Contractor License from Illinois to Connecticut: Does It Transfer? (2026)
Last verified: 2026-07-21 · source: Connecticut Department of Consumer Protection - Occupational and Professional Trade Licensing ↗
A contractor license transfers from Illinois to Connecticut by endorsement — there is no automatic reciprocity, but you do not start over. Apply to the Connecticut Department of Consumer Protection - Occupational and Professional Trade Licensing, verify your Illinois license, and meet Connecticut's endorsement requirements. CGS 20-333a lets the DCP Commissioner grant a trade license (electrical, plumbing, heating/piping/cooling, sheet metal, etc.) WITHOUT examination to a currently-practicing licensee who holds a substantially-similar-or-higher license from another state, but ONLY where that state grants Connecticut licensees the same exam-free treatment (mutuality).
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Verdict
Licensure by endorsement
Connecticut does not have a trade agreement covering Illinois for the selected trade, so this move runs on Connecticut's case-by-case endorsement process. If you do commercial general-building work, check whether Connecticut accepts the NASCLA exam — passing it once can replace the trade exam here and in about fourteen other states. Electricians should check Connecticut's NERA status.
What changes, Illinois → Connecticut
| Illinois (current) | Connecticut (destination) | |
|---|---|---|
| Application fee | No reciprocity/endorsement fee exists because there is no reciprocity path; standard plumber licensing fees apply and were not captured. | License fees are set per class under CGS 20-335; no single published transfer/endorsement figure |
| Processing time | Not applicable — no reciprocity path. | Not stated by DCP |
| Licensing authority | Illinois Department of Public Health — Plumbing Program (general contractors are licensed municipally) | Connecticut Department of Consumer Protection - Occupational and Professional Trade Licensing |
The destination column is what you must satisfy — Connecticut sets the rules for this move.
Step by step
- Confirm Connecticut's current requirements on the Connecticut Department of Consumer Protection - Occupational and Professional Trade Licensing website (linked below) — rules change.
- Submit the endorsement application to the Connecticut Department of Consumer Protection - Occupational and Professional Trade Licensing.
- Arrange license verification from your current state.
- Hold a current, good-standing equivalent trade license from a state whose standards are substantially similar to or higher than Connecticut's.
- Reciprocity is discretionary and conditioned on the other state reciprocating for Connecticut licensees (mutuality).
- Pay the applicable license fee set under CGS 20-335.
- Pay the fees (License fees are set per class under CGS 20-335; no single published transfer/endorsement figure) and allow Not stated by DCP.
Official links
Related guides
Frequently asked questions
Does Connecticut accept a Illinois contractor license?
A contractor license transfers from Illinois to Connecticut by endorsement — there is no automatic reciprocity, but you do not start over. Apply to the Connecticut Department of Consumer Protection - Occupational and Professional Trade Licensing, verify your Illinois license, and meet Connecticut's endorsement requirements. CGS 20-333a lets the DCP Commissioner grant a trade license (electrical, plumbing, heating/piping/cooling, sheet metal, etc.) WITHOUT examination to a currently-practicing licensee who holds a substantially-similar-or-higher license from another state, but ONLY where that state grants Connecticut licensees the same exam-free treatment (mutuality).
What still applies even if reciprocity covers my trade?
Connecticut's business and law exam, financial statement, bond, and registration — reciprocity waives the trade exam only, not these.
What does the Illinois-to-Connecticut move cost and how long does it take?
License fees are set per class under CGS 20-335; no single published transfer/endorsement figure; processing Not stated by DCP.
Would the NASCLA exam help for this move?
If you do commercial general-building work, possibly — about 15 states accept the NASCLA Accredited Commercial General Building exam toward licensure. Check whether Connecticut is one on the Connecticut Department of Consumer Protection - Occupational and Professional Trade Licensing site.
Sources
Primary sources only — official boards and compact commissions. Data last verified 2026-07-21.
- Connecticut General Statutes Chapter 393, Sec. 20-333a (Reciprocity) and Sec. 20-334a (Types of licenses) ↗ (accessed 2026-07-21)
- Illinois Department of Public Health — Plumbing (licensing, forms; reciprocity form is Chicago-only) ↗ (accessed 2026-07-21)
- Illinois IDFPR — Roofing Contractors (no reciprocity provision) ↗ (accessed 2026-07-21)
Reviewed by Billy Reiner, Editor · verified against primary sources 2026-07-21
How we verify · All sources · spot an error? [email protected]