Updated: Jul 04, 2026
Location and Projects
Address
3822 CASTLE ROCK ROAD, Diamond Bar, CA, 91765
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Will Hsu Construction
Will Hsu at 3822 CASTLE ROCK ROAD, Diamond Bar, CA 91765, held a General Contractor license (#977991) with the California contractors license board with an expiration date of 07-31-2029. We last verified the license was inactive on 07-03-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 336,931 California contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our bidding system to be easily matched to qualified, licensed professionals in your area.
Will Hsu Services
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Will Hsu Contact Information
Phone Number: (626) 774-4937
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Address: 3822 CASTLE ROCK ROAD, Diamond Bar, CA 91765
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Will Hsu Diamond Bar
Quality
Alert*
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
*No active license on file. If you are Will Hsu, click “This is My Business” to update your information.
Activity
|
4 projects
|
2025 |
|
4 projects
|
2024 |
|
4 projects
|
2023 |
Our building permit records indicate that Will Hsu has worked on at least
12.0 projects 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
|
< $5k |
|
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.
Combo residential – building – alteration (includes meps)
2025-02-03
Non-structural kitchen and nook remodel includes all related mechanical electrical and plumbing *** subject to field inspection ***
Valuation:
$38,400
Permit #:
COMR-2025-0051
Status:
pre-issuance status
Fee:
$1,320
Permit Type:
N/A
Building Type:
N/A
(s15) brs2400090 new two story single family dwelling w attached garage basement storage and mechanical room terrace water feature front entry and roof decks -- solar grading permit: bgr2400044 new single family residence with 5 bedrooms 6 baths. 2 pwdr rooms 910 sf garage 1998 sq ft deck/patio septic. deferred: solar landscaping pool stairs fire sprinkler. no gas/propane tank-house i... see more
Valuation:
N/A
Permit #:
FPRBP2400292
Status:
triage
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(s15) bgr2400044 fire grading permit review. fire dept permit number: fprbp2400292 (kennith johnson) grading permit number: bgr2400044 building permit number: brs2400090
Valuation:
N/A
Permit #:
FPRBP2400772
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00961111-WHTR
Status:
final
Fee:
$57
Permit Type:
N/A
Building Type:
N/A
Wmsr-06: [new/replace] sewer connection | additional details: -
Valuation:
N/A
Permit #:
00913553-WMSR
Status:
final
Fee:
$80
Permit Type:
N/A
Building Type:
N/A
(eplan) roof mounted photovoltaic system
Valuation:
N/A
Permit #:
00925870-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(e-plan) spa. gas and electric for bbq
Valuation:
$50,000
Permit #:
00924489-RMO
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Outdoor kitchen (no sink) w pe
Valuation:
$1,000
Permit #:
B25-018876
Status:
issued
Fee:
$722
Permit Type:
N/A
Building Type:
N/A
(e plan) (1) gasline and electric to bbq
Valuation:
N/A
Permit #:
00913389-RMO
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(eplan) roof top solar system w/msp de-rate
Valuation:
N/A
Permit #:
00909651-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(e-plan) attached solid roof patio cover
Valuation:
N/A
Permit #:
00908256-RRA
Status:
triage
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(eplan) roof mounted photovoltaic system
Valuation:
N/A
Permit #:
00905616-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(e-plan) roof mounted photovoltaic system
Valuation:
N/A
Permit #:
00900212-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(eplan) roof mounted photovoltaic system
Valuation:
N/A
Permit #:
00894843-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Interior improvement install new light and outlet
Valuation:
N/A
Permit #:
19041-10000-41428
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
(e-plan) roof mounted photovoltaic system
Valuation:
N/A
Permit #:
00889116-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(eplan) electrical sink and gas for fire pit and bbq
Valuation:
N/A
Permit #:
00836842-MISR
Status:
triage
Fee:
$175
Permit Type:
N/A
Building Type:
N/A
(eplan) electrical sink and gas for fire pit and bbq
Valuation:
N/A
Permit #:
00836840-RMO
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(e-plan) roof mounted photovotaic solar system
Valuation:
N/A
Permit #:
00841379-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Interior remodel to include adding 1 new bedroom 2 new full bathrooms & new windows
Valuation:
N/A
Permit #:
00761406-RRA
Status:
triage
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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License # 1157614
Diamond Bar, CA
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Projects
Will Hsu Reviews
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Will Hsu License info
Inactive License
| License # | 977991 |
| 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 Will Hsu at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
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- *No active license on file. If you are Will Hsu, click “This is My Business” to update your information.
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $12,500 |
42
Permits
- Building permit records show that Will Hsu has worked on 42 permitted projects.
Will Hsu Employees
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Will Hsu
Sole Owner
WH
Will Hsu
Sole Owner