Updated: Mar 02, 2026
Location and Projects
Address
21643 BIRCH HILL DR, Diamond Bar, CA, 91765
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Alex Chih-shen Lee Construction
Serving Diamond Bar, California, Alex Chih-shen Lee specializes in residential construction and remodeling throughout the local area. With nine years of experience in the industry, Lee offers expertise in a range of home improvement projects, including additions, interior renovations, and structural updates. The firm works with homeowners on projects that enhance both function and appearance, drawing on knowledge of local building requirements and materials suitable for Southern California properties. Lee’s services are tailored to single-family residences, addressing needs such as room expansions, kitchen and bath renovations, and general upgrades. Through a detail-oriented approach and local focus, Alex Chih-shen Lee helps clients realize their vision for improved and updated living spaces in the Diamond Bar community.
Alex Chih-shen Lee Services
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Alex Chih-shen Lee Contact Information
Phone Number: (626) 589-9807
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Address: 21643 BIRCH HILL DR, Diamond Bar, CA 91765
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Alex Chih-shen Lee Diamond Bar
Quality
107
94th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Alex Chih-shen Lee has a BuildZoom score of 107, which places them above 94% of 336,931 contractors in California.
Activity
|
8 projects
|
2025 |
|
13 projects
|
2024 |
|
5 projects
|
2023 |
Our building permit records indicate that Alex Chih-shen Lee has worked on at least
26.0 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
|
6 projects
|
Home Additions |
|
6 projects
|
Multi-room remodels |
|
3 projects
|
Kitchen remodels |
Analyzing permits over the last 4 years shows that Alex Chih-shen Lee mostly works on
multi-room remodel
and home addition
projects.
Pricing
|
2 projects
|
< $5k |
|
1 project
|
$5k-$20k |
|
2 projects
|
$20k-$50k |
|
1 project
|
$50k-$100k |
|
1 project
|
$100k-$250k |
|
1 project
|
$250k-$500k |
The typical size of their permits is approximately $25,000. 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.
Proposed apartment building with ground floor commerical ( retail restaurant core&shell only) (toc affordable housing tier 2) 4 story with mezzanine
Valuation:
$5,748,000
Permit #:
19010-10000-03834
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Single family residence addition 220 sf and remodel 1620 sf
Valuation:
$400,000
Permit #:
XR2024-0832
Status:
issued
Fee:
$9,058
Permit Type:
N/A
Building Type:
N/A
Convert attached garage in to a junior accessory dwelling unit (441 sqft) (unit #c); and subdivide main dwelling of (2 057 sqft) into two to create an accessory dwelling unit of 681 sqft (unit #b) leaving the main dwelling unit at 1376 sqft (unit#a)
Valuation:
$100,000
Permit #:
B202103652
Status:
final
Fee:
$5,008
Permit Type:
N/A
Building Type:
N/A
Shoring for new apartment building under 19010-10000-03834
Valuation:
$325,000
Permit #:
20020-10000-01135
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Repair store front entrance of an existing 2 story commercial building. enlarge the existing restroom. comply with department order effective date 01/15/2021. permit will expire 30 days from issuance date
Valuation:
$25,000
Permit #:
21016-10000-10401
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Supplemental to permit # 21016-10000-10401. plan check only. repair storefront to existing 2-story commerical building. addition to the existing commercial building to enlarge the restroom. permit will be issued under the original permit application 21016-10000-10401. clearances will be added to the original permit application
Valuation:
N/A
Permit #:
21016-10001-10401
Status:
approved
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Building - residential building permit - revision
2025-01-10
Revision to permit br24-2405. remove drop beam at the grid line 3 entrance to kitchen revise hardy frame size remove existing ridge & addition new
Valuation:
$10,000
Permit #:
BR24-3344
Status:
final
Fee:
$383
Permit Type:
N/A
Building Type:
N/A
Single family residence - detached pool house 930 sf
Valuation:
$167,400
Permit #:
0816-2021
Status:
approved
Fee:
$0
Permit Type:
N/A
Building Type:
N/A
Permit to remodel kitchen & master bathroom convert 112sqft bedroom to walk-in closet
Valuation:
$50,000
Permit #:
BR24-2405
Status:
final
Fee:
$1,583
Permit Type:
N/A
Building Type:
N/A
Over lay 1 layer of 15 sq's of shingles over existing 1 layer
Valuation:
$2,500
Permit #:
B24-2031
Status:
final
Fee:
$280
Permit Type:
N/A
Building Type:
N/A
Single family residence interior remodel 600 sf (3 bathrooms & kitchen & stair) and convert garage to gym 188 sf
Valuation:
$0
Permit #:
XR2025-2368
Status:
plan check applied
Fee:
$1,348
Permit Type:
N/A
Building Type:
N/A
Delta 2 struct/delta 4 arch- to revise garage door framing & clarify existing framing near family. room
Valuation:
N/A
Permit #:
REV2024-0294
Status:
approved
Fee:
$346
Permit Type:
N/A
Building Type:
N/A
Delta 1 - struc delta 3 - arch - remove windowand frame-in opening remove prep kitchen frm om scope
Valuation:
N/A
Permit #:
REV2024-0049
Status:
approved
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Delta 2 to addition roof deck railing (additional scope)
Valuation:
$40,000
Permit #:
XR2022-3220
Status:
final
Fee:
$1,374
Permit Type:
N/A
Building Type:
N/A
Delta 2 to addition roof deck railing (additional scope)
Valuation:
$30,000
Permit #:
REV2022-2241
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace (e) 8 windows with a new same size vinyl window
Valuation:
$5,000
Permit #:
BLD25-0426
Status:
issued
Fee:
$486
Permit Type:
N/A
Building Type:
N/A
Single family residence - detached pool house 930 sf change of contractor (renew expired)
Valuation:
N/A
Permit #:
XR2024-0352
Status:
reissued
Fee:
$1,280
Permit Type:
N/A
Building Type:
N/A
Site grading removal and recompact for new apartment under 19010-10000-03834
Valuation:
$7,028
Permit #:
19030-10000-06695
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Change of use of 1-story [25x28] office building to beauty shop. upgrade restroom and non- bearing wall
Valuation:
$20,000
Permit #:
21016-10000-08327
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Manufactured kitchen remodel & remove non-bearing wall 215 sf
Valuation:
$30,000
Permit #:
X2021-2022
Status:
final
Fee:
$1,229
Permit Type:
N/A
Building Type:
N/A
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Alex Chih-shen Lee License info
Verified License
| License # | 577154 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Alex Chih-shen Lee at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
107
BuildZoom Score
Bonded
| Bonded Agent | Ohio Casualty Insurance Company (The) |
| Bond Value | $12,500 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
38
Permits
- Building permit records show that Alex Chih-shen Lee has worked on 38 permitted projects.
Alex Chih-shen Lee Employees
AL
Alex Chih Shen Lee
Sole Owner
AL
Alex Chih-Shen Lee
Sole Owner
ML
Michael Shao Shiuan Lee
Officer