Updated: Apr 18, 2026
Location and Projects
Address
513 BREGANTE DRIVE, Diamond Bar, CA, 91765
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DDY Improvement Corp
DDY Improvement Corp, 513 Bregante Dr, Diamond Bar, CA (Employees: Chi Wai Tam, Shu Qiu Tong, and Taiyu Ding) holds a General Building license according to the California license board.
Their BuildZoom score of 95 ranks in the top 22% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring DDY Improvement Corp, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
DDY Improvement Corp Services
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DDY Improvement Corp Contact Information
Phone Number: (626) 532-6370
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Address: 513 BREGANTE DRIVE, Diamond Bar, CA 91765
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This is a sample of this contractor's permits. Click here to access their complete permit history.
20 window change-out (same size & type) for residential buildings. dual glazing labeled and certified by national fenestration rating council (nfrc) is required for doors and windows replaced in all residential buildings three stories or less per section 150(b) 1b of title 24
Valuation:
$6,200
Permit #:
19016-10000-29977
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
New detached accessory dwelling unit (adu) (1200 sf) with 3 bedrooms and 3 bathrooms
Valuation:
N/A
Permit #:
BLD-2024-01105
Status:
issued
Fee:
$6,774
Permit Type:
N/A
Building Type:
N/A
Rooms addition of 2nd story at 499 s/f and covered balcony @ 295 s/f
Valuation:
$100,000
Permit #:
BLD2014-01105
Status:
Issued
Fee:
N/A
Permit Type:
General
Building Type:
N/A
Remove & addition wall between kitchen & den
Valuation:
$15,000
Permit #:
00640636-RBPR
Status:
final
Fee:
$313
Permit Type:
N/A
Building Type:
N/A
Remove & addition wall between kitchen & den
Valuation:
$0
Permit #:
00637662-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Water heater change-out and relocate to exterior in metal enclosure: 40 gallons
Valuation:
N/A
Permit #:
B201101775
Status:
final
Fee:
$48
Permit Type:
plumbing
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
DDY Improvement Corp License info
Verified License
| License # | 925637 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for DDY Improvement Corp at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
95
BuildZoom Score
Bonded
| Bonded Agent | Nationwide Mutual Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
DDY Improvement Corp Employees
CT
Chi Wai Tam
Rme
ST
Shu Qiu Tong
Officer
TD
Taiyu Ding
Rmo / Ceo / Pres
TD
Taiyu Ding
Rmo / Ceo / Pres