Updated: May 28, 2026
Location and Projects
Address
18812 POLLEY LANE, Sonoma, CA, 95476
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William Patrick Builders Construction
William Patrick Builders, 18812 Polley Ln, Sonoma, CA (Employee: William Patrick Lopes) holds a General Building license according to the California license board.
Their BuildZoom score of 96 ranks in the top 20% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring William Patrick Builders, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
William Patrick Builders Services
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William Patrick Builders Contact Information
Phone Number: (510) 812-5515
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Address: 18812 POLLEY LANE, Sonoma, CA 95476
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Building Permits by William Patrick Builders
This is a sample of this contractor's permits. Click here to access their complete permit history.
Building/residential/mir/miscellaneous residential
2022-04-29
Addition a new 473 sf gazebo in backyard. gazebo is open on three sides with a shed roof roof to be standing seam metal wall to be stucco. addition electrical and gas
Valuation:
$18,000
Permit #:
BIMIR22-004624
Status:
final
Fee:
$1,429
Permit Type:
N/A
Building Type:
N/A
Addition a new 473 sf gazebo in backyard. gazebo is open on three sides with a shed roof roof to be standing seam metal wall to be stucco. addition electrical and gas
Valuation:
$18,000
Permit #:
BISUB22-01229
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel addition bathroom within existing space and remove & rebuild & enlarge attached patio cover. per plans 4/5/2018 revision - run bathroom drain pipe by cutting into garage floor. lma
Valuation:
N/A
Permit #:
BIAL18-000414
Status:
final
Fee:
$4,638
Permit Type:
N/A
Building Type:
N/A
Res-bathroom remodel reconfigure fixtures plumbing electrical alter doorway(s)
Valuation:
N/A
Permit #:
BLD22-7171
Status:
final
Fee:
$2,645
Permit Type:
N/A
Building Type:
N/A
2nd story addition 781 sq. ft. and renovations to rear of existing residence
Valuation:
$280,358
Permit #:
B2018-00766
Status:
final
Fee:
$14,325
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel. replace windows
Valuation:
N/A
Permit #:
BLD20-7695
Status:
plancheck
Fee:
$3,349
Permit Type:
N/A
Building Type:
N/A
New 1, 100 sq ft addition @ the rear of the house to include new master suite guest bedroom/bathroom and laundry. convert existing garage 380 sq ft into living conditioned space. addition new attached 3-car garage 817 sq ft. new gable roof @ entry relocate gas and electric meter to side of new garage; expand existing driveway relocate existing pool equipment
Valuation:
N/A
Permit #:
BIAD21-006935
Status:
final
Fee:
$12,886
Permit Type:
N/A
Building Type:
N/A
Excavate basement to create 630 sq.ft. of habitable space- work shop & laundry.extend existing deck. remodel kitchen. 03/27/14: increase scope of work to include engineered framing repair to roof
Valuation:
$150,000
Permit #:
RB1303854
Status:
final
Fee:
$7,886
Permit Type:
N/A
Building Type:
N/A
(balance of work on permit taken over by new contractor. previous work covered by bld2011-02575). remodel and addition to existing single family residence per approved plans: 1) rebuild 14 x 28 deck (392sf) 2) enclose 18 x 6 front porch (108 hab sf) extending living room. building 3 high by 30 parapet wall at front of residence with cricket and canopies over windows. 3) relocate front... see more
Valuation:
N/A
Permit #:
BLD2013-00337
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel - remove/replace cabinets and countertop 10/08/12 revision to remove interior bearing wall in kitchen area 10-18-12- door repair for dry-rot by laundry room to the outside.(includes replacing door & jamb). --- bma
Valuation:
N/A
Permit #:
BIAL12-006863
Status:
final
Fee:
$1,178
Permit Type:
N/A
Building Type:
N/A
Plumbing second story addition of 420 s.f. to create a master bedroom and bathroom office and closet to an existing one-story 1, 370 s.f. single family dwelling
Valuation:
N/A
Permit #:
RP1502545
Status:
final
Fee:
$342
Permit Type:
N/A
Building Type:
N/A
Mechanical second story addition of 420 s.f. to create a master bedroom and bathroom office and closet to an existing one-story 1, 370 s.f. single family dwelling
Valuation:
N/A
Permit #:
RM1501563
Status:
final
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
Electrical second story addition of 420 s.f. to create a master bedroom and bathroom office and closet to an existing one-story 1, 370 s.f. single family dwelling
Valuation:
N/A
Permit #:
RE1503218
Status:
final
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
Plumbing second story addition of 420 s.f. to create a master bedroom and bathroom office and closet to an existing one-story 1 370 s.f. single family dwelling
Valuation:
N/A
Permit #:
RP1502545
Status:
PERMIT ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Mechanical second story addition of 420 s.f. to create a master bedroom and bathroom office and closet to an existing one-story 1 370 s.f. single family dwelling
Valuation:
N/A
Permit #:
RM1501563
Status:
PERMIT ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical second story addition of 420 s.f. to create a master bedroom and bathroom office and closet to an existing one-story 1 370 s.f. single family dwelling
Valuation:
N/A
Permit #:
RE1503218
Status:
PERMIT ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Permit value$150k excavate basement to create 630 sq.ft. of habitable space- work shop & laundry.extend existing deck. remodel kitchen. 03/27/14: increase scope of work to include engineered framing repair to roof
Valuation:
N/A
Permit #:
RB1303854
Status:
FINAL
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
**install new windows skylights & bay window. replace masonry fireplace remodel entry & replace sheetrock. see attached notice of violation
Valuation:
$28,000
Permit #:
1300005950
Status:
ISSUED
Fee:
N/A
Permit Type:
Bp-1 (1 wk
Building Type:
N/A
Second story addition of 420 s.f. to create a master bedroom and bathroom office and closet to an existing one-story 1 370 s.f. single family dwelling
Valuation:
$95,000
Permit #:
RB1503895
Status:
final
Fee:
$5,923
Permit Type:
N/A
Building Type:
N/A
Bathroom remodel. remove existing closet wall to move shower bathroom and sinks. move existing toilet to parallel wall. new electrical an dlighting per plans
Valuation:
N/A
Permit #:
BIAL17-008111
Status:
final
Fee:
$1,461
Permit Type:
N/A
Building Type:
N/A
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William Patrick Builders License info
Verified License
| License # | 957417 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for William Patrick Builders at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Bonded
| Bonded Agent | Wesco Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Sirius America Insurance Company |
28
Permits
- Building permit records show that William Patrick Builders has worked on 28 permitted projects.
William Patrick Builders Employees
WL
William Patrick Lopes
Sole Owner