John Sherman Winkler

What this record tells you

John Sherman Winkler holds Florida licence CGC1511306, a CGC classification which authorises work as a certified/registered general contractor. A "C" prefix means the licence is certified — valid anywhere in Florida.

This licence was first issued in 2006, which makes it a long-held licence for the trade in this area. Roughly 36% of the 1,400 active general contracting licences based in the Jacksonville area were issued earlier than this one, and the local median sits at 2008. That is 20 years of continuous licensure.

John Sherman Winkler is one of 735 active general contracting licences registered to an address in Jacksonville, so you have local alternatives to compare quotes against.

The licence is recorded as expiring on 08/31/2026. Florida licences renew on a fixed cycle, and a licence that is not renewed moves to delinquent status — which is why the expiry date matters if you are planning work close to that date. Confirm the current status on the state portal before signing a contract.

Before you hire John Sherman Winkler

• Re-check licence CGC1511306 on the DBPR portal — status can change any day.
• Ask for a current certificate of liability insurance and workers' compensation, issued to you directly by their insurer.
• Confirm the name on your contract matches John Sherman Winkler or its qualifying agent, John Sherman Winkler.
• Compare at least three written quotes from other general contracting contractors in Jacksonville.
• Confirm in writing that the contractor — not you — pulls the building permit.