HVAC Permit in Clark County, Washington
Permit required
Yes, a permit is required
Installing or replacing heating and cooling equipment
Issued byClark County Community Development, Building Safety
By Mario Bailey, verified against official sources
Quick answer
Clark County issues residential mechanical permits for heating and cooling work, with the county application covering furnaces, heat pumps, A/C and evaporative coolers, boilers, ductless mini splits, vent fans, water heaters and gas piping. For additions and new construction, heating and cooling permits are included in the ADS or NHC permit. Residential mechanical permits are applied for online through the county permit system; mechanical work on manufactured/mobile homes goes through Washington State Labor and Industries.
Typical threshold: Mechanical permits cover installation of heating and cooling equipment such as furnaces, heat pumps, A/C units, ductless mini splits and gas piping; for additions and new construction this work is included in the ADS or NHC permit.
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When a permit is usually needed
Installing or replacing heating and cooling equipment
What an HVAC permit costs in Clark County
How Clark County compares in Washington
No Washington 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 |
|---|---|---|
| Bellevue | Permit required | Flat single-family mechanical inspection fees per Table 8 of Ordinance 6879:... |
| Clark Countythis page | Permit required | Application rev 1.30.23: $94 issuance plus per-appliance fees including... |
| King County | Permit required | Mechanical installation-only permit is a flat $183 inspection fee covering up... |
| Pierce County | Permit required | Issue each mechanical permit fee $58.00, plus unit fees per equipment type... |
| Seattle | Permit required | Ducted HVAC systems are priced by project valuation with a $292 minimum |
| Snohomish County | Permit required | Filed as a Mech/Plbg residential trade permit priced from the PDS valuation... |
| Tacoma | Permit required | Standalone HVAC and mechanical permits run 2.81 percent of construction value... |
How to apply in Clark County
In Clark 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 Clark 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 Clark 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 Clark 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 Clark 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. Clark County Community Development, Building Safety sets the exact checklist for Clark County.
Where to apply in Clark County:
Clark County Community Development, Building Safety
- Public Service Center, 1300 Franklin St., Vancouver, WA 98660
- Phone: 564.397.2375
- Email: permitservices@clark.wa.gov
HVAC Permit in Clark County compared with nearby Washington localities
| Locality | Permit needed? | Threshold | What each Washington schedule says | Verified |
|---|---|---|---|---|
| Clark County | Permit required | Mechanical permits cover installation of heating and cooling equipment such as furnaces, heat pumps, A/C units, ductless mini splits and gas piping; for additions and new construction this work is included in the ADS or NHC permit. | Application rev 1.30.23: $94 issuance plus per-appliance fees including furnace or heat... | |
| Bellevue | Permit required | Not specified | Flat single-family mechanical inspection fees per Table 8 of Ordinance 6879: furnace up... | |
| King County | Permit required | Not specified | Mechanical installation-only permit is a flat $183 inspection fee covering up to six... | |
| Pierce County | Permit required | Not specified | Issue each mechanical permit fee $58.00, plus unit fees per equipment type (for example... | |
| Seattle | Permit required | Not specified | Ducted HVAC systems are priced by project valuation with a $292 minimum |
Inspections and closing out your permit
In Clark 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 Clark 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 Clark 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 Clark 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 Clark 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 Clark 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 Clark 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 Clark County permit portal or by phone at 564.397.2375.
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 Clark County
- Confirm the requirement. Yes, a permit is required. Typical threshold: Mechanical permits cover installation of heating and cooling equipment such as furnaces, heat pumps, A/C units, ductless mini splits and gas piping; for additions and new construction this work is included in the ADS or NHC permit. Usually needed: Installing or replacing heating and cooling equipment.
- Budget the fee. Application rev 1.30.23: $94 issuance plus per-appliance fees including furnace or heat pump $29, A/C or evaporative cooler $29, compressor or boiler $89, gas pipe 1-5 $89. Official fee schedule.
- Apply. In Clark 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 Clark County permit portal.
- Keep the office details handy. Clark County Community Development, Building Safety. Phone: 564.397.2375. Address: Public Service Center, 1300 Franklin St., Vancouver, WA 98660.
- Plan for inspections. In Clark 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 Clark County?
