Updated: Dec 23, 2025
Location and Projects
Address
20601 ALDA CT, Walnut, CA, 91789
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Chen, Yeshen Jason Construction
Serving the Walnut, California area, Yeshen Jason Chen brings nearly four decades of construction experience to residential and commercial projects. With 38 years in the industry, Chen has overseen construction and remodeling work throughout Southern California, including building permits for a range of project sizes and complexities. His background includes work on both single-family homes and larger multi-unit residences, reflecting versatility across property types. Chen is known for managing projects that require adherence to local building codes and permitting processes, guiding clients through each phase of construction from initial planning to completion. Clients in Walnut and the surrounding areas rely on his experience navigating complex regulatory environments and coordinating multi-trade teams on site.
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Chen, Yeshen Jason Contact Information
Address: 20601 ALDA CT, Walnut, CA 91789
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Chen, Yeshen Jason Walnut
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Chen, Yeshen Jason has a BuildZoom score of 108, which places them above 95% of 336,931 contractors in California.
Activity
|
40 projects
|
2025 |
|
50 projects
|
2024 |
|
37 projects
|
2023 |
Our building permit records indicate that Chen, Yeshen Jason has worked on at least
127.0 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.
Experience
|
36 projects
|
Home Additions |
|
21 projects
|
Commercial Renovations |
|
12 projects
|
New Constructions |
|
14 projects
|
Kitchen remodels |
|
3 projects
|
Multi-room remodels |
Analyzing permits over the last 4 years shows that Chen, Yeshen Jason mostly works on
home addition
and commercial renovation
projects.
Pricing
|
11 projects
|
< $5k |
|
14 projects
|
$5k-$20k |
|
22 projects
|
$20k-$50k |
|
31 projects
|
$50k-$100k |
|
19 projects
|
$100k-$250k |
|
9 projects
|
$250k-$500k |
|
1 project
|
$500k-$1mil |
The typical size of their permits is approximately $50,000. 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.
435 sf 1st floor addition 1 045 sf of 2nd floor addition new 35 sf porch and existing 400 sf carport converting to attached garage
Valuation:
$270,546
Permit #:
B24-1245
Status:
issued
Fee:
$14,722
Permit Type:
N/A
Building Type:
N/A
Change of use from retail to massage parlor new interior non load bearing partitions where any person who provides massage service at this premise shall be certified as a massage therapist or massage practitioner pursuant to california business and professions section 4600 et esq
Valuation:
$25,000
Permit #:
25016-10000-00941
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
New proposed two bedroom three bathroom 855 sf adu. new proposed adu shall include new kitchen and living room. new 331 sf one car garage attached to adu
Valuation:
$164,567
Permit #:
B25-0228
Status:
issued
Fee:
$22,661
Permit Type:
N/A
Building Type:
N/A
Change of use from warehouse to a take-out resturant interior and exterior alteration new mechanical equipment on roof. comply with department order effective date 09/24/2021. permit will expire 30 days from issuance date
Valuation:
$400,000
Permit #:
20016-40000-01593
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Eplan: convert the existing recreation room (630 sq. ft.) at parking level within an existing apartment building into an accessory dwelling unit per gc 66323(a)(3)
Valuation:
$45,000
Permit #:
24016-20000-33138
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Eplan: change of use from existing restaurant to (retail wholesale retail showroom) and tenant improvement. including new interior non-bearing partitions transaction counter and display counter restroom breakroom hard-lid ceiling throughout lighting and finishes
Valuation:
$92,000
Permit #:
24016-10000-12451
Status:
triage
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Interior non-structural tenant improvement. no change of use. new retail store anta
Valuation:
$400,000
Permit #:
BS2501835
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Commercial low gen
