Every week we talk to a plumber, roofer, or landscaper who just formed an LLC and thinks the paperwork is done. It isn't. An LLC organizes your business — it does not license you to do the work. In Illinois and Iowa, most trades need a state or local license, a contractor registration, permits, and insurance before they legally perform work or advertise it. Here's how proper licensing actually works, and why it matters before you spend a dollar on marketing.
An LLC Is Not a License
This is the single most common misunderstanding we see. Forming an LLC (or a corporation) creates a legal business entity — it affects your liability, your taxes, and how the business is structured. It says nothing about whether you're qualified or permitted to install a furnace, wire a panel, or re-roof a house. Those are separate credentials, issued by separate agencies, under separate rules.
Think of it as two different jobs. The LLC gets your business on paper with the Secretary of State. Licensing gets your trade approved with the agency or city that regulates it. You almost always need both.
How Illinois Handles Contractor Licensing
Illinois does not issue one statewide general contractor license that covers every trade. Instead, it licenses just two trades at the state level and leaves the rest to cities and counties.
What Illinois licenses directly
- Plumbing — licensed statewide by the Illinois Department of Public Health (IDPH) under the Illinois Plumbing License Law.
- Roofing — licensed statewide by the Illinois Department of Financial and Professional Regulation (IDFPR) under the Roofing Industry Licensing Act, in Limited and Unlimited classes.
Everything else is local
General contracting, electrical, and HVAC work have no statewide license in Illinois. They're regulated city by city — Chicago's Department of Buildings, for example, licenses general, electrical, and plumbing contractors in classes tied to project value, and most suburbs and downstate cities require their own contractor registration and proof of insurance. You'll also register the business with the Illinois Department of Revenue, and lawn-care or landscaping work that applies pesticides generally needs a separate applicator license.
How Iowa Handles Contractor Licensing
Iowa also has no single "general contractor license," but it casts a much wider registration net. Nearly anyone doing construction work has to register with the state.
Construction contractor registration
- Anyone earning $2,000 or more per year from construction work in Iowa must register as a Construction Contractor with the Iowa Department of Inspections, Appeals, and Licensing (DIAL) — a $50 annual fee.
- "Construction" is defined broadly under Iowa Code Chapter 91C: carpentry, roofing, painting, landscaping, and more all count.
- Out-of-state contractors face extra steps, including a $25,000 surety bond and registration with the Iowa Department of Revenue.
Separate trade licenses
Registration is not the same as a trade license. Plumbing, mechanical, HVAC, and refrigeration work is licensed by the Iowa Plumbing and Mechanical Systems Board — typically with liability insurance and a surety bond. Electrical work is licensed by the Iowa Electrical Examining Board. And cities like Des Moines, Cedar Rapids, and Davenport can add their own local licensing on top.
A Quick Trade-by-Trade Look
This is a starting point, not a final answer — requirements change and vary by city and county. Always confirm with the state agency, licensing board, or local building department before you bid or advertise.
| Trade | Illinois | Iowa |
|---|---|---|
| Plumbing | State license (IDPH) | State license (PMSB) |
| Electrical | Local — city/county | State license (Electrical Board) |
| HVAC / mechanical | Local — city/county | State license (PMSB) |
| Roofing | State license (IDFPR) | Contractor registration + local permits |
| General contracting | Local — city registration common | Contractor registration above $2,000/yr |
| Landscaping | Local permits; pesticide license if spraying | Registration; pesticide license if spraying |
| Pest control | State pesticide/pest control license | State pesticide applicator license |
| Lead-safe renovation | Federal EPA RRP certification | Federal EPA RRP certification |
| Concrete, masonry, decks, painting | Mostly local permits & registration | Registration + local permits |
Don't Forget Local Permits and Insurance
State rules are only half the picture. Cities and counties issue project permits for plumbing, electrical, roofing, HVAC, structural work, decks, fences, demolition, sewer work, and signage — and many require you to register locally and show insurance before you can pull a single permit. On the insurance side, most home-service businesses carry general liability, workers' compensation if they have employees, and commercial auto. Certain state licenses also require a surety bond as a condition of licensure.
Why This Matters Before You Market
Here's the part that connects to everything we do. Homeowners increasingly check license numbers before they hire, and platforms and review sites do too. If your website claims "licensed and insured," it needs to be true — for the specific license and coverage you actually hold, and only for services and areas you're qualified to perform. An inaccurate claim can cost you a job, or worse, your reputation.
The flip side is the good news: accurate licensing is a marketing asset. A real license number, an honest service area, and verifiable insurance are trust signals that convert. A professional website built on a solid compliance foundation outperforms one built on overpromises every time.
Toughjobs is not a law firm, CPA firm, insurance agency, or licensing authority. This article is educational only and reflects general information at the time of writing. Requirements vary by trade, city, county, and project, and they change. Verify current requirements directly with the appropriate state agency, city or county government, licensing board, attorney, accountant, or insurance professional before operating or advertising.
Want the full breakdown, trade by trade, with the agencies and sources laid out? We put together a complete guide: Home Service Business Licensing in Illinois & Iowa.