Idaho roofing: permits, codes and approvals

Idaho contractor registration (no roofing license), the 2018 IRC-based Idaho Residential Code, city re-roof permits in Boise and Nampa, and the 90-day lien and residential disclosure rules.

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1 · Product approvals

Product approvals

Idaho has no state roofing product approval or listing system. Local building officials rely on the Idaho Residential Code's labeling rules and on evaluation reports (ICC-ES, UL and similar) and manufacturer instructions.

Code evaluation reports (ICC-ES, UL, IAPMO): 48 roofing reports

2 · Permit forms

City re-roof permits

There is no statewide re-roof permit rule. Cities and counties that issue building permits decide; Boise and Nampa both require a permit for a residential re-roof.

BoiseBoise lists 're-roof an existing structure' as work that needs a building permit; homeowners and contractors can apply online.NampaNampa uses one reroof permit application for all reroof projects; residential jobs must include the manufacturer's installation packet, and no more than two roof layers are allowed when done.MeridianThe city's "Do I need a permit?" guide lists roof replacement/repair under work that needs a permit.

3 · Code rules

Code rules

Idaho's statewide residential code is the 2018 IRC (Parts I-III and IX) with Idaho amendments, called the Idaho Residential Code (2020 Edition). Cities and counties that issue permits must adopt it. Official adoption page ↗

Local adoption is mandatory where permits are issuedAny city or county that issues building permits must adopt the Idaho Residential Code by ordinance, effective January 1 of the year after the state board adopts it.Local design criteria (snow and wind loads) can differLocal governments may amend the administrative parts and Section R301 design criteria to fit local conditions, so check the local snow load and wind speed before specifying a roof.State amendments can't be stricter than the IRCThe Idaho Building Code Board adopts the IRC edition and amendments by rule; its residential amendments may not be more restrictive than the ICC-published IRC.

4 · Wind, fire and storm programs

Wind, fire and storm programs

No state wind, hail or FORTIFIED roof program or roof-related insurance discount law was found. The Department of Insurance warns homeowners about storm-chaser roofing practices.

Department of Insurance roofing red flagsThe Idaho DOI tells homeowners to be wary of roofers who offer to waive the insurance deductible or won't show general liability and workers' comp certificates.

5 · License and insurance

License and insurance

Idaho does not license roofers. Contractors register with the Idaho Contractors Board (DOPL) under the Idaho Contractor Registration Act for any job over $2,000.

Contractor registration over $2,000Anyone doing a construction job costing more than $2,000 (labor and materials) must register with the Idaho Contractors Board, unless exempt. Registration renews every year.Required insuranceRegistration requires proof of workers' comp (or a reason it isn't required) and general liability with products and completed operations coverage of at least $300,000 single limit.Registration number on permits and adsThe registration number must appear on contracts, advertising and permit applications and be posted at the job site; unregistered contractors may be refused building permits.Penalty for working unregisteredContracting without a current registration is a misdemeanor and the contractor loses the right to file a mechanic's lien.

6 · Lien and contract forms

Lien and contract rules

Idaho has no preliminary notice, but residential jobs over $2,000 need a signed disclosure before the contract. Liens are filed within 90 days of finishing and must be enforced within six months.

Residential disclosure statement (Idaho Code 45-525)Before signing a homeowner contract over $2,000, the general contractor must give a signed disclosure of the owner's rights to lien waivers, insurance proof, title coverage and a surety bond. Skipping it is a consumer protection violation.Subcontractor and supplier listThe contractor must also give the homeowner a signed list of subs and suppliers who furnished over $500 before the homeowner's final payment.Claim of lien: 90 days (Idaho Code 45-507)File the lien with the county recorder within 90 days after completing the work, and serve a copy on the owner within 5 business days of filing. Residential liens must include proof of the 45-525 disclosure.Foreclose within six months (Idaho Code 45-510)A lien expires unless a court action is started within six months after the claim is filed.

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Public records, last checked Oct 23, 2026. Always verify on the official source before you permit.