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Connecticut construction certification requirements

The safety training Connecticut asks of construction crews, rule by rule: what each card is, who needs it, how long it lasts, and the official source to check it against.

Last reviewed September 22, 2026

This is a summary to help you plan, not legal advice. Check the linked source before you rely on it.

OSHA 10 on state and municipal public works projects

Anyone doing the work of a mechanic, laborer or worker must have completed an OSHA approved construction safety and health course of at least 10 hours. Licensed plumbers and electricians whose OSHA 10 is five or more years old also need a 4 hour refresher.

The cards it asks for

  • OSHA 10-Hour Construction

    Who needs it
    Every mechanic, laborer and worker on a covered public works project.
    Issued by
    OSHA
    How long it lasts
    No expiry set by this rule. See the renewal note.
  • OSHA 4-Hour Construction Refresher

    Who needs it
    Licensed plumbers and electricians whose OSHA 10 is five or more years old.
    Issued by
    OSHA authorized trainer
    How long it lasts
    No expiry set by this rule. See the renewal note.
Who it covers
State and municipal public works contracts entered into on or after July 1, 2009. It does not apply to new construction under $1,000,000 in combined total cost, or to remodeling, alteration or repair work under $100,000.
Deadline
Proof goes with the certified payroll for the first week each employee works on the project. Someone found without it is removed from the site if they do not produce it by the 15th day.
Renewal
The card does not expire under the statute, but the Labor Commissioner accepts a card dated no earlier than five years before the project starts. In practice, a card older than five years at the start of a project may not be accepted.
Read closely
The five year rule is measured from the start date of each project, not from a fixed expiry, so the board cannot show it as a date. Check each card against the project's start.

Keep Connecticut's cards current across your crew.

Currity keeps every card date for your crew and warns you at 90, 60 and 30 days, so a lapsed card turns up on the board before it turns up on site.