Quick answer: Idaho draws a sharp line between a license and a registration. Only three trades hold a true state license, all issued by the Division of Occupational & Professional Licenses (DOPL): plumbers (Title 54, Ch. 26), electricians (Ch. 10) and HVAC installers (Ch. 50) - each requiring documented experience and a competency exam. Everyone else who performs construction - general contractors, roofers, painters, carpenters, most landscapers and handymen - must register with DOPL under the Idaho Contractor Registration Act (Title 54, Ch. 52). Registration is not a license: there is no exam, but you must carry $300,000 general-liability insurance. Cleaners perform no construction and need neither.
The table below shows which of the common trades hold a state license, which only need to register, and which need nothing at the state level in Idaho.
Which trades need a license in Idaho?
| Trade | State license required? | Licensing body |
|---|---|---|
| Plumber | Yes | State license required - Idaho State Plumbing Board / DOPL, Title 54, Ch. 26. Apprentice, journeyman and plumbing contractor credentials; journeyman needs experience plus a competency exam. |
| Electrician | Yes | State license required - Idaho Electrical Board / DOPL, Title 54, Ch. 10. Apprentice, journeyman, master and electrical contractor licenses; journeyman needs 4 years / 8,000 hours plus an exam. |
| HVAC | Yes | State license required - Idaho HVAC Board / DOPL, Title 54, Ch. 50. Certificate of competency (journeyman / contractor); journeyman needs 4 years / 8,000 hours plus 576 classroom hours and an exam. |
| General Contractor | Registration | No competency license, but must register with DOPL under the Idaho Contractor Registration Act (Title 54, Ch. 52) for any construction of $2,000 or more. No exam; $300,000 general-liability insurance required. |
| Roofer | Registration | No trade license. Roofing is construction, so a roofer must register with DOPL under the Contractor Registration Act (Ch. 52) for jobs of $2,000 or more. |
| Painter | Registration | No trade license. Commercial and residential painting that alters or improves a structure is construction, so a painting contractor must register with DOPL for jobs of $2,000 or more. |
| Carpenter | Registration | No trade license. Framing, remodeling and finish carpentry are construction, so a carpentry contractor must register with DOPL for jobs of $2,000 or more. |
| Landscaper | It depends | Landscape construction - grading, excavating, hardscaping, retaining walls - is construction and requires DOPL registration for jobs of $2,000 or more. Pure lawn care and maintenance is not construction and needs no registration. |
| Handyman | It depends | Construction work of $2,000 or more (aggregate labor and materials) requires DOPL registration; smaller casual jobs are exempt. A handyman may never perform plumbing, electrical or HVAC work reserved for a licensed trade. |
| Cleaner | No | No state license and no contractor registration. Cleaning is not construction, so it falls entirely outside the Contractor Registration Act and the DOPL trade boards. |
"Yes" means a DOPL-issued state license (with exam) is required; "Registration" means no license/exam but mandatory DOPL contractor registration for construction of $2,000 or more; "It depends" turns on whether the work is construction. Cities and counties may also require a local business license.
License vs. registration: Idaho's two-track system
Idaho does not license most contractors the way many states do. Instead it runs two separate tracks, both administered by the Division of Occupational & Professional Licenses (DOPL). The first track is a true occupational license - required only for plumbing, electrical and HVAC work - which demands documented experience, classroom hours and a passing score on a competency exam. The second track is a registration under the Idaho Contractor Registration Act (Title 54, Chapter 52), which every other construction contractor must complete.
The critical difference: registration is not a competency credential. There is no exam and no proof of skill or experience - the state simply records who is doing construction business and confirms they carry insurance. A registered general contractor has been vetted for insurance, not for competence, which is why hiring a licensed plumber or electrician for reserved work still matters.
The state-licensed trades: plumbing, electrical, HVAC
Three trades require a genuine DOPL license before you may perform the work for pay. Historically these boards sat under the Idaho Division of Building Safety; they were consolidated into DOPL in 2020, but the underlying statutes are unchanged.
Plumbing (Title 54, Ch. 26) is governed by the Idaho State Plumbing Board. A journeyman must accumulate about 8,000 hours of experience and 576 classroom hours and pass an exam; a plumbing contractor must hold a journeyman license, pass a contractor exam and post a $2,000 compliance bond. Electrical (Ch. 10) runs through the Idaho Electrical Board, with apprentice, journeyman, master and electrical-contractor credentials - a journeyman needs roughly 4 years / 8,000 hours of supervised work plus an exam. HVAC (Ch. 50) runs through the Idaho HVAC Board, which issues certificates of competency; a journeyman needs about 4 years / 8,000 hours plus 576 classroom hours. In each of these trades, working without the required license exposes you to civil penalties.
