Updated: May 02, 2026
Location and Projects
Address
2300 WALNUT AVE SUITE G, Signal Hill, CA, 90755
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Cal Coast Plumbing
Cal Coast Plumbing, 2300 Walnut Ave, Signal Hill, CA (Employees: Calvin George Miller Iii, Calvin George Miller Jr, and Keith John Souter) holds a Plumbing license and 1 other license according to the California license board.
Their BuildZoom score of 102 ranks in the top 11% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Cal Coast Plumbing, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Cal Coast Plumbing Services
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Cal Coast Plumbing Contact Information
Phone Number: (714) 606-2629
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Address: 2300 WALNUT AVE SUITE G, Signal Hill, CA 90755
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Cal Coast Plumbing Signal Hill
Quality
102
89th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Cal Coast Plumbing has a BuildZoom score of 102, which places them above 89% of 336,931 contractors in California.
Activity
|
4 projects
|
2025 |
|
1 project
|
2024 |
|
4 projects
|
2023 |
Our building permit records indicate that Cal Coast Plumbing has worked on at least
9.0 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
|
5 projects
|
Commercial Renovations |
|
9 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Cal Coast Plumbing mostly works on
plumbing project
and commercial renovation
projects.
Pricing
|
1 project
|
< $5k |
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.
Supplemental to permit# 23042-40000-09314 to addition -1 grease trap. comply with department order effective date 06/15/2020. permit will expire 30 days from issuance date
Valuation:
N/A
Permit #:
23042-10001-09314
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Supplemental to permit#25042-90000-10936 to addition the following: (2) water outlets
Valuation:
N/A
Permit #:
25042-20001-10936
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Replace breakroom sink
Valuation:
N/A
Permit #:
25042-90000-10936
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Tenant improvement
Valuation:
N/A
Permit #:
25042-90000-06900
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Replace 78 temperature setting valves to hot water return system feeding aparatments
Valuation:
N/A
Permit #:
22042-10000-05207
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Ten imp: calcom federal credit union - renovate space with new walls doors ceilings. install new (1) toilet (1) lavatory (1) kitchen sink. replace sewer line install (1) clean out at front of business
Valuation:
$160,000
Permit #:
PLM18-01039
Status:
complete
Fee:
$124
Permit Type:
N/A
Building Type:
N/A
(e-plan) luxe hotel--interior remodel--changeout penthouse doors
Valuation:
$1,250,000
Permit #:
BS1902321
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Commercial low gen
Supplemental permit to collect fees for (10) additional inspection. this permit does not authorize any additional work or extend the expiration date of the original permit
Valuation:
N/A
Permit #:
14042-10001-18655
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Relocate existing toilet lavatory and break room sink
Valuation:
N/A
Permit #:
22042-90000-06580
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Plan check for the installation of balancing valves hot and cold water isolation valves at each riser and replace 2 re-circulation water line to 2-1/2
Valuation:
N/A
Permit #:
14042-10000-18655
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Tenant improvement. rough-in sanitary waste vent water to new fixtures
Valuation:
N/A
Permit #:
23042-90000-01613
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Yoga studio tenant improvement
Valuation:
N/A
Permit #:
25042-30000-12290
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
(e-plan) remove and replace 1- toilet 1- lavatory like for like
Valuation:
$2,000
Permit #:
PLM-2024-00430
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install break room sink
Valuation:
N/A
Permit #:
22042-90000-09841
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Install new drinking fountain in fitness area
Valuation:
N/A
Permit #:
21042-10000-07573
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Install 2 new restrooms and 1 breakroom sink
Valuation:
N/A
Permit #:
21042-90000-03164
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Tenant improvement
Valuation:
N/A
Permit #:
22042-90000-22637
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Re-routing existing plumbing lines sink and dishwasher
Valuation:
N/A
Permit #:
20042-90000-13319
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Addition new break room sink
Valuation:
N/A
Permit #:
20042-90000-00463
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Extension of two sewer lines to new tenant spaces
Valuation:
N/A
Permit #:
19042-90000-14364
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
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Cal Coast Plumbing Reviews
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Verified License
BuildZoom confirmed this contractor's license
Cal Coast Plumbing License info
Verified License
| License # | 493848 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Corporation, Sole Ownership |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Cal Coast Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 298799 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Corporation, Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Cal Coast Plumbing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
102
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Insurance Company Of The West |
615
Permits
- Building permit records show that Cal Coast Plumbing has worked on 615 permitted projects.
Cal Coast Plumbing Employees
CI
Calvin George Miller Iii
Officer
CJ
Calvin George Miller Jr
Rmo/Ceo/Pres
KS
Keith John Souter
Sole Owner