Updated: May 28, 2026
Location and Projects
Address
8972 WHIRLAWAY CT, Alta Loma, CA, 91737
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Maddox Electric
Maddox Electric, 8972 Whirlaway Ct, Alta Loma, CA (Owned by: Maddox K C) holds a Electrical license and 4 other licenses according to the California license board.
Their BuildZoom score of 104 ranks in the top 9% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Maddox Electric, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Maddox Electric Contact Information
Phone Number: (909) 917-7074
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Address: 8972 WHIRLAWAY CT, Alta Loma, CA 91737
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Maddox Electric Alta Loma
Quality
104
91st percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Maddox Electric has a BuildZoom score of 104, which places them above 91% of 336,931 contractors in California.
Activity
|
5 projects
|
2025 |
|
4 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Maddox Electric has worked on at least
12.0 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 |
|
5 projects
|
Electrical projects |
Analyzing permits over the last 4 years shows that Maddox Electric mostly works on
electrical project
and home addition
projects.
Pricing
|
1 project
|
$100k-$250k |
|
1 project
|
$250k-$500k |
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.
Full plan check for tenant improvement. scope of work includes adding a 600a 208/120y 3p 4w section to existing single line diagram with a new 225kva transformer 208-480/277v to new distribution panel 600a 277/480v 3p 4w. comply with department order effective date 05/30/2024. permit will expire 30 days from issuance date ***building work description 24016-10000-27075*** change of use... see more
Valuation:
N/A
Permit #:
24041-10000-44843
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Construct (n) 684 sqft and 795 sqft 2nd-story attached (2) bedroom (2) bathroom adu above (e) garages (n) 262 sqft attached uncovered balcony mechanical electrical and plumbing under separate permits as per approved plans
Valuation:
$311,500
Permit #:
BLDR-2022-1034
Status:
complete
Fee:
$4,265
Permit Type:
N/A
Building Type:
N/A
Construct (n) 1, 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu above (e) garage (n) 117 sqft attached balcony mechanical electrical and plumbing under separate permits as per approved plans
Valuation:
$250,000
Permit #:
BLDR-2022-0966
Status:
complete
Fee:
$3,548
Permit Type:
N/A
Building Type:
N/A
Construct (n) 1, 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu above (e) garage (n) 117 sqft attached balcony mechanical electrical and plumbing under separate permits as per approved plans
Valuation:
$250,000
Permit #:
BLDR-2022-0965
Status:
complete
Fee:
$3,726
Permit Type:
N/A
Building Type:
N/A
Delta 4 revision & add'l scope: revise window @ dining room. addition (65) sf) entry. rebuild deck (369 sf). replace doors @ lower level
Valuation:
$196,800
Permit #:
REV2022-1565
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single family residence addition 12 sf to bathroom/remodel kitchen bathroom #2 laundry room and office of 818 sf; doors windows
Valuation:
$120,000
Permit #:
XR2022-2181
Status:
expired
Fee:
$3,440
Permit Type:
N/A
Building Type:
N/A
Residential supplemental fees - construct (n) 684 sqft and 795 sqft 2nd-story attached (2) bedroom (2) bathroom adu above (e) garages sanitation fee 1 479 sqft x $2.234 = $3 304.09
Valuation:
N/A
Permit #:
MIS-2022-0856
Status:
complete
Fee:
$3,304
Permit Type:
N/A
Building Type:
N/A
Single family residence interior remodel 2460 sf
Valuation:
$250,000
Permit #:
X2022-0813
Status:
issued
Fee:
$2,845
Permit Type:
N/A
Building Type:
N/A
Plumbing for (n) 1, 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu includes: (2) tub/shower (2) lavs (2) water closet (1) floor sink ref: bldr-2022-0966
Valuation:
N/A
Permit #:
PLMR-2022-0396
Status:
expired
Fee:
$290
Permit Type:
N/A
Building Type:
N/A
Plumbing for (n) 1, 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu includes: (2) tub/shower (2) lavs (2) water closet (1) floor sink ref: bldr-2022-0965
