Updated: May 28, 2026
Location and Projects
Address
18812 POLLEY LANE, Sonoma, CA, 95476
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William Patrick Builders Construction
Based in Sonoma, William Patrick Builders has been active in the construction industry for over three decades. The company focuses on building projects throughout the Sonoma area, drawing on 36 years of experience in residential construction. William Patrick Builders manages a range of project types, including custom home builds and remodeling work, serving homeowners who want to enhance or develop their properties in Sonoma and the surrounding region. The firm’s longstanding presence reflects a deep familiarity with local building codes, architectural styles, and construction methods specific to Sonoma County. William Patrick Builders approaches each project with practical expertise developed through years of work in the Northern California market, emphasizing reliable project management and proven building techniques tailored to the region’s needs.
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