- Clark County issues residential mechanical permits for heating and cooling work, with the county application covering furnaces, heat pumps, A/C and evaporative coolers, boilers, ductless mini splits, vent fans, water heaters and gas piping. For additions and new construction, heating and cooling permits are included in the ADS or NHC permit. Residential mechanical permits are applied for online through the county permit system; mechanical work on manufactured/mobile homes goes through Washington State Labor and Industries. Always confirm with the Clark County Community Development, Building Safety before starting.
- How much does an HVAC permit cost in Clark County?
- Application rev 1.30.23: $94 issuance plus per-appliance fees including furnace or heat pump $29, A/C or evaporative cooler $29, compressor or boiler $89, gas pipe 1-5 $89. See the official fee schedule for current amounts.
- Where do you apply for an HVAC permit in Clark County?
- You can apply through the Clark County permit portal or contact the Clark County Community Development, Building Safety directly. The links are listed on this page.
- Can a homeowner pull an HVAC permit themselves in Clark County?
- Under Washington law (RCW 18.27.090(11), (12); RCW 19.28.261(1); RCW 18.106.150(1)): Washington lets homeowners do their own construction work, including the licensed trades, on property they own. RCW 18.27.090(12) exempts any person working on his or her own property from contractor registration, but the exemption does not apply if you do contractor type work for the purpose of selling, demolishing, or leasing the property, and the separate owner exemption in RCW 18.27.090(11) is lost if you sell or lease improved property owned less than 12 months. For electrical work, RCW 19.28.261 lets you wire your own residence, farm, or place of business without an electrician license, unless the work is on construction of a new building intended for rent, sale, or lease, or on property offered for sale within 12 months after you obtained it. RCW 18.106.150(1) gives the same kind of exemption for plumbing work at your own residence, farm, or place of business. These exemptions waive the license, not the permit: an owner doing electrical work still buys an L&I electrical work permit and passes inspection (WAC 296-46B-901), and building and plumbing permits still come from your local building department. Confirm how Clark County applies this before you apply.
From the Library
What else needs a permit in Clark 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 | It depends | Exempt only if the deck does not exceed 200 square feet, is not more than 30 inches above grade at any point, is not attached to a dwelling, does not serve a required exit door, and is not used for a hot tub or pool; all other decks require a permit. | Fees are established by county ordinance and calculated automatically during the... |
| Electrical Permit | Permit required | Electrical work in Washington requires a permit and inspection, with a few exceptions listed in chapter 296-46B-901 WAC; in unincorporated Clark County electrical permits are issued by state Labor and Industries, not the county. | No county fee |
| Fence Permit | It depends | Fences seven feet or less in height do not require a permit; fences over 7 feet in height require a Fence/Retaining Wall (FRT) permit. | Fees are established by county ordinance and calculated automatically during the... |
| Patio Permit | It depends | Patio and concrete slabs on the ground grade are exempt from permit but may not be built on easements; adding a patio cover or enclosing a covered patio requires a building permit under the ADS permit type. | Fees are established by county ordinance and calculated automatically during the... |
| Plumbing Permit | Permit required | A plumbing permit is required for installation of any plumbing fixtures, including water heaters, toilets and sinks. | Application rev 9.2.25: $94 issuance plus per-item fees including plumbing fixture/trap... |
| Pool Permit | It depends | A permit is required for any structure intended for swimming or recreational bathing that contains water over 24 inches deep, including in-ground, aboveground and on-ground pools, hot tubs and spas. | Fees are established by county ordinance and calculated automatically during the... |
| Roof Replacement Permit | Permit required | Re-roofing permits are required for all buildings in Clark County; a separate permit may be required if structural work such as replacing roof sheathing is necessary. | County handout rev 7.16.18: residential re-roofing permit $220 plus $94 issuance and... |
| Shed Permit | It depends | Sheds over 200 square feet require a building permit; sheds of 200 square feet or less are exempt if they meet setbacks and easements, but any size shed in a mobile home park or multi-family zone requires a permit. | Fees are established by county ordinance and calculated automatically during the... |
| Solar Permit | Permit required | Separate SOL permits are required for ground mounted units or panels mounted on existing buildings; in new construction the solar panels are included in the NHC or ADS permit. | Fees for separate SOL permits are based on construction value |
HVAC Permit in other Washington localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Clark County documents; the office above sets the local rules.
How this HVAC permit page for Clark County was verified. 3 official sources: clark.wa.gov, clark.wa.gov, clark.wa.gov; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Clark County Community Development, Building Safety. Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare HVAC Permit requirements across Washington localities
Washington rule changes