Updated: Jun 18, 2026
Location and Projects
Address
1101 Sourth Railroad Avenue, San Mateo, CA, 94402
Use our bidding system to
request a quote
Thornton Electric
Thornton Electric, 1101 Sourth Railroad Ave, San Mateo, CA holds a Electrical license and 2 other licenses according to the California license board.
Their BuildZoom score of 120 ranks in the top 1% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Thornton Electric, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Thornton Electric Contact Information
Phone Number: (650) 349-3777
Address: 1101 Sourth Railroad Avenue, San Mateo, CA 94402
Thornton Electric San Mateo
Quality
120
99th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Thornton Electric has a BuildZoom score of 120, which places them above 99% of 336,931 contractors in California.
Activity
|
10 projects
|
2025 |
|
7 projects
|
2024 |
|
15 projects
|
2023 |
Our building permit records indicate that Thornton Electric has worked on at least
32.0 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
|
30 projects
|
Electrical projects |
Analyzing permits over the last 4 years shows that Thornton Electric mostly works on
electrical project
projects.
Pricing
|
7 projects
|
< $5k |
|
9 projects
|
$5k-$20k |
|
2 projects
|
$20k-$50k |
|
2 projects
|
$50k-$100k |
The typical size of their permits is approximately $8,900. 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.
1. replace existing 200 amp over head fed meter main in same location due to age 2. replace and relocate fuse panel out of closet. new panel will be circuit breakers
Valuation:
N/A
Permit #:
BLD2025-00305
Status:
final
Fee:
$488
Permit Type:
N/A
Building Type:
N/A
Units #1-#6: replace (e) main service panel and upgrade from 100a to 200a in same location in unmarked carport; replace (6) 30a disconnects for each unit and (6) fuse panels inside each of 6 units revision #1: replace main disconnect replace (e) fuses with circuit breakers main panel disconnect to remain at 100a (issued 6/5/24) field revision: 6/6/2024 tn equipment change out only (e)... see more
Valuation:
$59,280
Permit #:
MEP-2024-292996
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 40 amp receptacle in the garage.for charing an electrical vehicle and other appliances
Valuation:
N/A
Permit #:
BLD2025-00610
Status:
final
Fee:
$271
Permit Type:
N/A
Building Type:
N/A
1. upgrade main electrical service to 200 amps over head same location 2.install 50 amp 120/240 volt receptacle in garage for future electric car 3. 4/11/22 per electrical contractor 50 amp receptacle removed from scope
Valuation:
N/A
Permit #:
BLD2022-00754
Status:
final
Fee:
$239
Permit Type:
N/A
Building Type:
N/A
Addition (8) lights in living room addition (2) switches in living room addition (1) 120 volt dedicated circuit in pantry. addition (1) receptacle in family room
Valuation:
$9,500
Permit #:
BIE23-006585
Status:
final
Fee:
$325
Permit Type:
N/A
Building Type:
N/A
Replace existing damaged 125 amp meter main panel in same location as existing
Valuation:
N/A
Permit #:
BLD-2025-34
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Upgrade (e) 60a main panel to 200a overhead feed relocate from rear exterior to side exterior :: revision-02/18/2022-ae - main panel to be changed out from (e) 100 amp to (n) 200 amp panel.-
Valuation:
$9,350
Permit #:
MEP-2022-283655
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Upgrade main service in same location from 100 amps to 200 amps overhead fed. install one 20 kw natural gas generator and transfer switch. (to be pulled as a separate permit) install one 50 amp 240 volt receptacle in garage
Valuation:
$49,000
Permit #:
MEP-2020-276832
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Multifamily. remove 6 (e) 50a federal pacific panels. 5 in apartment closets 1 in washing room. install (n) 50a panels outside of closets
Valuation:
$21,650
Permit #:
MEP-2024-295765
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Upgrade main panel from 100 amps to 200 amps in same location (rear of property). replace 100 amp subpanel in same location (garage)
Valuation:
$17,950
Permit #:
MEP-2024-294591
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical plumbing & mechanical - electrical vehicle charging station
2023-08-09
Single family residence - electrical vehicle (ev) charger outlet installation within the garage; 50 amp 120 -240 volt gfci
Valuation:
$3,500
Permit #:
MEP-2023-287923
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Whole house rewire (16) can lights (20) switches (5) smoke detectors (40) receptacles (3) 240-volt circuits (10) ceiling lights
Valuation:
$58,000
Permit #:
MEP-2022-286663
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing 200 amp meter main panel with like panel “it is the permittee’s obligation and responsibility to ensure that all work associated with this permit complies with all current orders of the health officer of the county of san mateo related to the novel coronavirus disease 2019 (covid-19). the county of san mateo assumes no responsibility for work performed by permittee th... see more
Valuation:
$6,500
Permit #:
BLD2020-01898
Status:
final
Fee:
$154
Permit Type:
N/A
Building Type:
N/A
Replace circuit breaker panel sub panel
Valuation:
$3,500
Permit #:
MEP2025-00257
Status:
final
Fee:
$272
Permit Type:
N/A
Building Type:
N/A
1. upgrade main electrical panel in same location to 200 amps over head fed 2. install one 50 amp 120/240 volt receptacle for car charger
Valuation:
N/A
Permit #:
BLD2022-00806
Status:
final
Fee:
$239
Permit Type:
N/A
Building Type:
N/A
Ce: rpl msp panel only 100a at same location see note
Valuation:
N/A
Permit #:
ELEC2024-0144
Status:
final
Fee:
$699
Permit Type:
Electrical servic...
Building Type:
N/A
Upgrade main service to 200amp same location. addition (2) led lights and (2) gfi receptacles in garage
Valuation:
$11,400
Permit #:
MEP-2024-293694
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install four 120 volt 20 amp circuits to kitchen. install one 120 volt 20 amp circuit to garage
Valuation:
$8,500
Permit #:
MEP-2024-295421
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing main electrical panel. new panel will be 100 amps in same location as existing
Valuation:
N/A
Permit #:
BLD-2024-1114
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Unit 109 and unit 111: upgrade main service to two 100 amp meter socket and main switch for each unit. replace two fuse panel with circuit breaker type panels in same location at exterior
Valuation:
$18,750
Permit #:
MEP-2020-277042
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Thornton Electric Reviews
BuildZoom hasn't received any reviews for Thornton Electric. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Thornton Electric License info
Verified License
| License # | 480158 |
| Status | Active |
| State | California |
| Type | Electrical |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Thornton Electric at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 480158 |
| Status | Inactive |
| City | Butte County |
| Type | Contractor |
| Business Type | Corporation |
- According to the Butte County, CA, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Thornton Electric at the Butte County, CA.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 480158 |
| Status | Inactive |
| City | South San Francisco |
| Type | Contractor |
| Business Type | Corporation |
- According to the The City of South San Francisco, CA, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Thornton Electric at the The City of South San Francisco, CA.
This is a sample of licensing data; click here to access a complete history.
120
BuildZoom Score
Insured
| Insurer | Zurich American Insurance Company |
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Starnet Insurance Company |
452
Permits
- Building permit records show that Thornton Electric has worked on 452 permitted projects.