Updated: Feb 12, 2026
Location and Projects
Address
05-13551937 SOUTH PROSPECT AVE, Baltimore, MD, 21228
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Mammoth Construction LLC
Mammoth Construction LLC, 05-13551937 S Prospect Ave, Baltimore, MD holds a Home Improvement license according to the Maryland license board.
Their BuildZoom score of 97 ranks in the top 18% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Mammoth Construction LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Mammoth Construction LLC Services
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Mammoth Construction LLC Contact Information
Address: 05-13551937 SOUTH PROSPECT AVE, Baltimore, MD 21228
Mammoth Construction LLC Baltimore
Quality
97
82nd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Mammoth Construction LLC has a BuildZoom score of 97, which places them above 82% of 58,058 contractors in Maryland.
Activity
|
1 project
|
2025 |
|
4 projects
|
2024 |
Our building permit records indicate that Mammoth Construction LLC has worked on at least
5.0 projects over the past 2 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
|
$5k-$20k |
|
1 project
|
$20k-$50k |
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 Mammoth Construction LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Sfd/demo room built around pool built by another contractor that was not built to code or with permit this includes some electrical work that will be completed and disconnected by a licensed electrician**subject to field inspection**
Valuation:
N/A
Permit #:
B24002447
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Single family dwelling construct roof on existing 31 x 14 deck to create screened porch**approval based on post added to carry lvl subject to field inspection**
Valuation:
N/A
Permit #:
B25003524
Status:
issued
Fee:
$169
Permit Type:
N/A
Building Type:
N/A
Single family dwelling remove and replace existing deck boards and rails and support beam with columns and replace with new on a 26ftx15ft deck with stairs
Valuation:
N/A
Permit #:
B22004167
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Single family dwelling building new set of stairs to existing deck structure
Valuation:
N/A
Permit #:
B22002149
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Single family dwelling remove existing steps and relocate to other side
Valuation:
N/A
Permit #:
B22001037
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Sfd/8ft x 21ft extension off of existing deck and new set of stairs
Valuation:
N/A
Permit #:
B22003793
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Single family dwelling demolish existing deck and construct new 21x20 deck with stairs**subject to field inspection**
Valuation:
N/A
Permit #:
B24002097
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Remove existing deck and replace in kind
Valuation:
$17,000
Permit #:
B02430489
Status:
complete
Fee:
$140
Permit Type:
N/A
Building Type:
N/A
Nov single family dwelling construct (2) new porches (#1) 20 x 20 x 10'& (#2) 20 x 30 x 10
Valuation:
N/A
Permit #:
B20000453
Status:
complete
Fee:
$323
Permit Type:
N/A
Building Type:
N/A
Contruct retaining wall
Valuation:
$30,000
Permit #:
B02423014
Status:
complete
Fee:
$200
Permit Type:
N/A
Building Type:
N/A
Single family dwelling construct 17 x 32 l-shaped open deck with steps
Valuation:
N/A
Permit #:
B18001733
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Single family dwelling remove existing deck and replace with new 23 x 14 open deck with steps
Valuation:
N/A
Permit #:
B20003002
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Building roof over existing deck with metal black roofing for roof materials we will then screen in deck on 3 sides
Valuation:
N/A
Permit #:
B25003518
Status:
canceled
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Demolish existing deck and rebuild new deck to match
Valuation:
$20,000
Permit #:
B02430351
Status:
canceled
Fee:
$140
Permit Type:
N/A
Building Type:
N/A
Mammoth Construction LLC Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Mammoth Construction LLC License info
Verified License
| License # | 115551 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Mammoth Construction LLC at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
12
Permits
- Building permit records show that Mammoth Construction LLC has worked on 12 permitted projects.