South Carolina / Greenville County
HVAC Permit in Greenville County, South Carolina
It depends
Sometimes, depending on the project
Before installing or changing out heating or cooling equipment, adding ductwork, or running a gas line.
Issued byGreenville County Building Safety (Planning and Code Compliance)
By Mario Bailey, verified against official sources
Quick answer
Greenville County requires a mechanical permit for HVAC work, including equipment change-outs: its Answer Book says mechanical permits are required for new equipment, change-outs and running a gas line, and its permit FAQ says all gas and HVAC work requires a permit. The only carve-outs are the statewide ones in S.C. Code 40-59-265, such as portable heating and cooling units, portable evaporative coolers and the replacement of minor parts, none of which covers replacing a furnace, condenser or heat pump.
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When a permit is usually needed
Before installing or changing out heating or cooling equipment, adding ductwork, or running a gas line.
What an HVAC permit costs in Greenville County
How Greenville County compares in South Carolina
| Jurisdiction | Permit needed? | Threshold |
|---|---|---|
| Charleston | It depends | Before a new HVAC system for a new building, a new or upgraded system for an existing... |
| Columbia | It depends | Before a standalone HVAC change out, new system installation or duct work, unless the... |
| Greenville Countythis page | It depends | Before installing or changing out heating or cooling equipment, adding ductwork, or... |
How to apply in Greenville County
In Greenville 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 Greenville 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 Greenville 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 Greenville 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 Greenville 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. Greenville County Building Safety (Planning and Code Compliance) sets the exact checklist for Greenville County.
Where to apply in Greenville County:
Greenville County Building Safety (Planning and Code Compliance)
- 301 University Ridge, Greenville County Square, Suite S-3100, Greenville, SC 29601
- Phone: 864-467-7060
- Email: permits@greenvillecounty.org
HVAC Permit in Greenville County compared with nearby South Carolina localities
| Locality | Permit needed? | Threshold | What each South Carolina schedule says | Verified |
|---|---|---|---|---|
| Greenville County | It depends | Before installing or changing out heating or cooling equipment, adding ductwork, or... | Mechanical Permit Fees: minimum fee per permit $72.00 | |
| Charleston | It depends | Before a new HVAC system for a new building, a new or upgraded system for an existing... | A $40.00 non-refundable application fee, which the schedule states "is in addition to... | |
| Columbia | It depends | Before a standalone HVAC change out, new system installation or duct work, unless the... | ...which covers 'Building, plumbing, gas, mechanical, electrical' at $20.00 for total... |
Inspections and closing out your permit
In Greenville 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 Greenville 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 Greenville 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 Greenville 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 Greenville 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 Greenville 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 Greenville 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 Greenville County permit portal or by phone at 864-467-7060.
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 Greenville County
- Confirm the requirement. Sometimes, depending on the project. Usually needed: Before installing or changing out heating or cooling equipment, adding ductwork, or running a gas line.
- Budget the fee. Mechanical Permit Fees: minimum fee per permit $72.00; line items include Furnace $36.00, Condenser $48.00, Heat Pump $84.00, Package Unit $84.00, Duct Work Only $36.00 and Gas Line only $36.00 (Residential Permit Fees schedule; no effective date printed). Official fee schedule.
- Apply. In Greenville 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 Greenville County permit portal.
- Keep the office details handy. Greenville County Building Safety (Planning and Code Compliance). Phone: 864-467-7060. Address: 301 University Ridge, Greenville County Square, Suite S-3100, Greenville, SC 29601.
- Plan for inspections. In Greenville 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 .
Permitting activity in Greenville County
In 2025, Greenville County authorized permits for 4,947 new residential housing units (4,222 single-family, 725 in multi-family buildings), valued at $2.0B, down from 5,575 the year before. That works out to about 8.5 permits per 1,000 residents.
Source: U.S. Census Bureau, Building Permits Survey, 2025 annual data · population 583,125.
Frequently asked questions
- Do you need an HVAC permit in Greenville County?
- Greenville County requires a mechanical permit for HVAC work, including equipment change-outs: its Answer Book says mechanical permits are required for new equipment, change-outs and running a gas line, and its permit FAQ says all gas and HVAC work requires a permit. The only carve-outs are the statewide ones in S.C. Code 40-59-265, such as portable heating and cooling units, portable evaporative coolers and the replacement of minor parts, none of which covers replacing a furnace, condenser or heat pump. Always confirm with the Greenville County Building Safety (Planning and Code Compliance) before starting.
- How much does an HVAC permit cost in Greenville County?
