Updated: May 29, 2026
Location and Projects
Address
P O BOX 1045, San Mateo, CA, 94403
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Alex Tong Electrician
Alex Tong Electrician, San, Po Box 1045, San Mateo, CA (Employees: Alex Siuming Tong and Clara Sauming Ko) holds a Electrical, General Building license according to the California license board.
Their BuildZoom score of 115 ranks in the top 2% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Alex Tong Electrician, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Alex Tong Electrician Contact Information
Phone Number: (650) 245-8879
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Address: P O BOX 1045, San Mateo, CA 94403
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Alex Tong Electrician San Mateo
Quality
115
98th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Alex Tong Electrician has a BuildZoom score of 115, which places them above 98% of 336,931 contractors in California.
Activity
|
9 projects
|
2025 |
|
23 projects
|
2024 |
|
19 projects
|
2023 |
Our building permit records indicate that Alex Tong Electrician has worked on at least
51.0 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
|
4 projects
|
Home Additions |
|
47 projects
|
Electrical projects |
Analyzing permits over the last 4 years shows that Alex Tong Electrician mostly works on
electrical project
and home addition
projects.
Pricing
|
23 projects
|
< $5k |
|
13 projects
|
$5k-$20k |
|
3 projects
|
$20k-$50k |
|
1 project
|
$50k-$100k |
|
1 project
|
$100k-$250k |
The typical size of their permits is approximately $4,500. 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.
Building Permits by Alex Tong Electrician
This is a sample of this contractor's permits. Click here to access their complete permit history.
Single family dwelling interior remodel of 590sf to 1st and 2nd floor. 1st flr: new laundry closet in hallway remodel/enlarge kitchen remodel powder room and close up one of two door openings remodel hallway bathroom and convert in private bathroom to a bedroom. 2nd floor: convert two existing bedrooms into one master suite and remodel hallway bathroom
Valuation:
$130,402
Permit #:
BD-2023-289117
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1) replace knob-and-tube wires with romex for 3 bedrooms living room dining area family room 2 bathrooms and kitchen 2) upgrade main panel to 200a 3) replace 100a sub-panel in garage (same location) 4) install 18 led recessed light fixtures in the house
Valuation:
N/A
Permit #:
BLD2023-01477
Status:
final
Fee:
$587
Permit Type:
N/A
Building Type:
N/A
1) replace old knob-and-tube wires with romex for 4 bedrooms living room family room 3 bathrooms and kitchen 2) replace 100a subpanel 3) upgrade main panel to 200a 4) install 65 led recessed light fixtures throughout the house
Valuation:
N/A
Permit #:
BLD2023-01306
Status:
final
Fee:
$422
Permit Type:
N/A
Building Type:
N/A
1) replace existing knob-and-tube wires with romex wires for 2 bedrooms living room dining area and bathroom 2) install 4 recessed light fixtures in living room 3) install recessed light fixture for 2 bedroom closet
Valuation:
N/A
Permit #:
BLD2024-00813
Status:
final
Fee:
$239
Permit Type:
N/A
Building Type:
N/A
1) rewire- replace knob-and-tube wires with romex for 3 bedrooms living and family rooms kitchen 3 bathrooms and dining area. 2) install 100a indoor sub-panel in garage. 3) upgrade existing main panel to 200a from front of the house to the left side
Valuation:
$25,000
Permit #:
MEP-2023-291250
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1) replace knob-and-tube wires with romex for 3 bedrooms living room dining room kitchen and bathroom. 2) relocate 100a subpanel from closet to hallway 3) upgrade main panel to 200a.- exterior right of house when you are planning an electrical panel replacement and electrical panel upgrade the city requires the electrical panel to include panel capacity and breaker space for future el... see more
Valuation:
$15,000
Permit #:
MEP-2023-291672
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel remove interior walls replace cabinetry finishes fixtures appliances and addition skylight demolish bathroom and addition laundry room. (390 sq.ft)
Valuation:
$86,198
Permit #:
BD-2022-287180
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing knob-and-tube wires with romex for 2 bedrooms living room dining room and kitchen. install 18 led recessed light fixtures in living room (6) 2 bedrooms (4 each) and 1 each in hallway dining room kitchen 3rd bedroom. replace indoor sub-panel (like for like same location)
