Kentucky contractor licenses: what the Department of Housing, Buildings and Construction licenses, and what it does not

Kentucky is one of the states where a plumber, an electrician and an HVAC mechanic all answer to the same state agency, the Department of Housing, Buildings and Construction (HBC). That makes it easier to learn than states that leave everything to cities, but the requirements are very different from trade to trade, and a few items are easy to miss: the permit that comes before an HVAC install, the pesticide license for lawn treatments, and the local occupational license tax. This page walks through each trade with the statute behind it. This is general information and not legal advice; forms and fees shift, so verify them with the agency first.

Who licenses which trade in Kentucky?

HBC's own home page lists the groups it licenses or certifies as plumbers, electricians, boiler contractors, sprinkler and fire alarm contractors, and building inspectors. The statutes add HVAC. For the LLC, workers' comp and sales tax side, see our Kentucky startup page.

Electricians and electrical contractors: KRS 227A

Kentucky licenses three levels. KRS 227A.020 bars anyone who is not licensed from presenting themselves as an electrical contractor, master electrician or electrician. It also bars unlicensed people from doing the work unless they are under the direct supervision of a licensed electrician or master electrician who is present on the site.

KRS 227A.060 sets the requirements, as read in October 2026:

• Electrical contractor: an application fee of no more than $200 plus the exam fee, a passing exam score, proof of compliance with workers' compensation and unemployment insurance laws, and general liability insurance of at least $1,000,000.
• Master electrician: an application fee of no more than $100, 16,000 hours of verifiable experience since age 16, and the exam. A training course or two years of teaching can replace 4,000 hours, and an associate's degree or diploma in electrical technology can replace 6,000.
• Electrician: an application fee of no more than $50, 8,000 hours of experience, and the exam. A training course, an associate's degree or two years of teaching can replace 4,000 hours.
• Provisional electrician license: for someone with at least six years of experience at 2,080 hours a year. It is nonrenewable, valid up to one year, and the holder must pass the exam inside that year.

Military electrical experience can count toward the master and electrician requirements, with a DD-214 or a commanding officer's statement. Our electrician licensing guide explains the general path.

Two points matter for businesses that cross jurisdictions. KRS 227A.020 says the state electrical law supersedes city and county ordinances regulating electricians, master electricians and electrical contractors, while leaving zoning and occupational payroll taxes alone. And KRS 227A.030 lets unlicensed nonresident electricians work in temporary, emergency or industrial shutdown situations, but they must apply for a license after 10 days of work in Kentucky, and cannot work more than 30 days in a calendar year without applying. A homeowner may install or repair wiring on their own real property.

Plumbers: KRS Chapter 318

KRS 318.030 prohibits anyone from engaging in plumbing unless they hold an active master plumber's license or a journeyman plumber's license issued by HBC. The same section requires any person, firm or corporation engaging in plumbing to maintain general liability insurance of not less than $250,000 and to show compliance with workers' compensation and unemployment insurance laws. Proof of insurance must reach HBC before an active master license is issued or renewed, and no license is valid without it.

Plumbing licenses expire on the last day of the licensee's birth month (KRS 318.054). A master or journeyman who lets a license lapse can revive it with the renewal fee, a revival fee and proof of continuing education, and the license cancels by operation of law if fees are not paid within 180 days. KRS 318.100 bars anyone from advertising as a licensed master or journeyman plumber without the license. The chapter does not apply to farmsteads (KRS 318.015).

Local governments can adopt the Kentucky State Plumbing Code and issue their own permits, and may collect occupational license fees from plumbing businesses (KRS 318.140). Our plumber licensing guide has the national view.

HVAC: license first, then a permit for each initial system

KRS 198B.656 bars anyone from claiming to be, or advertising as, a master HVAC contractor, journeyman mechanic or apprentice without the matching license or certificate, and bars practicing HVAC contracting without meeting the chapter's requirements. KRS 198B.658 sets the qualifications:

• Master contractor: at least 18, a U.S. citizen or authorized resident alien, at least two years of experience (as a journeyman under a master, as a contractor in Kentucky or elsewhere, or as a licensed mechanical engineer), and an exam.
• Journeyman: at least 18, at least two years in the trade under a master contractor or equivalent documented work elsewhere, and an exam.
• Apprentice: a certificate issued when the person registers with HBC.

