Updated: May 02, 2026
Location and Projects
Address
3366 THORN RD, Sebastopol, CA, 95472
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Castor Construction
Castor Construction, 3366 Thorn Rd, Sebastopol, CA (Owned by: Patrick Raymond Castor) holds a General Building license and 4 other licenses 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 Castor Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Castor Construction Services
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Castor Construction Contact Information
Phone Number: (916) 757-9551
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Address: 3366 THORN RD, Sebastopol, CA 95472
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Castor Construction Sebastopol
Quality
94
76th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Castor Construction has a BuildZoom score of 94, which places them above 76% of 336,931 contractors in California.
Activity
|
1 project
|
2023 |
Our building permit records indicate that Castor Construction has worked on at least
1.0 project over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
|
1 project
|
$20k-$50k |
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Residential remodel of 890 sf within an existing single family residence gross floor space is 3, 164 sf. remodel includes the existing dining room kitchen living room and laundry room. project will include selective demolition - to include removal of interior walls and the relocation of 1 window and sliding glass door leading to the patio area - and modification of electrical and plum... see more
Valuation:
$115,000
Permit #:
B19-5502
Status:
final
Fee:
$1,222
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel and 88sf addition. scope of work does not exceed 50% of gross floor area; therefore no sprinklers are required.addition is within existing footprint
Valuation:
$111,688
Permit #:
B18-2789
Status:
final
Fee:
$1,556
Permit Type:
N/A
Building Type:
N/A
Sfd- interior remodel(1456 sf)_ w/(n) deck 84sf
Valuation:
N/A
Permit #:
BLD21-6535
Status:
final
Fee:
$3,936
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel like for like & r&r (2) kitchen windows
Valuation:
$32,000
Permit #:
B21-0395
Status:
issued
Fee:
$735
Permit Type:
Single family dwe...
Building Type:
N/A
Convert existing bedroom into new laundry room per plan
Valuation:
$9,100
Permit #:
B19-1197
Status:
final
Fee:
$350
Permit Type:
N/A
Building Type:
N/A
Remodel/alteration to legalize unpermitted work under ce17-0677 also see lma18-003. approval otc by a.trippel & ok to issue permit per m.maystrovich
Valuation:
$47,040
Permit #:
B18-8242
Status:
final
Fee:
$797
Permit Type:
N/A
Building Type:
N/A
Remodel single family dwelling within kitchen ff bathroom butlers pantry kitchen pantry entry way and hallway. also remove fireplace from family room
Valuation:
$150,000
Permit #:
B07-1223
Status:
final
Fee:
$1,795
Permit Type:
N/A
Building Type:
N/A
Convert attic to bedroom with bathroom
Valuation:
$40,000
Permit #:
B16-3676
Status:
final
Fee:
$6,654
Permit Type:
N/A
Building Type:
N/A
Bathroom remodel. no plan required
Valuation:
$14,500
Permit #:
B16-3785
Status:
final
Fee:
$209
Permit Type:
N/A
Building Type:
N/A
Ncus arc lot 52
Valuation:
$326,843
Permit #:
NCUS04-02735-0
Status:
complete
Fee:
N/A
Permit Type:
New single family...
Building Type:
Residential sf sm...
Repair fire damaged home - replace roof structure, electric, plumbing, hvac, ect.
Valuation:
$40,000
Permit #:
CBA2002-01601
Status:
Finaled
Fee:
$715
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
GRAD04-04035-0
Status:
complete
Fee:
N/A
Permit Type:
Grading permit ap...
Building Type:
Residential sf sm...
No Description Available
Valuation:
N/A
Permit #:
ENCR04-04034-0
Status:
complete
Fee:
N/A
Permit Type:
Encroachment permit
Building Type:
Residential sf sm...
Electrical for septic system re: bld04-0489 - sep04-0062
Valuation:
N/A
Permit #:
BLD07-5186
Status:
final
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
396 sq.ft. family room addition
Valuation:
N/A
Permit #:
B09-1307
Status:
final
Fee:
$1,108
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
NCUS04-02735
Status:
final
Fee:
$16,363
Permit Type:
N/A
Building Type:
N/A
Reroof
Valuation:
$3,000
Permit #:
RER2003-02463
Status:
Finaled
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
GRAD04-04035
Status:
final
Fee:
$205
Permit Type:
Grading permit
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
ENCR04-04034
Status:
final
Fee:
$610
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$326,843
Permit #:
NRES04-02735
Status:
final
Fee:
$16,363
Permit Type:
N/A
Building Type:
N/A
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BZ Score
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Castor Construction Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Castor Construction License info
Verified License
| License # | 819754 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Castor Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 393450 |
| 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 Castor 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 # | 675585 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- 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 Castor 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 # | 963832 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- 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 Castor 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 # | 561365 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- 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 Castor Construction 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 | Hudson Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
13
Permits
- Building permit records show that Castor Construction has worked on 13 permitted projects.
Castor Construction Employees
CP
Castor Patrick
Entity
DC
Dustin Hollis Castor
General Partner
GC
Garth Stewart Castor
Sole Owner
OA
Otgonbaatar Avirmed
Sole Owner
OA
Otgonbaatar Avirmed
Sole Owner
PC
Patrick Raymond Castor
Owner
TC
Tauzer Construction
Entity