Independent coverage of Illinois housing, remodeling & residential developmentMonday, September 21, 2026
Illinois Remodeling & Development Network
Homeowner Tools · Verification Guide

Illinois Contractor License & Verification Hub

Illinois does not issue one universal statewide license for general remodeling contractors. Whether a business needs registration, a license, or a permit — and which agency actually oversees that — depends on the exact type of work and the exact jurisdiction. This guide points you to the correct official source for each trade, and how to compare what you find against the business you're hiring. It is not a contractor directory, search proxy, or endorsement of any company.

Last reviewed: September 21, 2026

Why there's no single "Illinois contractor license" lookup

Some trades — roofing, plumbing, architecture, and professional engineering among them — do carry a genuine statewide Illinois license you can search directly. Others, including general remodeling contracting and most electrical work, are governed locally: by the city, village, or county where the work happens, not by one state database. Checking the wrong system, or assuming a ZIP code tells you the right authority, can give a false sense of confidence. Always confirm which framework applies to your specific project and location before relying on any single lookup.

Verifying a license or registration also never guarantees the quality of the work, the adequacy of a contractor's insurance, code compliance, permit approval, or overall suitability for your project — it only confirms that a specific credential exists and is currently active.

Choose the work being done

Verify the right credential for the job

General remodeling contractor

Illinois has no single statewide license for general remodeling contractors. Whether registration, a local license, or a permit is required depends entirely on the city, village, or county where the work is happening.

  • Many Illinois municipalities and some counties require contractor registration or a local license before permits are issued — many others have no such requirement at all.
  • There is no universal statewide general-contractor lookup. The correct starting point is always the building/permit department for the property's exact jurisdiction.
  • A ZIP code or postal city cannot tell you the correct authority on its own — incorporated limits and unincorporated county areas are frequently governed differently.

Roofing contractor

Roofing is one of the few trades with a genuine statewide Illinois license, issued and searchable through IDFPR.

  • Look up the exact license using the contracting entity's legal business name, not just a brand or marketing name.
  • Confirm the license status is active and the expiration date has not passed before hiring.
  • Illinois roofing license numbers commonly begin with the prefix 104- — but the prefix alone does not prove a license is valid; always confirm active status in the lookup.

Plumber / plumbing contractor

Plumbing work in Illinois is regulated at the state level through the Illinois Department of Public Health, but the individual plumber's license and a plumbing contractor's business registration are distinct concepts.

  • An individual licensed plumber's license is verified separately from any business or contracting entity they work for.
  • Ask which licensed plumber will actually perform or supervise the work, and verify that individual's license directly.
  • A business operating as a "plumbing contractor" does not replace the requirement for licensed plumbers to perform the plumbing work itself.

Electrical contractor / electrician

Illinois does not license electricians or electrical contractors at the state level for most work. Registration and licensing authority generally sits with individual municipalities under the Illinois Municipal Code.

  • There is no single statewide electrician lookup for most Illinois properties — check with the local building or licensing department that has authority over the property.
  • Illinois municipal code gives home-rule and other municipalities the authority to require electrical contractor registration; requirements vary widely by city and village.
  • Chicago maintains its own official electrical contractor lookup — that is a single city's local example, not a statewide Illinois database.

Pre-1978 paint disturbance (renovation, repair, painting)

Ordinary renovation, repair, or painting work that disturbs paint in housing built before 1978 falls under the EPA's federal Renovation, Repair, and Painting (RRP) rule — a different framework from lead abatement.

  • Firms performing this work for compensation generally need EPA Lead-Safe Certified Firm status, verified through EPA's own lookup tool.
  • A firm's certification and the individual certified renovator assigned to a job are two distinct things — ask which certified renovator will be on site.
  • This RRP pathway is not the same as, and does not substitute for, licensed lead abatement — see the separate abatement entry below.

Lead abatement

Lead abatement — work intended to permanently eliminate lead-based paint hazards — is a separately licensed activity in Illinois, distinct from ordinary RRP renovation work.