- Mechanical Permit Fees: minimum fee per permit $72.00; line items include Furnace $36.00, Condenser $48.00, Heat Pump $84.00, Package Unit $84.00, Duct Work Only $36.00 and Gas Line only $36.00 (Residential Permit Fees schedule; no effective date printed). See the official fee schedule for current amounts.
- How long does an HVAC permit take in Greenville County?
- Five-day processing period for permits to be issued, per the Building Safety notice (the Forms and Applications page notice still reads one to two weeks). Times can vary by workload and project scope, so confirm with the office.
- Where do you apply for an HVAC permit in Greenville County?
- You can apply through the Greenville County permit portal or contact the Greenville County Building Safety (Planning and Code Compliance) directly. The links are listed on this page.
- Can a homeowner pull an HVAC permit themselves in Greenville County?
- Under South Carolina law (S.C. Code Ann. 40-59-260(A), (B), (C), (E), (F); 40-59-265; 40-59-280; 40-59-20(6), (7); 40-59-30(A)): South Carolina licenses residential builders and residential specialty contractors under S.C. Code Title 40 Chapter 59, and 40-59-260 exempts the owner of record who builds for himself. The exemption applies only if the owner does the work himself, with his own employees, or with licensed contractors or registered entities, if the structure is intended for the owner's sole occupancy or occupancy by the owner's family and is not intended for sale or rent, and if the general public does not have access to it. The owner must personally appear and sign the building permit application, and the local permitting agency must hand over a disclosure statement whose statutory text reads in part: You must supervise the construction yourself. You may build or improve a one-family or two-family residence. The building must be for your own use and occupancy. It may not be built for sale or rent. The sale restriction is two years and is a presumption rather than a flat bar: 40-59-260(B) makes proof of sale or rent, or of offering for sale or rent, within two years after completion or issuance of a certificate of occupancy prima facie evidence that the project was undertaken for sale or rent, which forfeits the exemption and exposes the owner to the chapter's penalties. South Carolina then adds a step no other state in this wave has: 40-59-260(E) requires the owner to promptly record a notice with the register of deeds, indexed under the owner's name in the grantor index, stating that the building was constructed by the owner as an unlicensed builder, and failure to record revokes the statutory exemption. The exemption is from the licensing chapter, not from the permit, and 40-59-280 requires the building official to refuse a permit unless the applicant furnishes evidence of licensure, registration, or exemption. Confirm how Greenville County applies this before you apply.
From the Library
What else needs a permit in Greenville County
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 | It depends | Before moving or adding plumbing fixtures, adding circuits or changing walls in a bathroom | ...cost of the project."), plus trade fees: plumbing minimum fee per permit $72.00 and... |
| Deck Permit | It depends | deck area, for decks not more than 30 inches above grade at any point | ...work is priced on the Residential Permit Fees schedule by total valuation: "$1,000... |
| Electrical Permit | It depends | Before any electrical work beyond minor repairs, including service upgrades, meter... | Electrical Permit Fees: minimum fee per permit $72.00 |
| EV Charger Permit | It depends | Before installing a hardwired charger or a new 240-volt circuit or receptacle for an... | Electrical Permit Fees: minimum fee per permit $72.00 |
| Fence Permit | It depends | fence height | ...work is priced on the Residential Permit Fees schedule by total valuation: "$1,000... |
| Plumbing Permit | It depends | Before adding or relocating plumbing fixtures, replacing concealed pipe, or connecting... | Plumbing Permit Fees: minimum fee per permit $72.00 |
| Pool Permit | It depends | prefabricated swimming pools only | ...work is priced on the Residential Permit Fees schedule by total valuation: "$1,000... |
| Roof Replacement Permit | Permit required | Any size | Flat fee: the Residential Roofing Permit line is $108.00 under Miscellaneous Permit Fees... |
| Shed Permit | It depends | floor area of a one-story detached accessory structure | ...work is priced on the Residential Permit Fees schedule by total valuation: "$1,000... |
| Solar Permit | Permit required | Any size | Electrical schedule line Solar Panel per 5kw at $48.00, with the electrical minimum fee... |
| Water Heater Permit | Permit required | Any size | ...Permit Fees on the Residential Permit Fees schedule: Gas Water Heater $36.00 and... |
HVAC Permit in other South Carolina localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Greenville County documents; the office above sets the local rules.
How this HVAC permit page for Greenville County was verified. 2 official sources: greenvillecountysc.gov, greenvillecountysc.gov; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Greenville County Building Safety (Planning and Code Compliance). Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare HVAC Permit requirements across South Carolina localities