JB Mechanical Inc DBA Mas Service
Verified against CSLB on · View on CSLB
License details
- License number
- 498289
- License term on file
- September 15, 1986 – June 30, 2028
Business
- (888) 314 0451 (CSLB public record)
- 5083 LONE TREE WAY, Antioch, CA 94531Contra Costa County
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What to check next
Frequently asked questions
Is JB Mechanical Inc DBA Mas Service licensed in California?
Yes. JB Mechanical Inc DBA Mas Service holds an active California state contractor license (CSLB #498289), verified against the CSLB public record on August 4, 2026.
What is JB Mechanical Inc DBA Mas Service's CSLB license number?
JB Mechanical Inc DBA Mas Service's California contractor license number is 498289. Look that number up with the CSLB "Check a License" tool to confirm its current status against the public record yourself.
What kind of work is JB Mechanical Inc DBA Mas Service licensed for?
JB Mechanical Inc DBA Mas Service is classified under Warm-Air Heating, Ventilating and Air-Conditioning (C-20) and Refrigeration (C-38) by the CSLB.
How do I verify JB Mechanical Inc DBA Mas Service's license myself?
Look up license #498289 with the CSLB "Check a License" tool and compare the status, bond, and workers' compensation details against what's shown on this page. This page reflects the CSLB public record as of August 4, 2026.
Verify it yourself: How to verify a California contractor license · Look up #498289 on CSLB
See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.