STATE LICENSE
ConditionalSouth Dakota Electrical Commission (Depar…
No South Dakota statute licenses heating, ventilation, or air-conditioning contractors as such. The licensed pieces of HVAC work belong to other trades: installing wiring or equipment for electric heat or power requires a State Electrical Commission license (SDCL 36-16-13), and the Plumbing Commission's appliance installation license covers connecting gas- or electric-powered equipment to water and waste systems (ARSD 20:53:01:01(1), 20:53:05:01).
Technicians who handle refrigerants need federal EPA Section 608 certification. HVAC installation is a realty improvement, so the business needs a DOR contractor's excise tax license and owes 2% on gross receipts. Mechanical licensing, where it exists, is municipal.
The state sets the license floor; the county or city permit office controls filing, inspections, and local rules wherever the job site sits.
With no state mechanical license, HVAC licensing and mechanical permits are local where they exist. Electrical work stays under the statewide Electrical Commission (cities may be stricter under SDCL 36-16-35) and plumbing-side connections under the Plumbing Commission (SDCL 36-25-16). Contractors post their CET license number with building permits (SDCL 10-46A-12.1).
The local offices section below names the exact permit desk for every South Dakota county on file.
Each row names the issuing authority, cost, timeline, citation, and status behind the requirement — verified against the official source.
Published fees from the issuing authorities, as of October 2026. Local permit fees vary by project and jurisdiction — the basis is stated where a flat number does not exist.
The wiring is Electrical Commission territory and water/waste hookups are Plumbing Commission territory; sub them or license for them.
Maintaining an oil burner or space heater that a licensed electrician installed needs no electrician's license (SDCL 36-16-16(6)).
With no state mechanical license, cities set their own mechanical licensing and permit rules.
A practical sequence for a new HVAC contractor in South Dakota. Actual agency processing times are noted in the ledger above.
Each item names the issuing authority, cycle, and citation.
Statutory consequences with their citations — not estimates, not “commonly cited” guesses.
Engaging in electrical contracting or performing licensed electrical work without a State Electrical Commission license, or failing to register or report wiring, is a crime; the commission may seek an injunction instead.
Engaging in business subject to the contractor's excise tax without obtaining the license is a crime; so is failing to file returns or pay the tax within 60 days of the due date.
Inside city limits, the city office listed here issues the permit; the county office serves unincorporated areas. Every office links to its official page.
Every fact in this file was checked against these official sources on October 2026.
Pending verification: Local mechanical/HVAC contractor licensing in Sioux Falls and Rapid City (reported but not confirmed on official city sources) · Whether the Plumbing Commission treats furnace, boiler, or humidifier water connections as appliance installation in practice — the rule definition was read, not any commission interpretation · Whether any state rule governs fuel-gas piping installation outside municipal codes · That DOR charges no fee to issue a contractor's excise tax license — SDCL 10-46A-16 says a license is valid 'without further payment of fees' and the January 2026 CET guide lists no fee, but neither states expressly that issuance is free
General information, not legal advice. Always confirm requirements, deadlines, and forms with the issuing authority before filing or contracting.
Store licenses, permits, policies, and renewal dates in one place.