Updated: Jan 21, 2026
Location and Projects
Address
303 BUTTERCUP CT, Sonoma, CA, 95476
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Duffy Construction
Based in Sonoma, CA, Duffy Construction brings nearly three decades of experience to residential construction and remodeling projects in the region. The company serves homeowners throughout Sonoma and the surrounding areas, supporting a range of project types from ground-up home building to additions and renovations. Duffy Construction is known for working closely with clients at all stages, from initial design consultations to the completion of construction. The contractor’s residential portfolio features new home builds as well as major remodels that update existing properties with modern layouts and materials. With 28 years in business, Duffy Construction draws on a long-established knowledge of local building regulations and the distinct architectural styles found across Sonoma County. The team focuses on delivering tailored construction solutions to meet the specific needs of Sonoma residents.
Duffy Construction Services
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Duffy Construction Contact Information
Phone Number: (415) 385-7269
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Address: 303 BUTTERCUP CT, Sonoma, CA 95476
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Light sheetrock cabinets and one non-load bearing wall
Valuation:
N/A
Permit #:
B2022-0328
Status:
final
Fee:
N/A
Permit Type:
Residential
Building Type:
N/A
Bathroom remodel unit 1 ground floor. rewire replumbing retile replace fixtures and fittings relocate tub new door to hallway
Valuation:
$31,300
Permit #:
201301168122
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Repairs to damaged stucco in kind approx. 100 sqft. replace damaged wood using 1/2 cdx p.t. plywood in 10d nails at 6 o.c edges 12 o.c field. provide 2x blocking at panel edges if necessary
Valuation:
$15,000
Permit #:
200901291046
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Remodel upgrades to existing utility room below existing garage space create additional storage. new retaining wall. additional entryway (interior doorway)
Valuation:
$25,000
Permit #:
200910219481
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Whole house remodel all electric required
Valuation:
N/A
Permit #:
B2022-0343
Status:
final
Fee:
$11,895
Permit Type:
Major remodel-50%...
Building Type:
N/A
Revision to pa# 2010-0428-1215-reconfigure bathroom bedroom media room layout at attic & laundry
Valuation:
$1
Permit #:
201104043392
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Residential remodel & deck
Valuation:
N/A
Permit #:
B0404-092
Status:
final
Fee:
$4,262
Permit Type:
Alter-res
Building Type:
N/A
3 bathrooms to be remodel
Valuation:
N/A
Permit #:
B1010-045
Status:
final
Fee:
$1,482
Permit Type:
Alter-sfd
Building Type:
N/A
3 bathrooms to be remodel
Valuation:
N/A
Permit #:
E1010-039
Status:
final
Fee:
$102
Permit Type:
Alter-sfd
Building Type:
N/A
3 bathrooms to be remodel
Valuation:
N/A
Permit #:
P1010-019
Status:
final
Fee:
$269
Permit Type:
Alter-sfd
Building Type:
N/A
Renew permit - remodel of existing residence
Valuation:
N/A
Permit #:
B0603-025
Status:
final
Fee:
$160
Permit Type:
Alter-res
Building Type:
N/A
Installation of 1 shower pan
Valuation:
N/A
Permit #:
PP20120206233
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remodel of existing residence
Valuation:
N/A
Permit #:
E0208-030
Status:
final
Fee:
$52
Permit Type:
Alter-res
Building Type:
N/A
Remodel of existing residence
Valuation:
N/A
Permit #:
P0208-025
Status:
final
Fee:
$52
Permit Type:
Alter-res
Building Type:
N/A
Residential remodel & deck
Valuation:
N/A
Permit #:
E0406-026
Status:
final
Fee:
$52
Permit Type:
Alter-res
Building Type:
N/A
Residential remodel & deck
Valuation:
N/A
Permit #:
M0406-023
Status:
final
Fee:
$52
Permit Type:
Alter-res
Building Type:
N/A
Residential remodel & deck
Valuation:
N/A
Permit #:
P0406-019
Status:
final
Fee:
$52
Permit Type:
Alter-res
Building Type:
N/A
2 1/2 bathroom remodel
Valuation:
N/A
Permit #:
370117
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remodel of existing residence
Valuation:
N/A
Permit #:
B0207-004
Status:
expired
Fee:
$965
Permit Type:
Alter-res
Building Type:
N/A
Enlarge kit/bath
Valuation:
N/A
Permit #:
B0005-070
Status:
expired
Fee:
$581
Permit Type:
Alter-res
Building Type:
N/A
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Duffy Construction License info
Verified License
| License # | 717952 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Duffy Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $25,000 |
9
Permits
- Building permit records show that Duffy Construction has worked on 9 permitted projects.
Duffy Construction Employees
PD
Patrick Joseph Duffy
Sole Owner