Updated: May 13, 2026
Location and Projects
Address
19201 SONOMA HIGHWAY 227, Sonoma, CA, 95476
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Thomas Thornley Construction
Based in Sonoma, Thomas Thornley Construction specializes in residential building and remodeling projects throughout Sonoma County. Drawing on nearly four decades of experience, the company manages a range of home improvement services, including new home construction, major renovations, and additions. Projects have included both interior and exterior work, such as kitchen remodels, bathroom updates, and structural modifications to existing properties. The firm works with homeowners seeking to upgrade or expand their living spaces, guiding projects from planning through completion. With an established presence in the local area, Thomas Thornley Construction’s portfolio covers a variety of single-family homes and residential properties in Sonoma and nearby communities. Clients partner with this contractor for expertise in coordinating complex building projects tailored to the region's architectural styles and homeowner needs.
Thomas Thornley Construction Services
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Thomas Thornley Construction Contact Information
Phone Number: (707) 227-9920
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Address: 19201 SONOMA HIGHWAY 227, Sonoma, CA 95476
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Building Permits by Thomas Thornley Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
Single family dwelling replace siding stucco install (n) waterproofing at terrace deck (n) deck floor finishes (n) liquid-applied rough opening flashings at windows/doors. remove & reinstall (e) windows/doors and deck guardrails when complete
Valuation:
N/A
Permit #:
BLD24-6242
Status:
final
Fee:
$619
Permit Type:
N/A
Building Type:
N/A
Replacement single family dwelling (2 668 sf) with jadu (500 sf) covered porches (723 sf) decks (1 119 sf) prefab hot tub & attached garage (1 970 sf) *demo of existing single family dwelling under dem22-0323*
Valuation:
N/A
Permit #:
BLD22-8108
Status:
issued
Fee:
$10,949
Permit Type:
N/A
Building Type:
N/A
Conduit 1750 (grd16-0226) trench @ driveway to future single family dwelling site
Valuation:
N/A
Permit #:
BLD17-3954
Status:
final
Fee:
$241
Permit Type:
N/A
Building Type:
N/A
For (e) tree damaged single family dwelling - 40% exploratory demolish to be followed up by new future permit to restore
Valuation:
N/A
Permit #:
DEM17-0063
Status:
final
Fee:
$156
Permit Type:
N/A
Building Type:
N/A
Construction of a new main dwelling
Valuation:
$1,500,000
Permit #:
B16-00298
Status:
final
Fee:
$23,900
Permit Type:
N/A
Building Type:
N/A
New entry gate with knox box & retaining wall
Valuation:
$100,000
Permit #:
B18-01519
Status:
final
Fee:
$3,516
Permit Type:
N/A
Building Type:
N/A
Covnert existing to guest house: barn relocation (b15-01444)
Valuation:
$100,000
Permit #:
B16-01951
Status:
final
Fee:
$4,200
Permit Type:
N/A
Building Type:
N/A
Historical -sfd remodel 1637 sq ft covered porch 513 sqft
Valuation:
N/A
Permit #:
BLD17-6149
Status:
final
Fee:
$5,715
Permit Type:
N/A
Building Type:
N/A
Remodel 2104 sf - single family dwelling
Valuation:
N/A
Permit #:
BLD15-6432
Status:
final
Fee:
$4,575
Permit Type:
N/A
Building Type:
N/A
Dwelling alteration: relocation and alteration of an existing water tower - 1st floor changing room 2nd floor play room & 3rd floor sitting room with plumbing mechanical exhaust and electrical per plan & code
Valuation:
$250,000
Permit #:
B17-00849
Status:
final
Fee:
$6,333
Permit Type:
N/A
Building Type:
N/A
Demolition of existing 2, 663 sf residence garage is 400 sf (j# asb126071)
Valuation:
N/A
Permit #:
DEM22-0323
Status:
final
Fee:
$483
Permit Type:
N/A
Building Type:
N/A
New equipment shed
Valuation:
$50,000
Permit #:
B16-01952
Status:
final
Fee:
$1,949
Permit Type:
N/A
Building Type:
N/A
2-10 000 gallon new water tanks 1- fire protection; 1-domestic water
Valuation:
$25,000
Permit #:
B16-01953
Status:
final
Fee:
$1,560
Permit Type:
N/A
Building Type:
N/A
Replace gas line to pool and bbq
Valuation:
$20,000
Permit #:
B15-01708
Status:
final
Fee:
$1,008
Permit Type:
N/A
Building Type:
N/A
Res-pool demolition
Valuation:
N/A
Permit #:
DEM23-0045
Status:
final
Fee:
$382
Permit Type:
N/A
Building Type:
N/A
Demolish of deatached garage 924 square feet (j# 5b064)
Valuation:
$5,000
Permit #:
B17-00582
Status:
final
Fee:
$193
Permit Type:
N/A
Building Type:
N/A
New agricultural pump house
Valuation:
$160,000
Permit #:
B16-00713
Status:
final
Fee:
$3,619
Permit Type:
N/A
Building Type:
N/A
Detached exercise room & trellis adjacent to new dwelling (b16-00298)
Valuation:
$80,000
Permit #:
B16-00352
Status:
final
Fee:
$2,739
Permit Type:
N/A
Building Type:
N/A
Interior remodel with potential exterior changes (not an addition)
Valuation:
N/A
Permit #:
B14-0935
Status:
final
Fee:
$2,267
Permit Type:
N/A
Building Type:
N/A
Residence re-roof
Valuation:
N/A
Permit #:
00112528-MISC
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Thomas Thornley Construction License info
Verified License
| License # | 1000620 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership, Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Thomas Thornley Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 380853 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership, 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 Thomas Thornley Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
100
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
11
Permits
- Building permit records show that Thomas Thornley Construction has worked on 11 permitted projects.
Thomas Thornley Construction Employees
TT
Thomas Kenneth Thornley
Rmo / Ceo / Pres
WC
William Bruce Crawford
Officer