Updated: May 21, 2026
Location and Projects
Address
6476 SLIGO MILL ROAD, Takoma Park, MD, 20912
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Jamsco Construction
Jamsco Inc, 6476 Sligo Mill Rd, Takoma Park, MD (Employees: Jamsco Inc T A Maggio Roofing Company and Jamsco Inc. T/A Maggio Roofing Company) holds a Home Improvement Salesman license and 15 other licenses according to the District of Columbia license board.
Their BuildZoom score of 91 ranks in the top 37% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Jamsco Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Jamsco Inc Services
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Jamsco Inc Contact Information
Phone Number: (301) 891-1390
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Address: 6476 SLIGO MILL ROAD, Takoma Park, MD 20912
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace gas water heater this permit replaces ap# 98174 which had no inspections-blh
Valuation:
$0
Permit #:
172023
Status:
Permit Issued
Fee:
$57
Permit Type:
Replace
Building Type:
Residential townhome
Plumbing permit
New 2-story hotel city of brunswick site plan not approved; rooms not included in grid are laundry crew training room electrical room maid room & corridor; demolish building ap# 113208; diner building ap# 113355|*** revised addition 2 gas dryers 11/13/14 lw
Valuation:
$733,333
Permit #:
119303
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Nonresidential r ...
Plumbing permit
***this permit if for final only. replaces #93739 which has expired***. single family dwelling w/unfin. bsmt.; 2-car garage and front porch|entrance off state road exists
Valuation:
$325,000
Permit #:
104990
Status:
issued
Fee:
N/A
Permit Type:
Reapplication - f...
Building Type:
Single family dwe...
Plumbing permit
Building will be a prefab diner. install new grease trap size 1600 gallon|new restaurant|hotel a/p building #113140|*** maryland state insp. in ole - cert. nr 0039534 ***
Valuation:
$366,666
Permit #:
119304
Status:
issued
Fee:
N/A
Permit Type:
Accessory
Building Type:
Nonresidential bu...
Basement finish to include: west bar sink; ice maker; shower/bath; toliet; bathroom sink basement finish to inc rec room with wet bar personal gym bedroom personal office and bar
Valuation:
$70,000
Permit #:
163121
Status:
Permit Issued
Fee:
$151
Permit Type:
Alteration
Building Type:
Single family dwe...
plumbingpermit
2 outdoor natural gas fireplaces - grill & sink|24 x 11 & 7 x 11 (341 sq. ft )screened porch w gas fireplace addition of storage area (341 sq ft) underneath screen porch |19 x 13 & 7 x 12 open deck w/spiral staircase (331 sq. ft )& |13 x 12 covered porch (156 sq. ft. )
Valuation:
$100,000
Permit #:
166694
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
Single family dwe...
Turning existing gas grill into a firestarter -bldg a/p# 178156 20 x 16 pavillion with fireplace. remove existing pergola
Valuation:
$30,000
Permit #:
180263
Status:
complete
Fee:
N/A
Permit Type:
Plumbperm
Building Type:
N/A
Plumbing permit
Work in this space is 100% complete **submit plans per comments 4-22-13|renovations to suite 400 for a new tenant. previous tenant was in 400 & 402 bank of america who is now residing in only suite 402.|adding an ada restroom. will be demoing some walls to open space for a new future tenant. separte permit required for tenant
Valuation:
$25,000
Permit #:
115494
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Plumbing permit
Single family dwelling w/unfin. bsmt.; 2-car garage and front porch|entrance off state road exists
Valuation:
$325,000
Permit #:
93739
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Single family dwe...
Plumbing for finished basement to include shower toilet sink and wet bar sink
Valuation:
$50,000
Permit #:
160566
Status:
complete
Fee:
$93
Permit Type:
Plumbperm
Building Type:
N/A
Alteration to an existing building ada upgrades
Valuation:
N/A
Permit #:
P02237439
Status:
complete
Fee:
$165
Permit Type:
Alteration
Building Type:
Hotel/motel
Replace/install 63 showers where bathtubs are
Valuation:
N/A
Permit #:
P02236441
Status:
complete
Fee:
$435
Permit Type:
Addition
Building Type:
Hotel/motel
Existing bathroom remodel & convert attic area to be closet - roof truss system to be modified to create closet
Valuation:
$30,000
Permit #:
168233
Status:
Permit Issued
Fee:
$94
Permit Type:
Alteration
Building Type:
Single family dwe...
