Updated: May 27, 2026
Location and Projects
Address
Gaithersburg, MD, 20877
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William Castillo Electrician
William Castillo, Gaithersburg, MD holds a Electricians license according to the Maryland license board.
Their BuildZoom score of 0 does not rank in the top 50% of Maryland contractors.
Their license was verified as active when we last checked. If you are thinking of hiring William Castillo, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
William Castillo Contact Information
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William Castillo Gaithersburg
Quality
Alert*
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
*No active license on file. If you are William Castillo, click “This is My Business” to update your information.
Activity
|
1 project
|
2025 |
|
15 projects
|
2024 |
|
18 projects
|
2023 |
Our building permit records indicate that William Castillo has worked on at least
34.0 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
|
34 projects
|
Electrical projects |
Analyzing permits over the last 4 years shows that William Castillo mostly works on
electrical project
projects.
Pricing
|
25 projects
|
< $5k |
|
7 projects
|
$5k-$20k |
The typical size of their permits is approximately $3,200. 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.
Existing service entrance cable was damaged. we are replacing the service entrance cable only
Valuation:
$1,500
Permit #:
ELEC-30430-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Request for electrical permit to install (1) 240v circuit for ev charger and trenching
Valuation:
$3,500
Permit #:
ELEC-29803-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical - (r) add/alt - with service change
2023-02-09
Request for electrical permit to upgrade existing amparage to 200 amp uderground
Valuation:
$3,500
Permit #:
ELEC-30093-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Request for electrical permit to install (1) 240v dedicated circuit for ev charger
Valuation:
$1,032
Permit #:
ELEC-29514-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Request for electrical permit to install (1) 240v dedicated circuit for ev charger
Valuation:
$696
Permit #:
ELEC-29512-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing main panel 200 amp existing 200 amp replacement
Valuation:
$3,900
Permit #:
ELEC-28565-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 240 volt dedicated circuit for ev charger
Valuation:
$758
Permit #:
ELEC-30284-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Requesting a permit to install 400 amp heavy up and install an ev 240v circuit in garage
Valuation:
$6,000
Permit #:
ELEC-32286-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Request for electrical permit to 240v dedicated circuit for ev charger
Valuation:
$900
Permit #:
ELEC-29481-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Request for electrical permit to replace main existing 200 amp panel
Valuation:
$2,000
Permit #:
ELEC-28898-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install (2) speaker cables (10) data cables and (2) security cameras
Valuation:
$4,500
Permit #:
ELEC-28855-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Request for electrical permit to 240v dedicated curcuit ev charger
Valuation:
$1,100
Permit #:
ELEC-27388-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 240v circuit for ev charger
Valuation:
$900
Permit #:
ELEC-30525-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical - (r) add/alt - no service change
2023-04-04
240v dedicated circuit for ev charger
Valuation:
$1,500
Permit #:
ELEC-30427-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical - (r) add/alt - no service change
2023-04-05
Install 240v circuit for ev charger
Valuation:
$742
Permit #:
ELEC-30393-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
400 amp heavy up trench from service to detached garage
Valuation:
$7,815
Permit #:
ELEC-32729-2024
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Request for permit to; install a 200 amp underground heavy up
Valuation:
$3,788
Permit #:
ELEC-32378-2024
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing 200 amp panel
Valuation:
$3,200
Permit #:
ELEC-30392-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Request for electrical permit to replace 200 amp panel
Valuation:
$3,500
Permit #:
ELEC-28034-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical - (r) add/alt - with service change
2023-04-27
Replacing 100 amp sub panel
Valuation:
$2,200
Permit #:
ELEC-30624-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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William Castillo Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
William Castillo License info
Verified License
| License # | 12209 |
| Status | Active |
| State | Maryland |
| Type | Electricians |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for William Castillo at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
- How the BuildZoom Score works
- *No active license on file. If you are William Castillo, click “This is My Business” to update your information.
136
Permits
- Building permit records show that William Castillo has worked on 136 permitted projects.
William Castillo Employees
WC
William Castillo
Owner