STATE LICENSE
RequiredConnecticut Department of Energy and Envi…
Under the Connecticut Pesticide Control Act, anyone applying pesticides on property not owned or rented by them or their employer is a commercial applicator and must be certified by DEEP (CGS §§ 22a-47, 22a-54). Supervisors, who decide what to apply and how, pass written and usually oral exams ($200 exam fee) and pay $285 for a five-year certificate; technicians hold $80 operator certificates and need written instructions for every application.
Every exterminator business must hold a DEEP Certificate of Registration running September 1 to August 31 ($240, waived when the business employs only one certified applicator) and employ a certified supervisor in each category it works in at each place of business (§§ 22a-66c, 22a-66f). Supervisors renew every five years with 12 continuing-education credits per category.
The state sets the license floor; the county or city permit office controls filing, inspections, and local rules wherever the job site sits.
DEEP holds exclusive authority over pesticide spraying practices (CGS § 22a-54(a)), so Bridgeport, Hartford, and New Haven do not license applicators. State law separately restricts lawn-care pesticide use at schools and day-care centers (§ 22a-66m).
The local offices section below names the exact permit desk for every Connecticut county on file.
Each row names the issuing authority, cost, timeline, citation, and status behind the requirement — verified against the official source.
Published fees from the issuing authorities, as of October 2026. Local permit fees vary by project and jurisdiction — the basis is stated where a flat number does not exist.
A business employing only one certified supervisory applicator must still register but pays no $240 fee.
DEEP's category sheet places tick control under 3A Ornamental & Turf.
A lapsed certificate can be renewed within one year with a late fee of 10% plus 1.25% per month; after a year you must re-test (§ 22a-54(f)(3)).
A practical sequence for a new pest control contractor in Connecticut. Actual agency processing times are noted in the ledger above.
Each item names the issuing authority, cycle, and citation.
Statutory consequences with their citations — not estimates, not “commonly cited” guesses.
Performing, advertising, or soliciting commercial pesticide application without certification — or doing supervisory work with only an operator certificate — draws a daily civil penalty.
A commercial applicator or uncertified person who knowingly violates the Pesticide Control Act faces criminal penalties.
Operating a pesticide application business without a DEEP certificate of registration.
Inside city limits, the city office listed here issues the permit; the county office serves unincorporated areas. Every office links to its official page.
| County · City | Permit office | Portal |
|---|---|---|
| Fairfield County Bridgeport (consolidated gov.) | City of Bridgeport Building Department ↗ | Park City Portal ↗ |
| Hartford County Hartford (consolidated gov.) | City of Hartford Department of Development Services — Licenses and Inspections ↗ | Accela Citizen Access (Hartford) ↗ |
| New Haven County New Haven (consolidated gov.) | City of New Haven Office of Building Inspection & Enforcement ↗ | City Squared Electronic Permitting ↗ |
Every fact in this file was checked against these official sources on October 2026.
Pending verification: Any minimum experience requirement for supervisory certification set by DEEP regulation (DEEP's page lists only age 18 and passing exams) · Financial-responsibility (insurance) amounts DEEP may require of commercial applicators under § 22a-54(g) · Whether the Everblue proctoring fee is $21 or $29 (DEEP pages conflict) · Continuing-education credits required for operator certificate renewal
General information, not legal advice. Always confirm requirements, deadlines, and forms with the issuing authority before filing or contracting.
Store licenses, permits, policies, and renewal dates in one place.