Doubleday Engineering, LLC

What this record tells you

Doubleday Engineering, LLC holds Florida licence CMC1251860, a CMC classification which authorises work as a certified/registered air conditioning or mechanical contractor. A "C" prefix means the licence is certified — valid anywhere in Florida.

This licence was first issued in 2026, which makes it one of the newer licences for the trade in this area. Roughly 91% of the 1,534 active hvac & ac repair licences based in the Miami area were issued earlier than this one, and the local median sits at 2019. That is 0 years of continuous licensure.

Doubleday Engineering, LLC is one of 18 active hvac & ac repair licences registered to an address in Coral Gables, so you have local alternatives to compare quotes against. Rodobaldo Duartes additionally holds 3 other active Florida licences in our records, which can indicate a contractor qualified across more than one trade or entity.

The licence is recorded as expiring on 08/31/2028. 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 Doubleday Engineering, LLC

• Re-check licence CMC1251860 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 Doubleday Engineering, LLC or its qualifying agent, Rodobaldo Duartes.
• Compare at least three written quotes from other hvac & ac repair contractors in Miami.
• Confirm in writing that the contractor — not you — pulls the building permit.