HVAC Permit in Charleston, South Carolina

Frequently asked questions

Do you need an HVAC permit in Charleston?

Charleston requires a mechanical trade permit for HVAC work, taken out either as a stand-alone permit or as a sub-permit under a building master permit, and the application form's work-type checkboxes reach repairs and mini-splits as well as new systems. What is carved out comes from state law rather than from the city: S.C. Code 40-59-265 exempts portable heating, ventilating and cooling appliances, portable evaporative coolers, steam, hot-water or chilled-water piping inside regulated equipment, self-contained refrigeration systems with ten pounds or less of refrigerant or motors of one horsepower or less, and the replacement of any minor part that does not alter the equipment's approval or make it unsafe. Nothing in that list covers replacing a furnace, condenser or air handler, so a normal residential system change needs a permit. Charleston works to the 2021 South Carolina Mechanical Code and the 2021 South Carolina Fuel Gas Code. Always confirm with the City of Charleston Permit Center, Development and Construction Services (Building Inspections Division) before starting.

How much does an HVAC permit cost in Charleston?

A $40.00 non-refundable application fee, which the schedule states "is in addition to the Mechanical Permit Fee," plus the Mechanical Permit Fee Table rate for "Mechanical - New, Alterations, Repairs and Replacements" of "$10.00 for the first $1,000 construction cost, plus $2.00 for each additional $1,000 or fraction thereof." Fuel gas is billed separately at $10.00 for one to four outlets and $2.00 for each additional outlet, again over a $40.00 application fee. Building and Trade Permit Fee Schedule approved by Ordinance Nos. 2017-131, 2019-064 and 2019-072, effective October 1, 2019. See the official fee schedule for current amounts.

How long does an HVAC permit take in Charleston?

Possible same-visit approval. "Standalone Trades (Residential & Commercial)" appear on the Permit Center's "Menu of 'Express' Permits (In Person Only)," with the caveat "Repairs and in-kind replacements only for Commercial," and approval "is never a guarantee.". Times can vary by workload and project scope, so confirm with the office.

Where do you apply for an HVAC permit in Charleston?

You can apply through the Charleston permit portal or contact the City of Charleston Permit Center, Development and Construction Services (Building Inspections Division) directly. The links are listed on this page.

Can a homeowner pull an HVAC permit themselves in Charleston?

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 Charleston applies this before you apply.