License is active
Source: Contractors State License Board (CSLB)
Licensed
Current and in good standing
Bonded
$25,000 surety bond
Insured
Workers' comp coverage on file
Clean record
No complaints or disciplinary actions
Hiring this contractor?
Get alerts if their license status changes.
You're monitoring this license!
We'll email you if the license status, bond, or complaint history changes.
Something went wrong
Is this your business?
Claim your profile to manage your listing.
Claim request submitted!
We'll be in touch at the email you provided to verify your identity.
Something went wrong
MASSONE MECHANICAL INC
- License Number
- 615532
- State
- California
- Status
- active
- Business Type
- Corporation
- Address
- P O BOX 40 ALAMO, CA, 94507 Contra Costa County
- Phone
- (925) 945 8501
License Dates
Issued
03/19/1991
Expires
03/31/2027
Expires in 12 months
CSLB Last Updated
01/12/2026
License Classifications
Personnel & Officers
HOLLINGSHEAD MICHAEL EDWARD
Responsible Managing Officer/Chief Executive Officer/President
MASSONE-HOLLINGSHEAD LINDA LEE
Officer
Contractor Bond
Amount: $25,000
Company: AMERICAN CONTRACTORS INDEMNITY COMPANY
Bond #SC1034988
Effective: 01/01/2023
Workers' Compensation
Carrier: OAK RIVER INSURANCE COMPANY
Policy #MAWC751915
Effective: 01/11/2026
Expires: 01/11/2027
CSLB designation: Workers' Compensation Insurance
Complaints & Disciplinary History
This reflects CSLB's bulk license data. For detailed complaint history including pending investigations, check the official CSLB record.
Verify this record on the official state licensing board
View on Contractors State License Board (CSLB) →Learn how to verify contractor licenses in California
California licensing guide →Data sourced from official state licensing board records. Always confirm critical information directly with the state board.
Verify Another Contractor
Homeowner Resources
Other Licensed C20| C38 in ALAMO
R L ZIEGENBEIN CONSTRUCTION INC
License #322200 · CA
LIVE OAK CONSTRUCTION INC
License #346437 · CA
FERREIRA ROBERT JOHN
ROBERT JOHN FERREIRA
License #347245 · CA
CROWELL DEVELOPMENT INC
License #351565 · CA
YOUNG D W CONSTRUCTION COMPANY INC
D W YOUNG CONSTRUCTION COMPANY INC
License #365358 · CA