Convert existing garage into adu 366 sq ft and convert portion of the existing unit a 594 sq ft into proposed attached adu per ordianance and lamc 12.22a33(c)&(e). total adu = 960 sq ft new gable roof over existing building
Valuation:
$125,000
Permit #:
23016-10000-20617
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Existing poke restaurant to be new matcha ice cream shop - new seating area to be revised. new front counter new kitchen equipment to be added to boh area. all mechanical work is existing to remain
Valuation:
$50,000
Permit #:
B25-0877
Status:
issued
Fee:
$5,501
Permit Type:
N/A
Building Type:
N/A
Addition to and conversion of detached garage into adu per ordinance lamc 12.22 a.33(b)(1). all work per wfpp
Valuation:
$120,000
Permit #:
23014-20000-03858
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Eplan. tenant improvement of a grocery shop and deli kitchen of the existing commercial (first floor) space of approximately 708 s.f. floor area install new flooring ceiling casework food service equipment. re-use the existing hvac system minorly adjust the existing electrical & plumbing sysyem. mep- under separate permit
Valuation:
$10,000
Permit #:
24016-10000-07458
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Non-residential building alteration-repair
2022-03-03
T. i. for restaurant change of use dining area and new storage room 09/29/2021 electrical work: 200a with (12) circuit breaker. 1 subpanel. (22) receptacle. (12) light fixture b21-0359
Valuation:
$300,800
Permit #:
B19-0469
Status:
final
Fee:
$10,024
Permit Type:
N/A
Building Type:
N/A
Permit to complete work started on b21-1058 tenant improvement. to create new resturant unit 201 demising wall under b23-0507 06/27/2023 gas meter (lw)
Valuation:
$192,980
Permit #:
B24-1294
Status:
issued
Fee:
$2,322
Permit Type:
N/A
Building Type:
N/A
Eplan remodel (e) 2-story single family dwelling and convert portion of existing 1st floor to 500 sq ft jadu and convert portion of existing 1st and 2nd floor to 892 sq ft accessory dwelling unit per state law and remove existing attached carport
Valuation:
$10,000
Permit #:
23014-10000-01428
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Tenant improvement. work for restaurant. new front counter change under hood cooking equipment. all mechanical or electrical work is existing to remain
Valuation:
$79,841
Permit #:
B25-0888
Status:
issued
Fee:
$7,456
Permit Type:
N/A
Building Type:
N/A
Eplan - conversions of an exiting accessory living quarters into an adu per state law. nfpa 13d fire sprinkler through-out
Valuation:
$50,000
Permit #:
25010-20000-01285
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Addition irregular 17'-0 x 15'-0 for new dinging room & 8'-0 x 5'-6"for bathroom enclose (e) 8'-0 x 14'-0 patio to enlarge living room remodel (e) kitchen/closets/laundry/bedrooms addition 7'-9 x 15'-7 to extend (e) kitchen and entry partial roof reframing. all work per engineering
Valuation:
$70,000
Permit #:
20014-20000-04524
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Full plan check for a frst time tennant scope of work incldues new cricuits populating existing panels all connected to an existing 800a service (120/240 3p, 4w) total affected area is 6957 sqft. note all sub panels along with the service were approved under 19041-10k-20938. this permit covers the tenant improvement only
Valuation:
N/A
Permit #:
19041-10000-42804
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Existing retail suite a and b change to restaurant. interior only. new equipment type i hood kitchen walk-in cooler and freezer hard-lid ceiling in soffit and restroom lighting
Valuation:
$125,000
Permit #:
B24-0137
Status:
plancheck
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Kitchen laundry bathroom interior remodel and 197.62 sq. ft. of rebuild existing covered patio with outdoor kitchen and (n) balcony above
Valuation:
$50,000
Permit #:
B24-1908
Status:
plancheck
Fee:
$1,379
Permit Type:
N/A
Building Type:
N/A
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Chen, Yeshen Jason License info
Verified License
| License # | CAC40169 |
| Status | Active |
| State | California |
- BuildZoom has not verified this license since June, 2015.
Verify this license's status for Chen, Yeshen Jason at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
1K
Permits
- Building permit records show that Chen, Yeshen Jason has worked on 1035 permitted projects.