Updated: Apr 19, 2026
Location and Projects
Address
10009 PUTMAN RD, Frederick, MD, 21702
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A and O Construction Services LLC
A and O Construction Services LLC, 10009 Putman Rd, Frederick, MD (Owned by: Stephen Andrew Stupar) holds a Home Improvement license and 3 other licenses according to the Maryland license board.
Their BuildZoom score of 92 ranks in the top 32% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring A and O Construction Services LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
A and O Construction Services LLC Services
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A and O Construction Services LLC Contact Information
Phone Number: (301) 712-6932
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Address: 10009 PUTMAN RD, Frederick, MD 21702
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A and O Construction Services LLC Frederick
Quality
92
68th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
A and O Construction Services LLC has a BuildZoom score of 92, which places them above 68% of 58,058 contractors in Maryland.
Activity
|
1 project
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that A and O Construction Services LLC has worked on at least
2.0 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.
Pricing
|
1 project
|
$50k-$100k |
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 A and O Construction Services LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
<div>new accessory dwelling unit in basement of existing dwelling. new adu to include (1) bedroom (1) bathroom kitchen and office.</div><div>boa - 275058</div><div>
Valuation:
$90,000
Permit #:
441889
Status:
complete
Fee:
$9,481
Permit Type:
Resbldg
Building Type:
N/A
Residential building uses permit
Basement. finish 968 sq.ft.|1st floor living area renovation 968 sq.ft.|convert 2-car garage to 1-car garage for living room. 336 sq.ft.|front porch addition - 84 sq.ft. (rear patio for footers 320 sq.ft)
Valuation:
$160,000
Permit #:
82484
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Cover 16x20 of existing deck to become covered porch. deck built under #b98-0470. *** revised to addition electric 02/25/2011 lw
Valuation:
$14,000
Permit #:
89781
Status:
complete
Fee:
$250
Permit Type:
Resuses
Building Type:
N/A
Attach garage;f porch;fin basement-rec room, exercise, bath;renovate 1&2 flrs
Valuation:
$97,412
Permit #:
BP-11-0235A
Status:
issued
Fee:
$744
Permit Type:
N/A
Building Type:
N/A
Residential building uses permit
Basement finish|will have bar sink rough-in only
Valuation:
$35,250
Permit #:
94217
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Residential building uses permit
16x16 1-story on posts for family room w/10x16 deck w/steps
Valuation:
$28,300
Permit #:
77183
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
Single family dwe...
20 x 12 pressure treated deck with stairs to grade
Valuation:
N/A
Permit #:
BO2010-033
Status:
complete
Fee:
$69
Permit Type:
N/A
Building Type:
N/A
Residential building uses permit
16 x 22 deck w/steps
Valuation:
$13,000
Permit #:
91660
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
Single family dwe...
15 x 18 deck with 5 x 15 pergola
Valuation:
$8,000
Permit #:
BP-10-1258
Status:
issued
Fee:
$25
Permit Type:
N/A
Building Type:
N/A
Finish basement including rec room and a full bathroom 548 sq ft finished space. fletcher's grove phase i single family lot 6
Valuation:
N/A
Permit #:
P2010-1268
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
20x12 deck to rear of dwelling pressure treated lumber with steps to grade
Valuation:
N/A
Permit #:
P2010-1051
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Interior renovations to 1st floor bathroom
Valuation:
$10,000
Permit #:
BP-13-0464
Status:
issued
Fee:
$100
Permit Type:
N/A
Building Type:
N/A
Finishing the basement. bathroom office file room pottery room play area
Valuation:
$80,000
Permit #:
440318
Status:
canceled
Fee:
N/A
Permit Type:
Resuses
Building Type:
N/A
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A and O Construction Services LLC Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
A and O Construction Services LLC License info
Verified License
| License # | 33823 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for A and O Construction Services LLC at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 127251 |
| Status | Active |
| State | Maryland |
| Type | Contractor (Corppart) Home Improvement |
- When BuildZoom last verified this license, it had an expiration date of December, 2016. Check the current license status of A and O Construction Services LLC with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | PA075855 |
| Status | Active |
| State | Pennsylvania |
| Type | General Contractor For Residential Home Improvements, Kitchens, Additions, Bathrooms, Decks, Siding , Replacement Windows, Finish Basements. And Light Commercial, Office And Bathroom Renovations |
- When BuildZoom last verified this license, it had an expiration date of December, 2016. Check the current license status of A and O Construction Services LLC with the Pennsylvania Office of the Attorney General
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 33823 |
| Status | Active |
| State | Pennsylvania |
| Type | Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2016. Check the current license status of A and O Construction Services LLC with the Pennsylvania Office of the Attorney General
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
Insured
| Insurer | Frederick Mutual Insurance |
| Insured up to | $1,000,000 |
12
Permits
- Building permit records show that A and O Construction Services LLC has worked on 12 permitted projects.
A and O Construction Services LLC Employees
AL
A & O Construction Services Llc
Owner
SS
Stephen A. Stupar
Partner
SS
Stephen Andrew Stupar
Owner