  • Abatement work should be performed by a contractor holding current Illinois lead abatement licensure through IDPH, not simply an RRP-certified firm.
  • Confirm both the business's licensure and, where applicable, the credentials of the individuals performing the work.
  • Do not assume RRP lead-safe certification alone qualifies a firm to perform abatement — the two credentials serve different purposes.

Asbestos

Asbestos inspection, abatement, and related work in Illinois requires licensure of both the contracting business and the individual professionals performing specific roles.

  • Check the company against IDPH's licensed asbestos contractors dataset before hiring for any asbestos-related work.
  • Separately check the individual professional (inspector, abatement worker, supervisor, etc.) against IDPH's licensed professionals dataset for their specific discipline.
  • Never attempt DIY sampling, disturbance, or removal of suspect asbestos-containing material — appearance alone cannot confirm or rule out asbestos.

Architect, professional engineer, structural engineer, or design firm

Design professionals practicing in Illinois — architects and professional/structural engineers — are individually licensed through IDFPR, and many firms offering design services must separately register as a professional design firm.

  • Verify the individual professional's license (architect or professional engineer) directly through the IDFPR lookup.
  • If a business is offering design services as a firm, check whether it also needs — and holds — professional design firm registration.
  • Individual licensure and firm registration are separate checks; confirming one does not confirm the other.

How to verify before signing

  1. 01

    Identify the exact legal business name

    Get the full legal name of the business (not just a marketing or brand name) and, if available, the name of the individual who will perform or supervise the work.

  2. 02

    Ask for the license or registration number

    A legitimate, currently licensed contractor should be able to provide a license or registration number without hesitation.

  3. 03

    Search the correct regulator for the work type

    Use the matching section above — IDFPR, IDPH, EPA, the local building department, or the applicable municipality — rather than assuming one lookup covers every trade.

  4. 04

    Compare status, expiration, and entity details

    Confirm the license is currently active (not expired, suspended, or revoked) and that the name and address on the license match the business you're hiring.

  5. 05

    Verify both the firm and the individual, where required

    For plumbing, lead work, asbestos, and design services in particular, the business credential and the individual professional's credential are separate — check both when the work calls for it.

  6. 06

    Ask the local building department about registration and permits

    Confirm whether the jurisdiction requires contractor registration, which permits the project needs, and who is responsible for pulling them.

  7. 07

    Request current proof of insurance

    Ask for a current certificate of liability (and workers' compensation, if applicable) insurance directly from the contractor or their insurer.

  8. 08

    Get the scope, price, and terms in writing

    Illinois' Home Repair and Remodeling Act generally requires a written contract or work order for home repair and remodeling work over $1,000 — this guide provides general information only, not individualized legal advice, so confirm current requirements directly with the statute or the Illinois Attorney General's office.

Home repair and remodeling work over $1,000 generally requires a written contract or work order under the Illinois Home Repair and Remodeling Act. This is general information, not individualized legal advice — review the written-contract section, the consumer-rights pamphlet section, and the insurance section, or contact the Illinois Attorney General's Home Repair office for guidance specific to your situation. The Attorney General also publishes a contractor-selection guide (PDF).

Warning signs worth pausing on

  • Refuses to provide their exact legal business name or a license/registration number.
  • The license number they provide belongs to a different business or individual than the one you're hiring.
  • Pressures you to pay the full price upfront, before any work begins.
  • Suggests skipping permits or says permits "aren't necessary" for the project.
  • Will only describe the scope of work verbally, with nothing in writing.
  • Claims that a general contractor license or registration automatically covers separately licensed trades like plumbing, electrical, roofing, lead, or asbestos work.

This guide is for general education only. It is not legal advice, does not certify or guarantee the quality, insurance coverage, code compliance, permit approval, or suitability of any contractor, and does not replace confirming current requirements with the applicable state regulator or your local building/permit authority. Licensing rules, agencies, and lookup tools can change — always verify directly with the official source before relying on the results. This page collects and saves nothing you enter or read here.

Frequently asked questions

Official sources