Updated: May 02, 2026
Location and Projects
Address
144 21ST AVE, San Francisco, CA, 94121
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Chen's Plumbing Inc
Chen's Plumbing Inc, 144-21 St Ave, San Francisco, CA (Employees: Bonita Bet Wah Wong, Humphrey Yong Hui Chen, and Justin Xing Sheng Chen) holds a Plumbing, Fire Protection, Boiler, Hot Water Heating And Steam Fitting license and 3 other licenses according to the California license board.
Their BuildZoom score of 108 ranks in the top 5% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Chen's Plumbing Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Chen's Plumbing Inc Services
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Chen's Plumbing Inc Contact Information
Phone Number: (415) 939-6118
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Address: 144 21ST AVE, San Francisco, CA 94121
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Chen's Plumbing Inc San Francisco
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Chen's Plumbing Inc has a BuildZoom score of 108, which places them above 95% of 336,931 contractors in California.
Activity
|
10 projects
|
2025 |
|
11 projects
|
2024 |
|
8 projects
|
2023 |
Our building permit records indicate that Chen's Plumbing Inc has worked on at least
29.0 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
|
4 projects
|
New Constructions |
|
23 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Chen's Plumbing Inc mostly works on
plumbing project
and new construction
projects.
Pricing
|
4 projects
|
< $5k |
|
3 projects
|
$5k-$20k |
|
5 projects
|
$20k-$50k |
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.
This pays for inspections related to original permit # pw20250416566 filed 4/16/2025. dow: work category: 2pa; install radiant heat for 2nd floor only
Valuation:
N/A
Permit #:
PW20250421678
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
As built for fire sprinkler work. ref fire sprinkler permit 202411195264 building permit 202503101889 original permit 201704043134
Valuation:
$1
Permit #:
202506239198
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Install fire sprinkler system for home per nfpa 13d using combo meter new 26 heads total. ref permits 202507231412 20210914834-s1
Valuation:
$30,000
Permit #:
202510076849
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Work category: 4pa; install fire sprinkler for adu
Valuation:
N/A
Permit #:
PW20250416566
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1p; install vent for water heater
Valuation:
N/A
Permit #:
PW20250117410
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 78 new sprinklers throughout per nfpa 13. install new wet stand pipe per nfpa 14. ba 202304145775
Valuation:
$48,445
Permit #:
202409100448
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
To obtain final inspection for sprinkler/underground work approved under pa# 2020-0901-3191. all work is complete
Valuation:
$1
Permit #:
202402025168
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Install 21 new fire sprinlkers throughout g/f only per nfpa13 u/g per nfpa24. ref tenant improvement. pa202008121663.0
Valuation:
$19,000
Permit #:
202107295361
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Install (32) new sprinklers through out ground fl. per nfpa13 no underground work existing
Valuation:
N/A
Permit #:
PP20230327153
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 4pa; final inspection for fire sprinkler
Valuation:
N/A
Permit #:
PW20241205541
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install fire sprinkler for new adu per nfpa 13. 13 heads. new meter required. app 201704043134
Valuation:
$15,039
Permit #:
202411195264
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
18-28 turk murphy lane: install 77 sprinklers per nfpa #13 underground per nfpa #24 stand pipe per nfpa #14 ref pa 2016-1028-1361. maher n/a
Valuation:
$45,000
Permit #:
201911227981
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Work category: 2pa; rough in and install one toilet tub lav sink floor drain laundry sink down spout
Valuation:
N/A
Permit #:
PW20240707985
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Adjusted the layouts of unit #2 #4 and #6 from 1 bedroom to 2 bedrooms to accuratel reflect building layout
Valuation:
$1
Permit #:
202303274436
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Work category: 4pa; addition and extend sprinkler heads on existing sprinkler work. permit 202209061877
Valuation:
N/A
Permit #:
PW20221010597
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 2pa; replace kitchen sink and stove replace toilet lav sink and tub shower valve at unit b
Valuation:
N/A
Permit #:
PW20220407401
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 4pb; additional inspections for fire sprinkler work on application 201911227981. original plumbing permit pp20191122450
Valuation:
N/A
Permit #:
PW20210117884
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 2pa; replace kitchen sink and stove replace toilet lav sink and shower at unit a
Valuation:
N/A
Permit #:
PW20220407400
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 2pa; install radiant heat for first floor only for single family home
Valuation:
N/A
Permit #:
PW20240421231
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Relocate 4 existing upright fire sprinlers and remove 4 existing drops. ref tenant improvement. 202302091749
Valuation:
$4,469
Permit #:
202307192455
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
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Verified License
BuildZoom confirmed this contractor's license
Chen's Plumbing Inc License info
Verified License
| License # | 516866 |
| Status | Active |
| State | California |
| Type | Plumbing, Fire Protection, Boiler, Hot Water Heating And Steam Fitting |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Chen's Plumbing Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 973578 |
| Status | Active |
| State | California |
| Type | Plumbing, Fire Protection, Boiler, Hot Water Heating And Steam Fitting |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Chen's Plumbing Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 755550 |
| Status | Inactive |
| State | California |
| Type | Fire Protection, Plumbing, Boiler, Hot Water Heating And Steam Fitting |
- 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 Chen's Plumbing Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 665412 |
| Status | Inactive |
| State | California |
| Type | Fire Protection, Plumbing |
- 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 Chen's Plumbing Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
Bonded
| Bonded Agent | Suretec Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Everest National Insurance Company |
944
Permits
- Building permit records show that Chen's Plumbing Inc has worked on 944 permitted projects.
Chen's Plumbing Inc Employees
BW
Bonita Bet Wah Wong
Officer
HC
Humphrey Yong Hui Chen
Officer
JC
Justin Xing Sheng Chen
Officer
LC
Linddy Ying Kang Chen
Rmo / Ceo / Pres