 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 San Francisco: 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 San Francisco permit portal or by phone at (628) 652-3200.
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 San Francisco
- Confirm the requirement. Yes, a permit is required. Usually needed: Before installing or replacing heating or cooling equipment or the pipes and ducts that carry gas, hot air or cool air.
- Budget the fee. Table 1A-C Plumbing/Mechanical Issuance and Inspection Fees ("July 2026", applying "to all permits issued on and after July 12, 2026"): "CATEGORY 1M" "Single Residential Unit – mechanical gas appliance (furnace, hydronic heat, heat pump)" "(maximum two inspections)" $290; "CATEGORY 2M" mechanical gas appliances for residential construction with 6 dwelling units or guest rooms or less, $420. Official fee schedule.
- Apply. In San Francisco, 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 San Francisco permit portal.
- Keep the office details handy. San Francisco Department of Building Inspection (DBI). Phone: (628) 652-3200. Address: Permit Center, 49 South Van Ness Avenue, San Francisco, CA 94103.
- Plan for inspections. In San Francisco, 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 San Francisco?
- San Francisco DBI issues mechanical permits, applied for online in PermitSF for work without plans, for cutting into or replacing pipes that carry water, gas, hot air or cool air. Mechanical work needs a separate permit from plumbing work, and DBI's fee schedule prices a residential furnace, hydronic heat or heat pump installation as its own category. A mechanical permit can be pulled by a C20 contractor (A or B licenses also qualify), or by the owner of a stand-alone single-family dwelling doing the work after seeing an inspector. Always confirm with the San Francisco Department of Building Inspection (DBI) before starting.
- How much does an HVAC permit cost in San Francisco?
- Table 1A-C Plumbing/Mechanical Issuance and Inspection Fees ("July 2026", applying "to all permits issued on and after July 12, 2026"): "CATEGORY 1M" "Single Residential Unit – mechanical gas appliance (furnace, hydronic heat, heat pump)" "(maximum two inspections)" $290; "CATEGORY 2M" mechanical gas appliances for residential construction with 6 dwelling units or guest rooms or less, $420. See the official fee schedule for current amounts.
- Where do you apply for an HVAC permit in San Francisco?
- You can apply through the San Francisco permit portal or contact the San Francisco Department of Building Inspection (DBI) directly. The links are listed on this page.
- Can a homeowner pull an HVAC permit themselves in San Francisco?
- Under California law (Business & Professions Code 7044(a)-(b); Business & Professions Code 7031.5): California exempts an owner from contractor licensing under section 7044 when they personally perform all the work on their own property, or any work they do not perform themselves is done by their own employees paid only wages, and none of the improvements are intended or offered for sale. It also exempts an owner who directly contracts with licensed contractors for each trade, as long as no more than four of the single-family residential structures involved are intended or offered for sale in a calendar year; this route does not apply if the owner instead contracts with a general contractor for the construction. A homeowner may also improve their own principal residence without a license, as long as the work is done before any sale, they have actually resided there for the 12 months before completion, and they have not used this exemption on more than two structures more than once in any three-year period. 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 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 civil penalty of up to $500. Confirm how San Francisco applies this before you apply.
From the Library
What else needs a permit in San Francisco
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Bathroom Remodel Permit | Permit required | Any size | ...(Table 1A-C, "CATEGORY 1P" includes "a single kitchen or bathroom remodel", $290)... |
| Deck Permit | It depends | height of the deck walking surface above grade | ...Fee is the Plan Review Fee plus the Permit Issuance Fee." For a valuation of $1 to... |
| Electrical Permit | Permit required | Any size | ...up to 10,000 sq. ft.": "Up to 10 outlets and/or devices (1 inspection)"... |
| EV Charger Permit | It depends | Before installing, altering or modifying any part of the electrical system for an EV... | ...1 residential wiring applies ("Up to 10 outlets and/or devices (1 inspection)"... |
| Fence Permit | It depends | fences in a side or rear yard; the figure is 3 feet for a fence in the front yard | ...Fee is the Plan Review Fee plus the Permit Issuance Fee." For a valuation of $1 to... |
| Plumbing Permit | Permit required | Any size | ...or a single kitchen or bathroom remodel" "(maximum two inspections)"... |
| Pool Permit | It depends | prefabricated pools with walls entirely above grade, accessory to a one- or two-family dwelling (Group R-3) | ...Fee is the Plan Review Fee plus the Permit Issuance Fee." For a valuation of $1 to... |
| Roof Replacement Permit | It depends | area reroofed in any 12-month period, with no roof sheathing installed, repaired or removed | DBI's reroofing page: "$514 and up for single-family homes and duplexes." and "$714 and... |
| Shed Permit | It depends | one-story detached storage shed or playhouse; a 10-foot height limit also applies | ...Fee is the Plan Review Fee plus the Permit Issuance Fee." For a valuation of $1 to... |
| Solar Permit | Permit required | Any size | ...Installations: "Solar Photovoltaic Systems" "10 KW rating or less"... |
| Water Heater Permit | Permit required | Any size | the residential single-unit plumbing category is "CATEGORY 1P" at $290 and "CATEGORY... |
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 San Francisco documents; the office above sets the local rules.
How this HVAC permit page for San Francisco was verified. 2 official sources: sf.gov, sf.gov; fee schedule: official document. Last checked by Mario Bailey, not confirmed with San Francisco Department of Building Inspection (DBI). Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare HVAC Permit requirements across California localities