Updated: Apr 18, 2026
Location and Projects
Address
22040 BONNESS RD, Sonoma, CA, 95476
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Hartmann Construction
Hartmann Construction, 22040 Bonness Rd, Sonoma, CA (Owned by: Eric Joseph Hartmann) holds a General Building license according to the California license board.
Their BuildZoom score of 92 ranks in the top 32% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Hartmann Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Hartmann Construction Services
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Hartmann Construction Contact Information
Phone Number: (415) 497-7587
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Address: 22040 BONNESS RD, Sonoma, CA 95476
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Building Permits by Hartmann Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
1972-2 st-2 b/r-1440sf sfr-240sf loft-480sf deck
Valuation:
N/A
Permit #:
B1401454
Status:
final
Fee:
$179
Permit Type:
Alterations
Building Type:
N/A
Area 11 addition of 864 sq ft 24x36 garage to existing 576 sq ft 24x26, renovate the exiting north wall of garage
Valuation:
$21,000
Permit #:
CBN2002-02812
Status:
Finaled
Fee:
$484
Permit Type:
N/A
Building Type:
N/A
Reroof
Valuation:
$3,600
Permit #:
B0202927
Status:
final
Fee:
$59
Permit Type:
Alterations
Building Type:
N/A
Plan check -12/14/06 rev - installation permit
Valuation:
N/A
Permit #:
B0601385
Status:
final
Fee:
$602
Permit Type:
Standard
Building Type:
N/A
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Hartmann Construction Reviews
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Verified License
BuildZoom confirmed this contractor's license
Hartmann Construction License info
Verified License
| License # | 660192 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Hartmann Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
Bonded
| Bonded Agent | Hudson Insurance Company |
| Bond Value | $15,000 |
Hartmann Construction Employees
EH
Eric Joseph Hartmann
Owner