Plumbing permit
Basement finish to include: west bar sink; ice maker; shower/bath; toliet; bathroom sink ||basement finish to inc rec room with wet bar personal gym bedroom personal office and bar
Valuation:
$70,000
Permit #:
163121
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Plumbing permit
Interior renovation of one guest room (#106) as sample for future guest room renovations. seperate permits required for any other room renovations. no additional plumbing fixtures; replace only
Valuation:
$30,000
Permit #:
135355
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Plumbing permit
18 x 40 ft inground pool
Valuation:
$30,000
Permit #:
160885
Status:
issued
Fee:
N/A
Permit Type:
Accessory
Building Type:
Single family dwe...
Re water house pipe house. install new electric waterheater 1 clothes washer
Valuation:
N/A
Permit #:
P-20161112
Status:
complete
Fee:
$110
Permit Type:
plumbing residential
Building Type:
N/A
Repair water pipe install new electric water heater, repipe laundry
Valuation:
N/A
Permit #:
P-20161113
Status:
complete
Fee:
$110
Permit Type:
plumbing residential
Building Type:
N/A
Plumbing permit
Paritally finished basement to include family room office area and full bathroom. unfinished area will remain and be laundry room
Valuation:
$35,000
Permit #:
147495
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Rough-in bathroom addition and change out fixtures
Valuation:
N/A
Permit #:
P02255973
Status:
complete
Fee:
$65
Permit Type:
N/A
Building Type:
N/A
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Jamsco Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Jamsco Inc License info
License Not Verified
| License # | 420323000198 |
| Status | Active |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of January, 2025. Check the current license status of Jamsco Inc with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 420323000200 |
| Status | Active |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of January, 2025. Check the current license status of Jamsco Inc with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 420323000199 |
| Status | Active |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of January, 2025. Check the current license status of Jamsco Inc with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 410518000251 |
| Status | Active |
| City | District Of Columbia |
| Type | Gen Contr Construction Mngr |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of November, 2023. Check the current license status of Jamsco Inc with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 37729 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Jamsco Inc at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 2705056017 |
| Status | Active |
| State | Virginia |
| Type | Commercial Improvement (Cic), Home Improvement (Hic) |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Jamsco Inc at the Virginia Department of Professional and Occupational Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 420314000336 |
| Status | Active |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of April, 2022. Check the current license status of Jamsco Inc with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 37729 |
| Status | Active |
| State | Pennsylvania |
| Type | Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of January, 2015. Check the current license status of Jamsco Inc 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 # | 37728 |
| Status | Active |
| State | Pennsylvania |
| Type | Contractor Corp Part |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of January, 2015. Check the current license status of Jamsco Inc 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 # | 37728 |
| Status | Active |
| State | Maryland |
| Type | Contractor (Corppart) Home Improvement |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of January, 2015. Check the current license status of Jamsco Inc with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-47563-3 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, 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 Jamsco Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 420319000307 |
| Status | Inactive |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
| Business Type | Corporation |
- According to the Department of Consumer and Regulatory Affairs, 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 Jamsco Inc at the Department of Consumer and Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 420318000522 |
| Status | Inactive |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
| Business Type | Corporation |
- According to the Department of Consumer and Regulatory Affairs, 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 Jamsco Inc at the Department of Consumer and Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-47563-2 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, 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 Jamsco Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 39703927 |
| Status | Inactive |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
| Business Type | Corporation |
- According to the Department of Consumer and Regulatory Affairs, 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 Jamsco Inc at the Department of Consumer and Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 39703926 |
| Status | Inactive |
| City | District Of Columbia |
| Type | Home Improvement Contractor |
| Business Type | Corporation |
- According to the Department of Consumer and Regulatory Affairs, 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 Jamsco Inc at the Department of Consumer and Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
91
BuildZoom Score
27
Permits
- Building permit records show that Jamsco Inc has worked on 27 permitted projects.
Jamsco Inc Employees
JI
Jamsco Inc
Owner
JC
Jamsco Inc T A Maggio Roofing Company
Owner
JC
Jamsco Inc. T/A Maggio Roofing Company
Owner
RL
Robert Leibner
SS
Scott David Siegal
Owner
SS
Scott Siegal
SZ
Steve Zissesman