The Idaho Contractor Registration Act
Every contractor who performs construction in Idaho - and who is not otherwise a licensed plumber, electrician or HVAC contractor - must register with DOPL under the Idaho Contractor Registration Act, effective January 1, 2006. "Construction" is defined broadly in Idaho Code 54-5203 as building, altering, repairing, adding to, improving, moving, excavating or demolishing any building or structure. That sweeps in general contractors, roofers, painters, carpenters, drywall and concrete crews, and landscape-construction firms.
Registration requires no exam and no proof of experience. The core obligations are to file an application, pay the fee, and carry a certificate of general-liability insurance of at least $300,000 (single limit, covering construction operations) per Idaho Code 54-5210. A contractor who is required to register but fails to do so waives the right to file a mechanic's lien and cannot use the courts to collect on the contract - a powerful practical penalty.
Who is exempt from registration
Idaho Code 54-5205 lists the exemptions from contractor registration. The most important for tradespeople:
Small jobs - work whose aggregate price for labor and materials is less than $2,000 does not require registration, provided the work is not part of a larger divided project. Already-licensed trades - persons licensed under the plumbing, electrical, HVAC and other listed chapters of Title 54 are exempt, because their trade license already covers them. Owners working on their own property (with limits if they build to sell within 12 months), employees of a registered contractor, public utilities, government bodies, farmers and ranchers on their own land, and logging contractors are also exempt.
These exemptions never let an unregistered person cross into a licensed trade: a handyman, painter or carpenter still cannot legally perform plumbing, electrical or HVAC work reserved for a licensed contractor.
Local rules and cleaning services
Idaho has no statewide general-business license, but many cities and counties require a local business license or permit, and building permits are required for most construction regardless of who does the work. Always confirm local requirements with your city or county building department before starting a job.
Cleaning services - residential or commercial - sit entirely outside this framework. Cleaning is not "construction," so a cleaner needs no DOPL trade license and no contractor registration at the state level, though a local business license may still apply. The same is true of pure lawn maintenance that involves no landscape construction.
How to get licensed in Idaho
- Decide whether your work is a licensed trade (plumbing, electrical or HVAC) or general construction - only the three technical trades require a DOPL competency license; everything else that is construction requires registration instead.
- For a trade license, build the required supervised experience (roughly 8,000 hours / 4 years) and classroom hours as a registered apprentice, then apply to sit for the DOPL journeyman or contractor exam for your trade.
- For contractor registration, obtain a general-liability insurance certificate of at least $300,000 single limit covering your construction operations, as required by Idaho Code 54-5210.
- Submit your application to DOPL - a trade-license application (with exam results and any compliance bond) or a contractor-registration application (with your insurance certificate) - and pay the applicable fee at dopl.idaho.gov.
- Keep the credential active by renewing on DOPL's schedule (registrations renew annually or biennially; trade licenses on their board's cycle) and check whether your city or county also requires a local business license.
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Frequently asked questions
Do I need a contractor license in Idaho?
It depends on the trade. Only plumbers, electricians and HVAC installers need a true state license (with an exam) from DOPL. General contractors, roofers, painters, carpenters and most other construction contractors do not take a competency exam - instead they must register with DOPL under the Idaho Contractor Registration Act if the job is $2,000 or more. Registration requires $300,000 general-liability insurance but no test.
What is the difference between contractor registration and a license in Idaho?
A license (plumbing, electrical, HVAC) proves competency - it requires documented experience, classroom hours and a passing exam. A registration under the Idaho Contractor Registration Act (Title 54, Ch. 52) only records that a construction contractor exists and carries insurance; there is no exam and no experience requirement. Registration is mandatory for construction of $2,000 or more, and skipping it forfeits your right to file a mechanic's lien.
Does a handyman or painter need to register in Idaho?
Yes, in most cases. Painting and general handyman/repair work are "construction" under Idaho Code 54-5203, so if the aggregate price for labor and materials is $2,000 or more, the contractor must register with DOPL. Casual jobs under $2,000 are exempt under Idaho Code 54-5205. Neither a handyman nor a painter may ever perform plumbing, electrical or HVAC work reserved for a licensed trade.
Does a cleaning business need a license in Idaho?
No. Cleaning is not construction, so a residential or commercial cleaning business needs no DOPL trade license and no contractor registration at the state level. A city or county business license may still be required, so check with your local government before operating.
Sources: Idaho DOPL - Division of Occupational & Professional Licenses, Idaho Code 54-5203 - Definitions (Contractor Registration Act), Idaho Code 54-5204 - Registration Required, Idaho Code 54-5205 - Exemptions, Idaho Code 54-5210 - Application for Registration (insurance), Idaho DOPL - State Plumbing Board FAQs, 2025. Licensing rules change — always confirm current requirements with the relevant state board and your local city before you work.