Updated: Jan 30, 2026
Location and Projects
Address
2243 VEGAS AVE, Castro Valley, CA, 94546
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Sean Chau Photos
Sean Chau Roofer
Sean Chau, 2243 Vegas Ave, Castro Valley, CA (Employee: Sean Chau) holds a Roofing license according to the California license board.
Their BuildZoom score of 114 ranks in the top 2% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Sean Chau, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Sean Chau Contact Information
Phone Number: (415) 858-2213
Address: 2243 VEGAS AVE, Castro Valley, CA 94546
Sean Chau Castro Valley
Quality
114
98th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Sean Chau has a BuildZoom score of 114, which places them above 98% of 336,931 contractors in California.
Activity
|
58 projects
|
2025 |
|
30 projects
|
2024 |
Our building permit records indicate that Sean Chau has worked on at least
88.0 projects over the past 2 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.
Experience
|
88 projects
|
Roofing projects |
Analyzing permits over the last 4 years shows that Sean Chau mostly works on
roofing project
projects.
Pricing
|
10 projects
|
< $5k |
|
66 projects
|
$5k-$20k |
The typical size of their permits is approximately $7,500. This graph shows the distribution of these job values.
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.
Remove all (e) roofing keep all (e) sheathing. on main house pitched roof - install 15 sq. (n) 30-year certainteed landmark comparable shingles. on main house flat roof - install 4 sq. (n) modified bitumen torch-down roofing. on possibly unfinaled detached 400 sf storage shed from 1959 remove (e) roofing keep (e) sheathing install 4 sq. (n) comparable shingles. per cbo work will not b... see more
Valuation:
$9,500
Permit #:
BRROOF-25-0008
Status:
final
Fee:
$452
Permit Type:
N/A
Building Type:
N/A
Reroof - one/two family residential new roof: tear-out and composition asphalt shingle class a area 1800 sf use existing roof deck remove composition asphalt shingle existing roofing est. 2 ton to be recycled
Valuation:
$7,578
Permit #:
BLD2025-02888
Status:
final
Fee:
$0
Permit Type:
Reroof - single f...
Building Type:
N/A
Re-roof tear-off install new asphalt shingles replace all roof flashings replace all gutters and downspouts
Valuation:
$11,000
Permit #:
RW25-0231
Status:
revoked
Fee:
$334
Permit Type:
N/A
Building Type:
N/A
Remove existing roofing layer; keep (e) sheathing; install 20 sq. (n) asphalt shingles
Valuation:
$9,800
Permit #:
BRROOF-25-0194
Status:
final
Fee:
$454
Permit Type:
N/A
Building Type:
N/A
Roofing overlay - addition 2nd layer. install one layer of modify bitumen with torch down at flat roof. no work to front slope roof. no structural work. need hot works permit
Valuation:
$4,500
Permit #:
202410042325
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Re-roofing with torch down. no work to (e) roof structural sheathing
Valuation:
$12,500
Permit #:
202506098210
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Re-roofing with torch down. no work to (e) roof structural sheathing
Valuation:
$7,800
Permit #:
202506098207
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Re-roofing overlay with torch. apply aluminum roof coating
Valuation:
$20,000
Permit #:
202504214900
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
15 - retail sales
Re-roof. hot work. tear off install modify bitumen
Valuation:
$20,000
Permit #:
202507019882
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Re-roof. hot work. tear off install modify bitumen
Valuation:
$7,500
Permit #:
202507019884
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Re-roofing install modify bitumen rubber with torch
Valuation:
$7,500
Permit #:
202505075961
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Tear off existing wood shingles. install new sheathing and underlayment. install new certanteed-landmark pro chingles @ 25 squares
Valuation:
$12,000
Permit #:
BD-2024-294231
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Reroofing tear off fiber glass base sheet instll modify bitumen with torch apply one layer aluminum roof coating torch down
Valuation:
$8,000
Permit #:
202412237334
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remove existing tar and gravel roofing and install 20 years manufacture’s warranty modify bitumen (dibiten) rubber roofing
Valuation:
$7,000
Permit #:
BLD2024-05967
Status:
complete
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Re-roofing aspalts shingles. no torch
Valuation:
$12,000
Permit #:
202504214899
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Re-roofing no torch down
Valuation:
$20,000
Permit #:
202507019899
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Need re-roof permit; tear off and reroof class a shingles color: gray 15 squares
Valuation:
$8,000
Permit #:
BL-ROOF-2025-00118
Status:
complete
Fee:
$625
Permit Type:
N/A
Building Type:
N/A
Re-roofing (no hotworks)
Valuation:
$8,000
Permit #:
202509195745
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Re-roofing with torch down
Valuation:
$7,500
Permit #:
202507019900
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Re-roofing with firework
Valuation:
$7,500
Permit #:
202505277273
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Sean Chau Reviews
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Verified License
BuildZoom confirmed this contractor's license
Sean Chau License info
Verified License
| License # | 1116141 |
| Status | Active |
| State | California |
| Type | Roofing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Sean Chau at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
114
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $25,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
88
Permits
- Building permit records show that Sean Chau has worked on 88 permitted projects.
Sean Chau Employees
SC
Sean Chau
Sole Owner