Updated: May 16, 2026
Location and Projects
Address
550 FORMSCHLAG LANE, Penngrove, CA, 94951
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Sanborn Design Associates Architect
Sanborn Design Associates Inc, 550 Formschlag Ln, Penngrove, CA (Owned by: Sanborn Stephen W) holds a Architect license and 1 other license according to the California license board.
Their BuildZoom score of 94 ranks in the top 24% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Sanborn Design Associates Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Sanborn Design Associates Inc Services
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Sanborn Design Associates Inc Contact Information
Phone Number: (707) 992-0001
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Address: 550 FORMSCHLAG LANE, Penngrove, CA 94951
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Building Permits by Sanborn Design Associates Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
New foundation and congregate walls new plumbing new electrical seismic upgrades remodel kitchen and master bedroom 223 square foot addition to single family dwelling addition of powder room and new bathrooms partial garage conversion and garage renovation retaining walls. added to permit 1/30/08 temp power pole for project
Valuation:
$332,341
Permit #:
B06-5479
Status:
final
Fee:
$6,667
Permit Type:
N/A
Building Type:
N/A
Development of two (2) acre parcel into 30-unit apartment complex consisting of 12 studios eight (8) one-bedroom eight (8) two-bedroom and two (2) three-bedroom units with pool spa and laundry
Valuation:
$0
Permit #:
DR03-038
Status:
APPROVED
Fee:
$825
Permit Type:
N/A
Building Type:
N/A
Develop existing 2-acre parcel into a 30-unit apartment complex. common area with pool/spa and laundry facility and parking areas will consist of some uncovered covered and some garage units
Valuation:
$0
Permit #:
DR02-142
Status:
CLOSED
Fee:
$0
Permit Type:
N/A
Building Type:
N/A
Development of 2 acre parcel into 30 unit apartment complex consistent of 12 studios 8 one bedroom 8 two bedroom and 2 three bedroom units with pool spa and laundry
Valuation:
$0
Permit #:
PRAP03-010
Status:
CLOSED
Fee:
$0
Permit Type:
N/A
Building Type:
N/A
Emergency tree removal due to lean and lifting cracked and spongy soil conditions
Valuation:
$0
Permit #:
TR11-036
Status:
APPROVED
Fee:
$53
Permit Type:
N/A
Building Type:
N/A
Second unit zoning permit request for a zoning permit for a 840 sq ft detached second dwelling unit on 4.86 acres
Valuation:
$0
Permit #:
ZPE05-0344
Status:
DONE
Fee:
$493
Permit Type:
N/A
Building Type:
N/A
Building/project/master application/master application
1997-04-28
Add&remodel
Valuation:
$145,972
Permit #:
97000-00000-00981
Status:
N/A
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building/project/master application/master application
1998-02-19
Remodel
Valuation:
$95,000
Permit #:
98000-00000-00326
Status:
N/A
Fee:
$1,628
Permit Type:
N/A
Building Type:
N/A
30 unit apartment project at the corner of kawana springs rd and petaluma hill rd (townhouses)
Valuation:
$0
Permit #:
DR00-083
Status:
CLOSED
Fee:
$0
Permit Type:
N/A
Building Type:
N/A
Remodel convert and addition to residence
Valuation:
N/A
Permit #:
1990-3465-00
Status:
triage
Fee:
$920
Permit Type:
N/A
Building Type:
N/A
To rezone parcel to rr-pd and create a 12 lot subdivision of single-family homes
Valuation:
$0
Permit #:
PRAP01-044
Status:
CLOSED
Fee:
$0
Permit Type:
N/A
Building Type:
N/A
Subdivide 7.1 acres into 11 lots and 4 parcels
Valuation:
$0
Permit #:
ENG05-044
Status:
MAP RCRD
Fee:
$54,631
Permit Type:
N/A
Building Type:
N/A
Development of 11 lot subdivision
Valuation:
$0
Permit #:
UPRJ05-255
Status:
IN_PROC
Fee:
$945
Permit Type:
N/A
Building Type:
N/A
New detached 3 car garage and covered patio
Valuation:
$25,197
Permit #:
B06-5480
Status:
withdrawn
Fee:
$193
Permit Type:
N/A
Building Type:
N/A
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Sanborn Design Associates Inc Reviews
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Verified License
BuildZoom confirmed this contractor's license
Sanborn Design Associates Inc License info
Verified License
| License # | C25291 |
| Status | Active |
| State | California |
| Type | Architect |
| Business Type | Corporation |
- BuildZoom verified this license was active as of August 2025.
Verify this license's status for Sanborn Design Associates Inc at the California Architect License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 360057 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Sanborn Design Associates Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $12,500 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
8
Permits
- Building permit records show that Sanborn Design Associates Inc has worked on 8 permitted projects.
Sanborn Design Associates Inc Employees
DP
David Howard Pierson
Officer
GS
Gayle Mae Sanborn
Officer
SW
Sanborn Stephen W
Owner
SS
Stephen Warren Sanborn
Rmo/Ceo/Pres