Updated: Jun 02, 2026
Location and Projects
Address
20375 PORTSIDE DR, Walnut, CA, 91789
Use our bidding system to
request a quote
Chung, Yun William Architect
Chung, Yun William, 20375 Portside Dr, Walnut, CA (Employees: Yun Kam Chung and Yun Su Chung) holds a General Engineering license and 4 other licenses according to the California license board.
Their BuildZoom score of 92 ranks in the top 32% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Chung, Yun William, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Chung, Yun William Services
Start a project today:
Chung, Yun William Contact Information
Phone Number: (213) 382-5232
Edit
Address: 20375 PORTSIDE DR, Walnut, CA 91789
Edit
Do you work for this business? Unlock this free profile to update company info and see who's viewing your profile.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Tenant improvement hc bathroom suite 102
Valuation:
$74,750
Permit #:
B201400793
Status:
final
Fee:
$4,179
Permit Type:
N/A
Building Type:
N/A
Similar Contractors See more
License # C29302
Los Angeles, CA
178
BZ Score
$25K
Avg Project
-
Projects
151
BZ Score
$109K
Avg Project
-
Projects
License # 16041
Marina Del Rey, CA
149
BZ Score
$85K
Avg Project
-
Projects
Chung, Yun William Reviews
BuildZoom hasn't received any reviews for Chung, Yun William. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Chung, Yun William License info
Verified License
| License # | 1120310 |
| Status | Active |
| State | California |
| Type | General Engineering |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Chung, Yun William at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 46198 |
| Status | Active |
| State | Arizona |
| Type | Architect |
- BuildZoom verified this license was active as of June 2025.
Verify this license's status for Chung, Yun William at the Arizona Board of Technical Registration.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | ARC.00401023 |
| Status | Active |
| State | Colorado |
| Type | Architect |
- When BuildZoom last verified this license, it had an expiration date of October, 2017. Check the current license status of Chung, Yun William with the Colorado Division of Professions and Occupations
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 401023 |
| Status | Inactive |
| State | Colorado |
| Type | Architect |
- According to the Colorado Division of Professions and Occupations, 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 Chung, Yun William at the Colorado Division of Professions and Occupations.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 696325 |
| Status | Inactive |
| State | California |
| Type | Painting And Decorating |
- 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 Chung, Yun William at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
Bonded
| Bonded Agent | Merchants Bonding Company (Mutual) |
| Bond Value | $25,000 |
Chung, Yun William Employees
CW
Chung, Yun William
Owner
YC
Yun Kam Chung
Sole Owner
YC
Yun Su Chung
Sole Owner
YC
Yun William Chung