Updated: May 17, 2026
Location and Projects
Address
20285 PORTSIDE DRIVE, Walnut, CA, 91789
Use our bidding system to
request a quote
Jun Hang Yang Construction
Jun Hang Yang at 20285 PORTSIDE DRIVE, Walnut, CA 91789, held a General Contractor license (#420488) with the California contractors license board with an expiration date of 04-30-1996. We last verified the license was expired on 05-08-2026.
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 project planner to be easily matched to qualified, licensed professionals in your area.
Jun Hang Yang Services
Start a project today:
Jun Hang Yang Contact Information
Phone Number: (510) 928-9031
Edit
Address: 20285 PORTSIDE DRIVE, 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.
Jun Hang Yang Walnut
Quality
Alert*
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
*No active license on file. If you are Jun Hang Yang, click “This is My Business” to update your information.
Activity
|
1 project
|
2025 |
|
1 project
|
2024 |
Our building permit records indicate that Jun Hang Yang has worked on at least
2.0 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.
Pricing
|
1 project
|
$20k-$50k |
|
1 project
|
$250k-$500k |
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.
(n) 1 177 sf detached adu. consisting of 3 beds 3bathv unit
Valuation:
$300,000
Permit #:
BLD2025-04817
Status:
issued
Fee:
$12,528
Permit Type:
New accessory dwe...
Building Type:
N/A
20/f suite 2018 and 2020: revision to permit 202212289249. partial acoustical tile suspended ceiling and new lighting throughout the suites
Valuation:
$30,000
Permit #:
202308084008
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Ground floor - commercial tenant improvement - demise (e) space into 2 seperate units building out to northern unit to include non structural partition walls new suspended ceiling lighting. new electrical new ada compliant entry on fair ave. new service sink (e) bathroom fixtures to be replaced in kind. hvac under sep
Valuation:
$113,000
Permit #:
201801299809
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Supplemental to permit #22044-10000-03346 to add: (2) evaporative coolers: replace two make up air units
Valuation:
N/A
Permit #:
22044-30001-03346
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Ground floor - commercial tenant improvement - demise (e) space into 2 seperate units building out to northern unit to include non structural partition walls new suspended ceiling lighting. new electrical new ada compliant entry on fair ave. new service sink (e) bathroom fixtures to be replaced in kind. hvac under sep
Valuation:
$113,000
Permit #:
201801299809
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Demolish lathe & plaster at 2nd & 3rd flrs. remove load bearing wall btw dining and kitchen. reinforce roof framing @ 2nd floor living room. remodel 1 kitchen & 3 bathrooms. reframe bedroom closets @3rd floor. relocate & expand master bathroom @3rd. replace/add interios doors
Valuation:
$80,000
Permit #:
201805290317
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Revision to previously approved plans 13042-20000-17119. pipe material change from aquatherm to copper type l in the potable water mains
Valuation:
N/A
Permit #:
22042-10000-06093
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
2nd and 3rd floors: 20 lights 15 switches 20 receptacles 4 fans 1 dishwasher 1 garbage disposal 1 microwave 1 range 4 smoke detectors; relocate/add outlets and lightts for 3 bathroom remodels. new outs for new kitchen island. ad (20) new lights throughout 2nd and 3rd floors. refer to pa # 201805290317 for dwgs
Valuation:
N/A
Permit #:
E201805303455
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
2nd and 3rd floors: relocate plumbing for 3 bathroom remodel. addition kitchen island sink. addition bathroom tub in master bathroom. shower pan; refer to pa #
Valuation:
N/A
Permit #:
PP20180530837
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Supplemental to permit 21044-90000-06189 to change address to 254 256 256 1/2 258 s alexandria av
Valuation:
N/A
Permit #:
21044-10001-06189
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Tenant improvement. general hvac and environmental vent systems
Valuation:
N/A
Permit #:
22044-20000-08802
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
G/f- soft demolish on g/f commercial office space remove all partitions no structural work per ab-017 space to remain vacant
Valuation:
$20,113
Permit #:
201711164169
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
G/f- soft demolish on g/f commercial office space remove all partitions no structural work per ab-017 space to remain vacant
Valuation:
$20,113
Permit #:
201711164169
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Tenant improvement to construct 2 musical rooms one show room and storage room total 1265 sf. new hvac system new electrical system. one existing accesible restroom - no work
Valuation:
N/A
Permit #:
BLD2018-00176
Status:
complete
Fee:
N/A
Permit Type:
Simple permit
Building Type:
N/A
Residential- soft story retrofit per sfebc chapter 4d: 2016 cebc appendix a-4
Valuation:
$40,000
Permit #:
201711012871
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Residential- soft story retrofit per sfebc chapter 4d: 2016 cebc appendix a-4
Valuation:
$40,000
Permit #:
201711012871
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Commercial- soft story retrofit per sfebc chapter 4d: 2016 cebc appendix a-4
Valuation:
$20,000
Permit #:
201711012873
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Commercial- soft story retrofit per sfebc chapter 4d: 2016 cebc appendix a-4
Valuation:
$20,000
Permit #:
201711012873
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Supplemental permit to 18044-10000-14268 to change to 810 e pico blvd #206-210
Valuation:
N/A
Permit #:
18044-10001-14268
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
(eplan) gas line with electrical *epr*
Valuation:
N/A
Permit #:
00855974-RMO
Status:
triage
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Similar Contractors See more
242
BZ Score
$59K
Avg Project
-
Projects
193
BZ Score
$200K
Avg Project
-
Projects
188
BZ Score
$30K
Avg Project
-
Projects
License # 1154938
Walnut, CA
92
BZ Score
-
Avg Project
-
Projects
License # 1154619
Walnut, CA
92
BZ Score
-
Avg Project
-
Projects
Jun Hang Yang Reviews
BuildZoom hasn't received any reviews for Jun Hang Yang. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Jun Hang Yang License info
Inactive License
| License # | 420488 |
| Status | Inactive |
| State | California |
| Type | Painting And Decorating |
| 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 Jun Hang Yang at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 877325 |
| 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 Jun Hang Yang at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
- How the BuildZoom Score works
- *No active license on file. If you are Jun Hang Yang, click “This is My Business” to update your information.
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
33
Permits
- Building permit records show that Jun Hang Yang has worked on 33 permitted projects.
Jun Hang Yang Employees
JY
Jun Hang Yang
Sole Owner
JY
Jun Suk Yang
Sole Owner