Updated: Apr 23, 2026
Location and Projects
Address
40 BLACKSTONE DR, San Rafael, CA, 94903
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Marinwood Construction
Marinwood Construction, 40 Blackstone Dr, San Rafael, CA (Owned by: William Roy Cox) holds a General Building license according to the California license board.
Their BuildZoom score of 93 ranks in the top 27% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Marinwood Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Marinwood Construction Services
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Marinwood Construction Contact Information
Phone Number: (415) 637-8557
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Address: 40 BLACKSTONE DR, San Rafael, CA 94903
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Marinwood Construction San Rafael
Quality
93
73rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Marinwood Construction has a BuildZoom score of 93, which places them above 73% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
Our building permit records indicate that Marinwood Construction has worked on at least
1.0 project over the past year.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Building Permits by Marinwood Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace deck & addition concrete structural beams
Valuation:
$50,000
Permit #:
179760
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Large rmdl; exp deck
Valuation:
$310,000
Permit #:
168743
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Siding replacement non-structural door/window replacement;
2020-12-01
Replace 11 existing windows and 2 existing patio doors replace rotted siding on home
Valuation:
$100,000
Permit #:
B24050
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
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Marinwood Construction Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Marinwood Construction License info
Verified License
| License # | 990193 |
| 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 Marinwood Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
Bonded
| Bonded Agent | Suretec Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Clear Spring Property & Casualty Company |
Marinwood Construction Employees
WC
William Roy Cox
Owner