Updated: Jan 29, 2026
Location and Projects
Address
7419 BELLAIRE AVE, North Hollywood, CA, 91605
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Kosy & Joon Plumber
Kosy & Joon Inc, 7419 Bellaire Ave, North Hollywood, CA (Employees: Kyong Ock Lee and Sang Yul Lee) holds a Fire Protection license according to the California license board.
Their BuildZoom score of 106 ranks in the top 7% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Kosy & Joon Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Kosy & Joon Inc Services
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Kosy & Joon Inc Contact Information
Phone Number: (818) 982-3250
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Address: 7419 BELLAIRE AVE, North Hollywood, CA 91605
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Kosy & Joon Inc North Hollywood
Quality
106
93rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Kosy & Joon Inc has a BuildZoom score of 106, which places them above 93% of 336,931 contractors in California.
Activity
|
20 projects
|
2025 |
|
12 projects
|
2024 |
|
8 projects
|
2023 |
Our building permit records indicate that Kosy & Joon Inc has worked on at least
40.0 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
|
9 projects
|
Commercial Renovations |
|
35 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Kosy & Joon Inc mostly works on
plumbing project
and commercial renovation
projects.
Pricing
|
1 project
|
$5k-$20k |
|
1 project
|
$50k-$100k |
|
1 project
|
$100k-$250k |
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.
Installation of new fire sprinkler system per nfpa-13d. connects to 1 domestic meter. no backflow prevention device
Valuation:
N/A
Permit #:
25043-10000-01884
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Rev 202404109670: fire sprinkler tenant improvement. per new layout under pa 202406275361
Valuation:
$19,254
Permit #:
202503242855
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
15 - retail sales
Work category: 4pb; plumbing fire sprinkler permit (to schedule inspections for hangers)
Valuation:
N/A
Permit #:
PW20250529591
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install a new nfpa 13d sprinkler system. 1-inch domestic water meter no backflow preventer
Valuation:
N/A
Permit #:
25043-10000-01886
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New fire sprinkler system per nfpa 13. includes standpipes 4 fire meter and 4 backflow device
Valuation:
N/A
Permit #:
23043-10000-04593
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Fire sprinkler tenant improvement. addition of sprinklers. (e) 4 fire meter with backflow device
Valuation:
N/A
Permit #:
25043-10000-03125
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Fire sprinkler tenant improvement. add/replace sprinklers
Valuation:
N/A
Permit #:
25043-20000-02527
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Installation of nfpa 13r sprinkler system. 1.5 domestic water meter and no bfp
Valuation:
N/A
Permit #:
25043-10000-02676
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Revision to approved plan to addition bracing calculation for 4 steel pipe to wood. plan check only
Valuation:
N/A
Permit #:
22043-10001-03810
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Plan check only. revision to previously approved plans. revised sprinkler layout and updated hydraulic calculations
Valuation:
N/A
Permit #:
24043-10001-02963
Status:
approved
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Plan check only. revision to 24043-10000-03532. change of water meter to 4 fire service no backflow preventer
Valuation:
N/A
Permit #:
24043-10001-03532
Status:
approved
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
1st and 2nd floors -- addition 59 fire sprinkler heads to existing system at church building remodel
Valuation:
$25,000
Permit #:
BS1902963
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
Commercial low gen
Fire sprinkler tenant improvement. addition relocate and replace heads
Valuation:
N/A
Permit #:
25043-20000-03551
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
New fire sprinkler system per nfpa 13d. 1 domestic usage water meter
Valuation:
N/A
Permit #:
23043-20000-00549
Status:
applied
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Ti: adding heads
Valuation:
N/A
Permit #:
25043-10000-02334
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Plan check for fire sprinkler system. this is a nfpa 13-d system. 2-inch water meter
Valuation:
N/A
Permit #:
24043-10000-02233
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Installation of nfpa 13d system. 1 domestic meter no backflow
Valuation:
N/A
Permit #:
25043-10000-01067
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Plan check only permit under 22043-10000-03809. addition of water curtain head
Valuation:
N/A
Permit #:
22043-10002-03809
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Nfpa 13r fire sprinkler system. 4 fire meter; no backflow preventer
Valuation:
N/A
Permit #:
24043-10000-03362
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New nfpa-13 system for a new 44 unit apartment. building. 5-story typev-a structure over 20, 512sf ground and basement type i-a parking garage. new 4 detector check and 4 backflow device. ( 12- hydraulic calculations)
Valuation:
N/A
Permit #:
17043-10000-02870
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Kosy & Joon Inc License info
Verified License
| License # | 788713 |
| Status | Active |
| State | California |
| Type | Fire Protection |
| Business Type | Corporation |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Kosy & Joon Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
106
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Wesco Insurance Company |
318
Permits
- Building permit records show that Kosy & Joon Inc has worked on 318 permitted projects.
Kosy & Joon Inc Employees
KL
Kyong Ock Lee
Officer
SL
Sang Yul Lee
Rmo / Ceo / Pres