Before anyone installs an initial HVAC system, KRS 198B.6671 requires a permit application, and no installation may begin until it is filed. The permit must show the work, the owner, the property and, where a master is required, the master license number. No permit or inspection is required for window units, space heaters, or systems outside buildings designed for human occupancy.

The exemptions in KRS 198B.674 matter for small shops: an individual owner working on property owned and occupied by the owner, a person installing or servicing residential window air conditioners, a person cleaning duct work who does not install or repair the system, and electrical-unit service on an HVAC system. Kentucky will license a person from another state with substantially equal requirements and equal privileges, on terms the department sets (KRS 198B.666). Local governments that did not have HVAC permit programs before January 1, 2007 cannot add their own inspection or permit requirements (KRS 198B.6673).

Lawn treatments and pest control: Department of Agriculture

Mowing is unlicensed. Applying pesticides to another person's land for hire is not. KRS 217B.070 bars anyone from applying pesticides to the lands of another without a pesticide operator's license. The fee is $100 a year, the applicant must hold a valid certification in the category, and the applicant must be registered as a dealer or employed by someone who is. Employees who apply pesticides for the operator need an applicator's license (KRS 217B.080), with a $25 fee, valid certification and supervision by a licensed operator.

Structural pest control, including termite and fumigation work, needs its own examinations and licenses, and those licenses expire annually (KRS 217B.515). KRS 217B.180 exempts a person using hand-powered equipment on nonrestricted pesticides for their own household lawn and yard or a neighbor's, as long as they do not hold themselves out as being in the business and take no pay beyond trading personal services. Our pest control license guide covers the national picture.

Other state-licensed work: sprinklers, septic and home inspection

• Fire protection sprinklers. KRS 198B.560 requires a license or certificate for preparing technical drawings, installing, repairing, altering, extending, maintaining or inspecting a fire protection sprinkler system. Limited-area systems on a domestic water supply with 10 sprinkler heads or fewer in one structure are excluded.
• Septic installers. KRS 211.357 directs the Cabinet for Health and Family Services to certify installers of on-site sewage disposal systems. A licensed master plumber is certified automatically, and a probationary certificate converts to full certification after five inspected installations.
• Home inspectors. KRS 198B.712 requires a license to advertise or work as a home inspector. Applicants need to be 18, hold a high school diploma or equivalent, complete a board-approved training course, pass the exam and carry general liability coverage of at least $250,000 naming the Board of Home Inspectors as certificate holder. KRS 198B.726 bars cities and counties from adding their own home inspector license, though they may impose an occupational license tax.

Trades without a state license, and the local piece

HBC does not list painting, cleaning, mowing or handyman work, and the Secretary of State's startup checklist points owners to local occupational license fees set by counties and cities. Those taxes are set locally, so ask the city or county clerk where you work what applies. Sales tax is the other piece: KRS 139.200 taxes lawn care, snow removal, residential cleaning and window cleaning at 6%, as covered in our sales tax table. KRS 217B.270 bars cities and counties from adopting rules on pesticide sale or use, including licensing and certification, so a city cannot add its own pesticide license on top of the state's.

Lawn-care owners should also read our Kentucky lawn care startup page.

A short list before you take a Kentucky job

1. Match the work to the table above. A water heater swap is plumbing, a new condenser is HVAC with a permit, and a panel upgrade is electrical.
2. Confirm each worker's license or registration with HBC, and keep your insurance certificates current. Plumbing, electrical and structural pest work each carry their own minimum.
3. Apply for the HVAC installation permit before the first day of an initial installation.
4. If any worker sprays, check the operator and applicator licenses and your bond or insurance.
5. Ask the city or county clerk about occupational license taxes.

This page summarizes statutes as read in October 2026. Lawmakers amend these chapters often, and HBC sets fees and exam details by regulation, so confirm the current rule with the agency before you file.

Frequently asked questions