Updated: Apr 25, 2026
Location and Projects
Address
2156 NEWPORT BLVD, Costa Mesa, CA, 92627
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Johnston & Koper Group Plumber
Johnston & Koper Group Inc, 2156 Newport Blvd, Costa Mesa, CA (Employee: Matthew Charles Johnston) holds a Plumbing, General Building license 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 Johnston & Koper Group Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Johnston & Koper Group Inc Services
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Johnston & Koper Group Inc Contact Information
Phone Number: (949) 775-4682
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Address: 2156 NEWPORT BLVD, Costa Mesa, CA 92627
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Johnston & Koper Group Inc Costa Mesa
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Johnston & Koper Group Inc has a BuildZoom score of 108, which places them above 95% of 336,931 contractors in California.
Activity
|
1751 projects
|
2025 |
|
58 projects
|
2024 |
|
2 projects
|
2023 |
Our building permit records indicate that Johnston & Koper Group Inc has worked on at least
1811.0 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
|
1802 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Johnston & Koper Group Inc mostly works on
plumbing project
projects.
Pricing
|
2 projects
|
< $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.
Building Permits by Johnston & Koper Group Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Whtr-01: residential water heater replace/changeout | additional details: 100 pendio murano - 134 irvine ca 92620
Valuation:
N/A
Permit #:
00955505-WHTR
Status:
final
Fee:
$57
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: 100 grand canal 1013 irvine ca 92620
Valuation:
N/A
Permit #:
00956081-WHTR
Status:
final
Fee:
$57
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: - *permit reprinted to reflect the correct address* wm 09/05/25
Valuation:
N/A
Permit #:
00964497-WHTR
Status:
final
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969520-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969517-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969516-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969515-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969514-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969513-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969512-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969509-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969508-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969507-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969505-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969503-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969502-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969501-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969498-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969467-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
Whtr-01: residential water heater replace/changeout | additional details: -
Valuation:
N/A
Permit #:
00969465-WHTR
Status:
issued
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
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Johnston & Koper Group Inc Reviews
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Verified License
BuildZoom confirmed this contractor's license
Johnston & Koper Group Inc License info
Verified License
| License # | 1050311 |
| Status | Active |
| State | California |
| Type | Plumbing, General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Johnston & Koper Group 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 | Great American Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Farmers Insurance Exchange |
1.8K
Permits
- Building permit records show that Johnston & Koper Group Inc has worked on 1808 permitted projects.
Johnston & Koper Group Inc Employees
MJ
Matthew Charles Johnston
Ceo / President