Updated: Oct 15, 2025
Location and Projects
Address
Frederick, MD, 21703
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Markool Heating and Cooling
Markool Heating and Cooling, holds a license according to the Maryland license board.
Their BuildZoom score of 102 ranks in the top 11% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Markool Heating and Cooling, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Markool Heating and Cooling Contact Information
Phone Number: (301) 732-4244
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Markool Heating and Cooling
Quality
102
89th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Markool Heating and Cooling has a BuildZoom score of 102, which places them above 89% of 58,058 contractors in Maryland.
Activity
|
5 projects
|
2025 |
|
7 projects
|
2024 |
|
6 projects
|
2023 |
Our building permit records indicate that Markool Heating and Cooling has worked on at least
18.0 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
|
3 projects
|
Home Additions |
|
15 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Markool Heating and Cooling mostly works on
hvac project
and home addition
projects.
Pricing
|
1 project
|
$5k-$20k |
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 Markool Heating and Cooling
This is a sample of this contractor's permits. Click here to access their complete permit history.
Altering the rough in that is currently in the basement to accommodate the new design of the basement bathroom going in along with setting fixtures when the construction portion is finished
Valuation:
N/A
Permit #:
472405
Status:
complete
Fee:
$114
Permit Type:
Plumbperm
Building Type:
N/A
<div>installation for natural gas fixtures: (3) ranges (2) deep fryers (1) rice cooker.</div><div>
Valuation:
N/A
Permit #:
470442
Status:
complete
Fee:
$183
Permit Type:
Plumbperm
Building Type:
N/A
Installing (1) laundry sink in the basement located in the living room area. new sink drain will be tied into the 4” pvc stack with exposed piping for the water lines and the drain because homeowner does not want to remove any drywall
Valuation:
N/A
Permit #:
474542
Status:
complete
Fee:
$114
Permit Type:
Plumbperm
Building Type:
N/A
Supply and install one mini-split heat pump to condition an addition being built on this existing home. the equipment to include carrier ductless indoor highwall head unit #40mhhq12-3 and matching carrier 12 000 btu outdoor heat pump #38mhrbq12aa3. energy method
Valuation:
N/A
Permit #:
M21000003
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Rotating the kitchen drain line from the existing installation two feet to the left for the new kitchen sink along with the water lines. new garbage disposal and dishwasher
Valuation:
N/A
Permit #:
477243
Status:
complete
Fee:
$114
Permit Type:
Plumbperm
Building Type:
N/A
Relocate the (ng) water heater in the basement. moving water heater approximately 10ft so that it is against the wall and not in the middle of the room
Valuation:
N/A
Permit #:
486901
Status:
expired
Fee:
$70
Permit Type:
Plumbperm
Building Type:
N/A
Wiring an addition which will include a new bathroom and washing machine hook up. homeowner also has radon piping that will be ran
Valuation:
N/A
Permit #:
482546
Status:
expired
Fee:
$183
Permit Type:
Plumbperm
Building Type:
N/A
<div>interior renovation</div>need to pull a permit to get the work that has been started by another plumber
Valuation:
N/A
Permit #:
473747
Status:
expired
Fee:
$312
Permit Type:
Plumbperm
Building Type:
N/A
Supply and installation of new air conditioning and natural gas furnace with ductwork for new construction home. energy method = performance method
Valuation:
N/A
Permit #:
M22000993
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Finishing roughed in bathroom in basement that has the ground work completed already. (1) shower (1) toilet & (1) vanity going to sewage ejector pump<div>
Valuation:
N/A
Permit #:
473596
Status:
complete
Fee:
$114
Permit Type:
Plumbperm
Building Type:
N/A
Gas furnace/gas water heater
Valuation:
N/A
Permit #:
SFP-1529954-2025
Status:
expired
Fee:
$160
Permit Type:
N/A
Building Type:
N/A
Install single zone mini-split heat pump in bedroom addition at rear of home. outdoor unit to sit on south side of the home. energy method = prescriptive method
Valuation:
N/A
Permit #:
M21000830
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Gas furnace/gas furnace
Valuation:
N/A
Permit #:
SFP-1542509-2025
Status:
final
Fee:
$160
Permit Type:
N/A
Building Type:
N/A
Gas furnace
Valuation:
N/A
Permit #:
SFP-1542505-2025
Status:
final
Fee:
$160
Permit Type:
N/A
Building Type:
N/A
Converting garage to be rec. room with wet bar - no appliances full bathroom
Valuation:
N/A
Permit #:
476176
Status:
complete
Fee:
$228
Permit Type:
Plumbperm
Building Type:
N/A
Install new 2 ton mini split heat pump with two 1 ton indoor head units in new garage energy method
Valuation:
N/A
Permit #:
M21001128
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Remove and replace natural gas furnace and air conditioning
Valuation:
N/A
Permit #:
378184
Status:
complete
Fee:
$61
Permit Type:
Plumbperm
Building Type:
N/A
Installing the lp gas range located in the kitchen
Valuation:
N/A
Permit #:
479050
Status:
complete
Fee:
$114
Permit Type:
Plumbperm
Building Type:
N/A
Replacing for like furnace and air conditioning system
Valuation:
$11,965
Permit #:
MECH-31528-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Gas furnace
Valuation:
N/A
Permit #:
SFP-1432195-2023
Status:
final
Fee:
$135
Permit Type:
N/A
Building Type:
N/A
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Markool Heating and Cooling Reviews
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Markool Heating and Cooling License info
License Not Required
| Status | Not Required |
- BuildZoom verified in January, 2022 that this contractor does not need a license to be a contractor in Maryland.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PA172097 |
| Status | Inactive |
| State | Pennsylvania |
- According to the Pennsylvania Office of the Attorney General, 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 Markool Heating and Cooling at the Pennsylvania Office of the Attorney General.
This is a sample of licensing data; click here to access a complete history.
102
BuildZoom Score
31
Permits
- Building permit records show that Markool Heating and Cooling has worked on 31 permitted projects.