Valuation:
N/A
Permit #:
PLMR-2022-0395
Status:
expired
Fee:
$290
Permit Type:
N/A
Building Type:
N/A
Delta 7 revision: change roof insulation from r30 to r22
Valuation:
$196,800
Permit #:
REV2022-2189
Status:
applied
Fee:
$73
Permit Type:
N/A
Building Type:
N/A
Residential supplemental fees - construct (n) 1 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu sanitation fee 1 006 sqft x $2.234 = $2 247.04
Valuation:
N/A
Permit #:
MIS-2022-0774
Status:
complete
Fee:
$2,247
Permit Type:
N/A
Building Type:
N/A
Residential supplemental fees - construct (n) 1 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu sanitation fee 1 006 sqft x $2.234 = $2 247.04
Valuation:
N/A
Permit #:
MIS-2022-0773
Status:
complete
Fee:
$2,247
Permit Type:
N/A
Building Type:
N/A
Electrical for (n) 1, 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu includes: (25) outlets (15) switches (5) fixtures ref: bldr-2022-0966
Valuation:
N/A
Permit #:
ELER-2022-0698
Status:
expired
Fee:
$274
Permit Type:
N/A
Building Type:
N/A
Electrical for (n) 1, 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu includes: (25) outlets (15) switches (5) fixtures ref: bldr-2022-0965
Valuation:
N/A
Permit #:
ELER-2022-0697
Status:
expired
Fee:
$274
Permit Type:
N/A
Building Type:
N/A
Delta 4 revision & add'l scope: revise window @ dining room. addition (65) sf) entry. rebuild deck (369 sf). replace doors @ lower level
Valuation:
$21,478
Permit #:
XR2022-2395
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Mechanical for (n) 1, 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu includes: (3) exhaust fans (1) mini-split ref: bldr-2022-0966
Valuation:
N/A
Permit #:
MECR-2022-0170
Status:
expired
Fee:
$306
Permit Type:
N/A
Building Type:
N/A
Mechanical for (n) 1, 006 sqft 2nd-story attached (2) bedroom (2) bathroom adu includes: (3) exhaust fans (1) mini-split ref: bldr-2022-0965
Valuation:
N/A
Permit #:
MECR-2022-0169
Status:
expired
Fee:
$306
Permit Type:
N/A
Building Type:
N/A
Single family residence addition 12 sf to bathroom/remodel kitchen bathroom #2 laundry room and office of 818 sf; doors windows
Valuation:
N/A
Permit #:
PC2022-2022
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single family residence interior remodel 2460 sf
Valuation:
$196,800
Permit #:
0738-2022
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Maddox Electric License info
Verified License
| License # | 809446 |
| Status | Active |
| State | California |
| Type | Electrical |
| Business Type | Sole Proprietorship |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Maddox Electric at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 977838 |
| Status | Active |
| State | California |
| Type | Electrical |
| Business Type | Sole Proprietorship |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Maddox 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 # | 817890 |
| Status | Inactive |
| State | California |
| Type | Electrical |
| Business Type | Sole Proprietorship |
- 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 Maddox 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 # | 517458 |
| Status | Inactive |
| State | California |
| Type | Electrical |
| Business Type | Sole Proprietorship |
- 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 Maddox 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 # | 176383 |
| Status | Inactive |
| State | Arizona |
| Type | Electrical |
| Class | Commercial |
| Business Type | Sole Proprietorship |
- According to the Arizona Registrar of Contractors, 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 Maddox Electric at the Arizona Registrar of Contractors.
This is a sample of licensing data; click here to access a complete history.
104
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $12,500 |
Insured
| Workers Comp Provider | Mid Century Insurance Company |
132
Permits
- Building permit records show that Maddox Electric has worked on 132 permitted projects.
Maddox Electric Employees
JN
James Edward Nagel
Rme
KM
K C Maddox
Rmo/Ceo/Pres
KC
Ken David Cloud
Rme
LN
Linda Jean Nagel
Officer
MC
Maddox K C
Owner
MM
Mark David Maddox
Sole Owner
PN
Paul Morris Nagel
Officer