Updated: Nov 15, 2025
Location and Projects
Address
19718 ROSCOE BLVD, Winnetka, CA, 91306
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J&J Construction
J&J Construction, 19718 Roscoe Blvd, Winnetka, CA (Owned by: Kil Sun Park) holds a General Building license and 5 other licenses according to the California license board.
Their BuildZoom score of 98 ranks in the top 16% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring J&J Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
J&J Construction Services
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J&J Construction Contact Information
Phone Number: (310) 234-2678
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Address: 19718 ROSCOE BLVD, Winnetka, CA 91306
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J&J Construction Winnetka
Quality
98
84th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
J&J Construction has a BuildZoom score of 98, which places them above 84% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
2 projects
|
2023 |
Our building permit records indicate that J&J Construction has worked on at least
3.0 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
|
< $5k |
|
1 project
|
$5k-$20k |
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.
Water heater relocation to original location. relocating gas for new heater instalation
Valuation:
N/A
Permit #:
19042-10000-08579
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Service upgrade to 200 amp 2 gang meter. replace existing panels with new circuits
Valuation:
N/A
Permit #:
19041-10000-06528
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to 19042-10000-21072 to addition relocation of (2) water heaters
Valuation:
N/A
Permit #:
19042-10001-21072
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Replace and complete re-pipe plumbing fixtures in existing duplex
Valuation:
N/A
Permit #:
19042-10000-04121
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Water supply re-pipe
Valuation:
N/A
Permit #:
19042-10000-21073
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Install new gas heater
Valuation:
N/A
Permit #:
19044-10000-04339
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Water supply re-pipe
Valuation:
N/A
Permit #:
19042-10000-21072
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Install 3 water heaters
Valuation:
N/A
Permit #:
19042-10000-25450
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Change light fixture
Valuation:
N/A
Permit #:
19041-10000-41733
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Water supply re-pipe
Valuation:
N/A
Permit #:
19042-10000-21075
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Water supply re-pipe
Valuation:
N/A
Permit #:
19042-10000-21077
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
19042-10001-08579
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
***gpi and posting only*** convert existing crawl space to habitable rooms from existing 2 story to new 3 story; construct new retaining wall on grade beams and piles for building support
Valuation:
N/A
Permit #:
16030-10000-05943
Status:
complete
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Addition story to existing 2-story dwelling by converting existing crawl space to habitable rooms. construct new foundation for building support
Valuation:
$250,000
Permit #:
16014-10000-03916
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Greater north park - combination building permit for a bathroom addition and expand existing kitchen; & interior remodel to convert existing 1 car garage to loundry area & storage area with 3/4 bathroom to an existing single family residence zone: rs-1-7 faa part 77 notification area
Valuation:
$42,028
Permit #:
784926
Status:
complete
Fee:
N/A
Permit Type:
Add/alt 1 or 2 fa...
Building Type:
N/A
Linda vista. combination building permit for new 3rd story addition to existing 2-story single dwelling unit. zone is rs-1-7 parking impact geologic hazard catgeory 52
Valuation:
$122,907
Permit #:
271299
Status:
complete
Fee:
$2,628
Permit Type:
Add/alt 1 or 2 fa...
Building Type:
N/A
Grading for conversion of crawl space to habitable story at existing 2-story single family dwelling
Valuation:
$49
Permit #:
16030-10000-05942
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Tenant improvement work for cafe patio (northern 19'x46'-6 portion) -non bearing wall and interior wall finish to enclose the existing outdoor area into indoor seating area. no cooking or baking allowed. work is to comply with department order
Valuation:
N/A
Permit #:
04016-10000-11641
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Mission valley . mvpd-mv-cr/95-0579 . building permit for tenant improvement to existing retail space. scope of work includes demolish new interior partitions electrical and no plumbing work. separate misc. permit is required for electrical
Valuation:
$2,900
Permit #:
599738
Status:
complete
Fee:
$1,383
Permit Type:
Add/alt tenant im...
Building Type:
N/A
Mission valley . mvpd-mv-cr/95-0579 . building permit for tenant improvement to existing retail space. scope of work includes demolish new interior partitions electrical and no plumbing work. separate misc. permit is required for electrical
Valuation:
N/A
Permit #:
599758
Status:
complete
Fee:
$351
Permit Type:
Add/alt tenant im...
Building Type:
N/A
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J&J Construction Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
J&J Construction License info
Verified License
| License # | 864482 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of October 2025.
Verify this license's status for J&J Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 797634 |
| 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 J&J Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 794703 |
| 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 J&J Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 662796 |
| 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 J&J Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 613793 |
| 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 J&J Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1016722 |
| 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 J&J Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
114
Permits
- Building permit records show that J&J Construction has worked on 114 permitted projects.
J&J Construction Employees
JJ
James Alexander Jones
Sole Owner
JJ
Jay Steven Jovanovich
Sole Owner
JS
John Sarkisian
Qualify Partner
JS
John Manuel Serrato
Sole Owner
JC
Jorge Meraz Caballero
General Partner
JC
Jorge Meraz Caballero
General Partner
JM
Juan Meraz
Qualify Partner
JM
Juan Meraz
Qualify Partner
KP
Kil Sun Park
Sole Owner
KP
Kil Sun Park
Owner