Updated: May 19, 2026
Location and Projects
Address
1839 CASTLETON ROAD, Darlington, MD, 21034
Use our bidding system to
request a quote
A-one Contractors Construction
A-one Contractors, 1839 Castleton Rd, Darlington, MD (Owned by: Kathy Onufrak) holds a Home Improvement license according to the Maryland license board.
Their BuildZoom score of 96 ranks in the top 20% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring A-one Contractors, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
A-one Contractors Services
Start a project today:
A-one Contractors Contact Information
Address: 1839 CASTLETON ROAD, Darlington, MD 21034
Edit
Do you work for this business? Unlock this free profile to update company info and see who's viewing your profile.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Building (c) - improvement - interior fit up
2022-05-03
Selective demolition of non-bearing non-rated interior walls ceiling and finishes hvac ductwork plumbing fixtures and lighting switches. construct new interior partitions new toilet rooms new kitchen equipment and hoods new plumbing fixtures and equipment connections new lighting outlets switches and equipment connections and new interior vertical and horizontal finishes & furniture
Valuation:
$140,000
Permit #:
CIMP-25385-2021
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace panel and heavy up to 200 amps. kitchen renovation install 5 appliances 10 lights 5 smoke detectors and 2 circuits
Valuation:
N/A
Permit #:
36474-2022-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
10 recessed lights 5 lights 15 outlets washer and dryer
Valuation:
N/A
Permit #:
2009-2023-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
22 recessed lights 23 outlets 7 lights water heater heat pump and air conditioning
Valuation:
N/A
Permit #:
45698-2022-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
Install recessed lights switches smoke detectors and 3 appliances
Valuation:
N/A
Permit #:
24528-2022-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
Install 2 ceiling fans 7 recessed lights 1 light and 4 outlets
Valuation:
N/A
Permit #:
49879-2022-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
Heavy up to 200amps
Valuation:
N/A
Permit #:
36503-2022-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
Installation of 12 lights 9 outlets washer/dryer and 6 smoke detectors
Valuation:
N/A
Permit #:
29032-2022-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
Upgrade service to 200amps replace service entrance cable and meter box
Valuation:
N/A
Permit #:
8975-2022-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
Replace dryer wire furnace wire replace switches and outlets
Valuation:
N/A
Permit #:
9752-2022-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
Install electric to addtition/loft
Valuation:
$0
Permit #:
E02298411
Status:
Completed
Fee:
$110
Permit Type:
Addition
Building Type:
Single family dwe...
Install electrical fir interior work of bed bathroom to incl electrical for mini split
Valuation:
$0
Permit #:
E02315402
Status:
Active
Fee:
$80
Permit Type:
Alteration
Building Type:
Interior remodeli...
Renovate the kitchen
Valuation:
N/A
Permit #:
3131-2023-0
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential living
Install electric for redo of kitchen and electric to addition-add80 amp panel to 150 amp panel
Valuation:
$0
Permit #:
E02304991
Status:
Completed
Fee:
$110
Permit Type:
Addition
Building Type:
Single family dwe...
Commercial renovation (smile dental).
Valuation:
$185,000
Permit #:
CIMP-5662-2014
Status:
final
Fee:
N/A
Permit Type:
Interior Fit Up
Building Type:
N/A
Install 200 amp servcie panel
Valuation:
$0
Permit #:
E02322724
Status:
Active
Fee:
$110
Permit Type:
Addition
Building Type:
Single family dwe...
Replace 200 amp service euqip
Valuation:
$0
Permit #:
E02314135
Status:
Completed
Fee:
$50
Permit Type:
Replace
Building Type:
5 or more family
Install electric to remodel
Valuation:
$0
Permit #:
E02312656
Status:
Active
Fee:
$110
Permit Type:
Alteration
Building Type:
Interior remodeli...
Install electric for unattached garage 60 amp panel
Valuation:
$0
Permit #:
E02304992
Status:
Completed
Fee:
$110
Permit Type:
New
Building Type:
Single family dwe...
Install 200 amp service replacement
Valuation:
N/A
Permit #:
E02323036
Status:
complete
Fee:
$110
Permit Type:
Addition
Building Type:
Single family dwe...
Similar Contractors See more
139
BZ Score
$25K
Avg Project
-
Projects
138
BZ Score
$15K
Avg Project
-
Projects
137
BZ Score
$240K
Avg Project
-
Projects
A-one Contractors Reviews
BuildZoom hasn't received any reviews for A-one Contractors. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
A-one Contractors License info
Verified License
| License # | 105279 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for A-one Contractors at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
106
Permits
- Building permit records show that A-one Contractors has worked on 106 permitted projects.
A-one Contractors Employees
KO
Kathy Onufrak
Owner