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Iowa: under $2,000 a year before you need a contractor registration
In Iowa you need no state contractor registration while your work comes to under $2,000 a year, all jobs together. Plumbing, electrical and HVAC: state license. Read from Iowa's own pages, checked November 6, 2026.
The limit in Iowa
The limit: Under $2,000 a year, all jobs together. You can earn under $2,000 a year without registering: a 12-month total of all your jobs together, not a per-job limit. In short: under $2,000 a year in construction earnings (annual total, not per job); no registration needed.
What counts: "a person who earns less than two thousand dollars annually or who performs work or has work performed on the person's own property is not a contractor for purposes of this chapter" The state's words do not say whether materials count toward the limit.
Conditions: counted per year, not per job; electrical, plumbing and HVAC work still need state licenses regardless of amount.
Iowa has contractor REGISTRATION (no exam) for anyone in the business of construction earning $2,000+ a year.
Licenses in Iowa
General contractors: State registration. All construction contractors must register with DIAL if they earn at least $2,000 a year from construction (annual earnings test, not a job value). No general contractor license exam.
Plumbing: State license. State license from the Plumbing and Mechanical Systems Board required (Iowa Code § 105.10).
Electrical: State license. State license from the Electrical Examining Board required to provide electrical services / wire for others (Iowa Code §§ 103.8, 103.11); owner of an existing single-family principal residence exempt.
HVAC: State license. HVAC-refrigeration (and mechanical, sheet metal, hydronic) licensed under the same Plumbing and Mechanical Systems Board (Iowa Code §§ 105.10, 105.18).
Your license number in Iowa
Your license number: Plumbing, HVAC and other mechanical contractors must show the number on written advertising. None of these rules names invoices.
In the rule's words: “All written advertisements distributed in this state by a person who is engaged in the business of designing, installing, or repairing plumbing, HVAC, refrigeration, sheet metal, or hydronic systems shall include the listing of the contractor license number, as applicable.” (Iowa Code § 105.25 (plumbing/mechanical contractors only))
Iowa's board, and when this was checked
The board: Iowa Department of Inspections, Appeals, and Licensing (DIAL) — contractor registration. As of November 6, 2026.
This is a summary of each state's own pages as of November 6, 2026, not legal advice. Rules change, and cities and counties add licenses of their own. Check with your state's board, linked on this page, before you rely on it.
Compare Iowa with every state's limit.
Official sources for Iowa
7 of Iowa's own pages, each quoted with its link:
- Iowa Code chapter 91C Construction Contractors (Iowa Code § 91C.1(1)(a)): “However, a person who earns less than two thousand dollars annually or who performs work or has work performed on the person's own property is not a contractor for purposes of this chapter.”
- Iowa Code 91C.2 (Iowa Code § 91C.2): “A contractor doing business in this state shall register with the director”
- DIAL Contractor Registration: “All individual and business construction contractors ... performing 'construction' work to be registered with the Department of Inspections, Appeals, and Licensing (DIAL) if they earn at least $2,000 a year from construction.”
- Iowa Code 105.10 (Iowa Code § 105.10(1)): “a person shall not operate as a contractor or install or repair plumbing, mechanical, HVAC, refrigeration, sheet metal, or hydronic systems without obtaining a license issued by the board”
- Iowa Code 105.25 Advertising — violations — penalties (Iowa Code § 105.25): “All written advertisements distributed in this state by a person who is engaged in the business of designing, installing, or repairing plumbing, HVAC, refrigeration, sheet metal, or hydronic systems shall include the listing of the contractor license number, as applicable.”
- Iowa Code 103.8 / 103.11 (Iowa Code § 103.8): “No person, except a person licensed as an electrical contractor, shall engage in the business of providing new electrical installations or any other electrical services regulated under this chapter.”
- DIAL Electrical Licensing FAQs: “A new house will require the electrical work to be performed by a licensed Electrical Contractor or Residential Electrical Contractor.”
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