Updated: May 21, 2026
Location and Projects
Address
1700 2ND STREET SUITE 370, Napa, CA, 94559
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Thern Electric Inc
Thern Electric Inc, 1700-2 Nd St, Napa, CA (Employees: Chesnutt Construction, Dave Alberto Whitten, and David Alberto Whitten) holds a Electrical license and 2 other licenses according to the California license board.
Their BuildZoom score of 109 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 Thern Electric Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Thern Electric Inc Contact Information
Phone Number: (707) 252-8572
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Address: 1700 2ND STREET SUITE 370, Napa, CA 94559
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Thern Electric Inc Napa
Quality
109
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Thern Electric Inc has a BuildZoom score of 109, which places them above 95% of 336,931 contractors in California.
Activity
|
9 projects
|
2025 |
|
5 projects
|
2024 |
|
7 projects
|
2023 |
Our building permit records indicate that Thern Electric Inc has worked on at least
21.0 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
|
20 projects
|
Electrical projects |
Analyzing permits over the last 4 years shows that Thern Electric Inc mostly works on
electrical project
projects.
Pricing
|
8 projects
|
< $5k |
|
4 projects
|
$5k-$20k |
|
1 project
|
$20k-$50k |
|
2 projects
|
$100k-$250k |
The typical size of their permits is approximately $5,950. This graph shows the distribution of these job values.
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.
***potential floodplain restrictions*** remove existing 200a 3ph 480v frost protection panel. install a new 200a 3ph 480v frost protection panel in its place. no added load
Valuation:
$6,900
Permit #:
S25-00847-COM
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Ground mount solar system. (when creating permit 59.40kw is the correct kw) 53.48 cc kwac with batteries
Valuation:
$226,200
Permit #:
S24-01301-RES
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Agricultural: remove existing 200a 3ph 480v frost protection panel. install a new 200a 3ph 480v frost protection panel in its place. no added load
Valuation:
$6,900
Permit #:
BC25-01058-ELC
Status:
final
Fee:
$332
Permit Type:
N/A
Building Type:
N/A
New ground mount solar 59.40kw and 350kwh energy storage system
Valuation:
$226,200
Permit #:
BR24-01658-AES
Status:
review to applicant
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical alteration: main panel upgrade like for like 100 amp (panel a)
Valuation:
$2,900
Permit #:
BC23-00322-ELC
Status:
final
Fee:
$290
Permit Type:
N/A
Building Type:
N/A
Upgrade electrical service from 200 amp to 400 amp new service to be installed on backboard approx. 100 from house
Valuation:
$5,000
Permit #:
BR23-01866-ELC
Status:
final
Fee:
$453
Permit Type:
N/A
Building Type:
N/A
Mpu 200a
Valuation:
$2,900
Permit #:
E2503-0063
Status:
final
Fee:
$281
Permit Type:
Upgrade
Building Type:
N/A
Electrical alteration- main dwelling- main panel upgrade remove existing 200 amp and install 320 amp
Valuation:
$6,900
Permit #:
BR23-02084-ELC
Status:
final
Fee:
$290
Permit Type:
N/A
Building Type:
N/A
Electrical alteration: new ev charger- (1) 100 amp 240 volt circuit for ford lightning charger
Valuation:
$2,500
Permit #:
BR23-01921-ELC
Status:
final
Fee:
$387
Permit Type:
N/A
Building Type:
N/A
Install a standby generator-48kw natural gas fueled to service the (e) ag service with automatic transfer switch to switch between normal power (pg&e) and backup power (generator) in an event of loss of power
Valuation:
$20,000
Permit #:
BR23-00441-AES
Status:
expired
Fee:
$898
Permit Type:
N/A
Building Type:
N/A
2020 glass fire - replace 200 amp panel damaged in the fire - evt20-00650
Valuation:
N/A
Permit #:
BLD21-0822
Status:
issued
Fee:
$118
Permit Type:
N/A
Building Type:
N/A
Main panel upgrade like for like 100 amp
Valuation:
$3,800
Permit #:
BC22-01741-ELC
Status:
final
Fee:
$184
Permit Type:
N/A
Building Type:
N/A
Install (1) 100 amp 240 volt circuit for ford lightning charger
Valuation:
$2,500
Permit #:
S23-01366-RES
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Roof mount solar on guest house: 5.5kw
Valuation:
$25,000
Permit #:
BR22-01301-AES
Status:
final
Fee:
$654
Permit Type:
N/A
Building Type:
N/A
100 amp backboard for well pumps
Valuation:
$6,500
Permit #:
BP_2022-0002
Status:
final
Fee:
$254
Permit Type:
Replace meter or ...
Building Type:
N/A
Main panel upgrade 200 amp
Valuation:
$5,000
Permit #:
BR23-00004-ELC
Status:
final
Fee:
$289
Permit Type:
N/A
Building Type:
N/A
Emergency generator: install (1) new 48kw generator and transfer switches
Valuation:
$20,000
Permit #:
BR22-01656-AES
Status:
final
Fee:
$837
Permit Type:
N/A
Building Type:
N/A
Generator propane tank and new sub panel - 30kw to service (e) ag service with ats
Valuation:
$20,000
Permit #:
BR22-01377-AES
Status:
final
Fee:
$1,105
Permit Type:
N/A
Building Type:
N/A
Mpu; 125a to 200a
Valuation:
$4,750
Permit #:
E2509-0078
Status:
issued
Fee:
$281
Permit Type:
N/A
Building Type:
N/A
Main panel upgrade - ok 200 amp main and 400 amp ag
Valuation:
$30,000
Permit #:
BR22-01740-ELC
Status:
final
Fee:
$290
Permit Type:
N/A
Building Type:
N/A
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Thern Electric Inc Reviews
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Verified License
BuildZoom confirmed this contractor's license
Thern Electric Inc License info
Verified License
| License # | 831007 |
| Status | Active |
| State | California |
| Type | Electrical |
| Business Type | Corporation |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Thern Electric Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 400056 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- 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 Thern Electric Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 365236 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- 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 Thern Electric Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
109
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
133
Permits
- Building permit records show that Thern Electric Inc has worked on 133 permitted projects.
Thern Electric Inc Employees
CC
Chesnutt Construction
Entity
DW
Dave Alberto Whitten
Rmo
DW
David Alberto Whitten
Officer
HT
Hans Thern
Sole Owner
HT
Hans Thern
Sole Owner
HH
Heather Lee Hood
Officer
LS
Leslie Stewart
Officer
TH
Thern H
Entity