Updated: Jun 01, 2026
Location and Projects
Address
18653 Ventura Blvd, Tarzana, CA, 91356
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Csi Plumbing
Csi Plumbing, 18653 Ventura Blvd, Tarzana, CA (Owned by: Carlos Jason Serafin) holds a Plumbing license and 3 other licenses according to the California license board.
Their BuildZoom score of 101 ranks in the top 12% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Csi Plumbing, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Csi Plumbing Services
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Csi Plumbing Contact Information
Phone Number: (818) 878-8588
Address: 18653 Ventura Blvd, Tarzana, CA 91356
Csi Plumbing Tarzana
Quality
101
88th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Csi Plumbing has a BuildZoom score of 101, which places them above 88% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
|
2 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Csi Plumbing has worked on at least
7.0 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
|
7 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Csi Plumbing mostly works on
plumbing project
projects.
Pricing
|
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.
Installation of duplex sump pump system
Valuation:
N/A
Permit #:
25042-10000-03217
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
(1) toilet (1) lav. sink (1) shower (1) kitchen sink (1) washing machine and gas to the dryer
Valuation:
N/A
Permit #:
23042-90000-09301
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Repair broken pipe & patch concrete. replace front door paving (like for like)
Valuation:
$10,000
Permit #:
BS2301289
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Commercial low gen
Install two sump pumps
Valuation:
N/A
Permit #:
25042-90000-08824
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to 22042-90000-19660 to correct job address to 1938 s bedford st
Valuation:
N/A
Permit #:
22042-40001-19660
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Install washing machine service sink and sewage ejection pit and pump
Valuation:
N/A
Permit #:
22042-90000-12708
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Repair broken pipe & patch concrete. replace front door paving (like for like)
Valuation:
$10,000
Permit #:
BS2301288
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Commercial low gen
New plumbing fixtures in the guest house pool house
Valuation:
N/A
Permit #:
22042-90000-06147
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Install 6 gas earthquake shut off valves
Valuation:
N/A
Permit #:
22042-90000-19660
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Additional fixtures
Valuation:
N/A
Permit #:
22042-90000-05248
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Install 1 washing machine 1 dryer 1 service sink 1 kitchen sink 1 bar sink 1 toilet and 1 lav sink
Valuation:
N/A
Permit #:
19042-90000-00580
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Install sink washer and shower valve
Valuation:
N/A
Permit #:
20042-90000-14094
Status:
expired
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Kitchen work r & r fixtures
Valuation:
N/A
Permit #:
20042-90000-10334
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New accessory structure -- new enclosed squash court studio accessory structure
Valuation:
$150,000
Permit #:
BS1801601
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
Single family res...
New gas line to bbq
Valuation:
N/A
Permit #:
20042-90000-13464
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Gas outlets
Valuation:
N/A
Permit #:
23042-90000-10985
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Plumbing
Valuation:
N/A
Permit #:
23042-90000-12586
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Run 2 gas lines to house pool heater and generator
Valuation:
N/A
Permit #:
1803200002
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New studio accessory structure
Valuation:
$100,000
Permit #:
BS1702689
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
Single family res...
Single family dwelling. new plumbing system: equipment and piping. plan check for potable water waste/vent rainwater subsurface drainage sump pump and sewage ejector
Valuation:
$250,000
Permit #:
15042-20000-00850
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Csi Plumbing Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Csi Plumbing License info
Verified License
| License # | 804312 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Csi Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1025407 |
| Status | Inactive |
| State | California |
| Type | Plumbing |
| 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.
Check this license's status for Csi Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1024044 |
| 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.
Check this license's status for Csi Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 634724 |
| Status | Inactive |
| State | California |
| Type | Plumbing |
| 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.
Check this license's status for Csi Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
101
BuildZoom Score
Bonded
| Bonded Agent | Wesco Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Everest Premier Insurance Company |
53
Permits
- Building permit records show that Csi Plumbing has worked on 53 permitted projects.
Background Check
- Verified
Csi Plumbing Employees
CS
Carlos Jason Serafin
Owner
ES
Edward Alexander Sias
Owner