Valuation:
$15,000
Permit #:
MEP-2022-286139
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical work consisting of: replace existing knob-and-tube wires with romex wires for 3 bedrooms 3 bathrooms living room family room dining area and kitchen ; upgrade main panel from 100a to 200a ; replace 100a sub-panel within hallway; install 13 led recessed light fixtures; *** all work on first floor only (no work on second floor)***
Valuation:
$15,000
Permit #:
MEP-2022-284499
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single family residential alteration to upgrade main panel to 200a replace knob-and-tube wires with romex for 3 bedrooms living dining and family rooms replace indoor 100a sub-panel and install 9 led recessed light fixtures in living room
Valuation:
$18,000
Permit #:
BLD2022-02840
Status:
complete
Fee:
$698
Permit Type:
Repair
Building Type:
N/A
Single family residential alteration to upgrade main panel to 200a replace knob-and-tube wires with romex for 3 bedrooms living dining and family rooms replace indoor 100a sub-panel and install 9 led recessed light fixtures in living room
Valuation:
$18,000
Permit #:
BPA2022-02571
Status:
filed
Fee:
N/A
Permit Type:
Repair
Building Type:
N/A
1) replace existing knob-and-tube wires with romex wires for 3 bedrooms 2 bathrooms living room dining room and kitchen. 2) install 6 led recessed lights in living room. 3) install new 100a sub-panel in hallway. 4) install new 200a main panel
Valuation:
$18,000
Permit #:
MEP-2021-283200
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1) replace existing knob-and-tube wires with romex wires for 2 bedrooms living room bathroom dining area and kitchen. 2) install 6 led recessed light fixtures in living room
Valuation:
$15,000
Permit #:
MEP-2023-288971
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1) replace knob-and-tube wires with romex for 3 bedrooms living room dining room bathroom and kitchen. 2) upgrade main panel to 200a (same location) left hand side outside
Valuation:
$15,000
Permit #:
MEP-2023-289107
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
A single family residence to install 3 recessed light fixtures in dining area a 60a subpanel 30a disconnect 40a stove and dedicated circuits from existing 200a panel
Valuation:
$2,500
Permit #:
BLD2024-02080
Status:
final
Fee:
$570
Permit Type:
Addition
Building Type:
N/A
Upgrade electric service from from 100 amps to 200 amps 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 that ... see more
Valuation:
N/A
Permit #:
BLD2020-01216
Status:
final
Fee:
$159
Permit Type:
N/A
Building Type:
N/A
1) replace knob-and-tube wires with romex for 3 bedrooms 1 bathroom living room dining area and kitchen. 2) install 100a sub-panel. 3) upgrade main panel from 100a to 200a
Valuation:
$15,000
Permit #:
MEP-2022-283426
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1) replace knob-and-tube for 3 bedrooms office and family room. 2) upgrade main panel from 100 a to 200a (same location). revision #1: please add: install 240v 50a ev fast charging station at the left side of the house (exterior). (issued 04/18/24)
Valuation:
$15,000
Permit #:
MEP-2024-292946
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1) replace knob-and-tube wires with romex for 3 bedrooms living room dining room family room kitchen and 2 bathrooms. 2) upgrade 100a to 200a main panel. 3) install 3 windows like for like in the same location and same size at the kitchen. 4) install 25 recessed lights throughout house. 5) kitchen remodel with no wall alteration
Valuation:
$35,000
Permit #:
BD-2020-276710
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace 200a main panel with new 200a main panel at same location (left side exterior wall of dwelling)
Valuation:
$4,000
Permit #:
MEP-2023-287922
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Alex Tong Electrician License info
Verified License
| License # | 836233 |
| Status | Active |
| State | California |
| Type | Electrical, General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Alex Tong Electrician at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
115
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
236
Permits
- Building permit records show that Alex Tong Electrician has worked on 236 permitted projects.
Alex Tong Electrician Employees
AT
Alex Siuming Tong
Rmo / Ceo / Pres
CK
Clara Sauming Ko
Officer