Illy HVAC at 3803-C William Drive, Saint Charles, MO 63304, held a HVAC/Mechanical Contractor license (#) with the St. Charles County contractors license board. We last verified the license was expired on 06-05-2026.

Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 23,328 Missouri contractors.

If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our bidding system to be easily matched to qualified, licensed professionals in your area.