Updated: Jun 01, 2026
Location and Projects
Address
600 JONES ROAD, Severn, MD, 21114
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Costello's Hearth Operating Plumber
Costello's Hearth Operating Corp, 600 Jones Rd, Severn, MD (Employees: John Cashmere, Joseph Magliulo, and Robert Paul Costello) holds a Home Improvement license and 2 other licenses according to the Maryland license board.
Their BuildZoom score of 107 ranks in the top 6% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Costello's Hearth Operating Corp, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Costello's Hearth Operating Corp Services
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Costello's Hearth Operating Corp Contact Information
Address: 600 JONES ROAD, Severn, MD 21114
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Costello's Hearth Operating Corp Severn
Quality
107
94th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Costello's Hearth Operating Corp has a BuildZoom score of 107, which places them above 94% of 58,058 contractors in Maryland.
Activity
|
17 projects
|
2025 |
|
24 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Costello's Hearth Operating Corp has worked on at least
44.0 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
|
22 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Costello's Hearth Operating Corp mostly works on
plumbing project
projects.
Pricing
|
5 projects
|
< $5k |
|
21 projects
|
$5k-$20k |
The typical size of their permits is approximately $6,142. This graph shows the distribution of these job values.
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 Costello's Hearth Operating Corp
This is a sample of this contractor's permits. Click here to access their complete permit history.
Install pellet stove
Valuation:
$6,904
Permit #:
B02422972
Status:
filed
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Remove existing wood burning fireplace and replace with new wood burning stove
Valuation:
$7,000
Permit #:
MECHR-2025-00296
Status:
final
Fee:
$125
Permit Type:
N/A
Building Type:
N/A
Exterior chimney repair
Valuation:
$10,478
Permit #:
B02431365
Status:
complete
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
Single family dwelling install a harman accentra 52i-tc pellet fireplace insert into masonry fireplace in in family room
Valuation:
N/A
Permit #:
B22003682
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace stove insert
Valuation:
$7,080
Permit #:
B02433531
Status:
filed
Fee:
$190
Permit Type:
N/A
Building Type:
N/A
Install pellet stove into existing fireplace
Valuation:
$6,000
Permit #:
RESREN24-2701
Status:
approved
Fee:
$40
Permit Type:
N/A
Building Type:
N/A
Install pellet insert in existing fireplace
Valuation:
$6,496
Permit #:
B02432424
Status:
complete
Fee:
$190
Permit Type:
N/A
Building Type:
N/A
Install stove insert to existing fireplace
Valuation:
$3,975
Permit #:
B02429993
Status:
expired
Fee:
$85
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
FG-1446603-2023
Status:
final
Fee:
$265
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
FG-1520642-2025
Status:
final
Fee:
$275
Permit Type:
N/A
Building Type:
N/A
Install of gas line and decorative fireplace
Valuation:
N/A
Permit #:
PG00045261
Status:
filed
Fee:
$112
Permit Type:
N/A
Building Type:
N/A
Install of gas insert chaska into existing gas line
Valuation:
$5,468
Permit #:
B02429903
Status:
rejected
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Single family dwelling install quadra fire pellet stove in existng fireplace
Valuation:
N/A
Permit #:
B21004471
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$0
Permit #:
FG-1435785-2023
Status:
issued
Fee:
$265
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
FG-1505775-2024
Status:
issued
Fee:
$275
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
FG-1472490-2024
Status:
expired
Fee:
$265
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
FG-1471193-2024
Status:
expired
Fee:
$265
Permit Type:
N/A
Building Type:
N/A
Install gas fireplace
Valuation:
$8,894
Permit #:
B02424483
Status:
expired
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Residential installing new pellet stove
Valuation:
N/A
Permit #:
202205318
Status:
issued
Fee:
N/A
Permit Type:
Hvacr
Building Type:
N/A
New install of pellet stove/fireplace
Valuation:
N/A
Permit #:
MEC22-0608
Status:
final
Fee:
$125
Permit Type:
New building - re...
Building Type:
N/A
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120
BZ Score
-
Avg Project
-
Projects
120
BZ Score
$1.5K
Avg Project
-
Projects
120
BZ Score
$1.5K
Avg Project
-
Projects
Costello's Hearth Operating Corp Reviews
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Verified License
BuildZoom confirmed this contractor's license
Costello's Hearth Operating Corp License info
Verified License
| License # | 149884 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Costello's Hearth Operating Corp at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 146363 |
| Status | Inactive |
| State | Maryland |
| Type | Home Improvement |
- According to the Maryland Department of Labor, Licensing & Regulation, 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 Costello's Hearth Operating Corp at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 115106 |
| Status | Inactive |
| State | Maryland |
| Type | Home Improvement |
- According to the Maryland Department of Labor, Licensing & Regulation, 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 Costello's Hearth Operating Corp at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
107
BuildZoom Score
62
Permits
- Building permit records show that Costello's Hearth Operating Corp has worked on 62 permitted projects.
Costello's Hearth Operating Corp Employees
JC
John Cashmere
JM
Joseph Magliulo
RC
Robert Paul Costello