Updated: May 06, 2026
Location and Projects
Address
1701 Whiteford Rd, Darlington, MD, 21034
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Ground Loop Heating & Air Conditioning Inc
Ground Loop Heating & Air Inc. is a full service HVAC company. For over 30 years Ground Loop has offered design, installation, and service of geothermal heating and air conditioning systems. Ground Loop also installs and services all brands of traditional HVAC.
From BuildZoom: Ground Loop Heating & Air Conditioning Inc, 1701 Whiteford Rd, Darlington, MD (Employee: Michael E Cullum) holds a Resident Contractor license and 2 other licenses according to the New Castle County license board.
Their BuildZoom score of 113 ranks in the top 3% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Ground Loop Heating & Air Conditioning Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Ground Loop Heating & Air Conditioning Inc Services
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Ground Loop Heating & Air Conditioning Inc Contact Information
Phone Number: (410) 836-1706
Address: 1701 Whiteford Rd, Darlington, MD 21034
Ground Loop Heating & Air Conditioning Inc Darlington
Quality
113
97th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Ground Loop Heating & Air Conditioning Inc has a BuildZoom score of 113, which places them above 97% of 58,058 contractors in Maryland.
Activity
|
20 projects
|
2025 |
|
15 projects
|
2024 |
|
19 projects
|
2023 |
Our building permit records indicate that Ground Loop Heating & Air Conditioning Inc has worked on at least
54.0 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
|
54 projects
|
HVAC projects |
|
23 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Ground Loop Heating & Air Conditioning Inc mostly works on
hvac project
and mechanical project
projects.
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 Ground Loop Heating & Air Conditioning Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replaceing existing hvac system with geothermal system using vertical wells existing ductwork (1) 5-ton w5sz060 waterfernace unit and (1) 4-ton w5sz048 waterfurnace unit
Valuation:
N/A
Permit #:
BRCM-25-016280
Status:
complete
Fee:
$88
Permit Type:
Interior trades only
Building Type:
N/A
Replace existing hvac unit on 1st floor with (1) w3av024 2-ton geothermal waterfurnace unit. we will be using vertical geothermal loops and existing ductwork
Valuation:
N/A
Permit #:
M02228002
Status:
complete
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac with geothermal system using vertical wells and existing ductwork some duct changes will be made to accomedate new unit; installing (1) w5av036 3- ton waterfurnace geothermal unit
Valuation:
N/A
Permit #:
M25001282
Status:
issued
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Residential hvac addition alteration permit
2025-03-13
Replace existing hvac system with a geothermal system using (1)w5av048 4-ton waterfurnace geothermal unit. using vertical wells and existing ductwork
Valuation:
N/A
Permit #:
M25000282
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac with geothermal system using (1) w7av060 5-ton waterfurnace unit; using existing geothermal loops and installing new ductwork
Valuation:
N/A
Permit #:
M02226632
Status:
filed
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Repleace existing conventional hvac in existing house with (1) waterfurnace ndv038 3-ton geothermal unit using existing duct; furnish and install (1) waterfurnace ndv038 3-ton geothermal unit in new addition and installing new duct; both systems will be connected to vertical loops energy method = prescriptive method
Valuation:
N/A
Permit #:
M23000129
Status:
complete
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Replace existing geothermal system with (1) waterfurnace w5sz036 3-ton geothermal unit using existing geothermal loops and existing duct work
Valuation:
N/A
Permit #:
M02226447
Status:
filed
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with a geothermal system using (1) waterfurnace w5sz024 2-ton unit and (1) waterfurnace w5av024 2-ton unit; using vertical loops and existing ductwork
Valuation:
N/A
Permit #:
M25001556
Status:
filed
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with geothermal system using (1) w5ss036 geothermal unit using vertical loops and existing ductwork
Valuation:
N/A
Permit #:
M02225867
Status:
complete
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac unit with (1) geothermal w5av036 3-ton waterfurnace unit; using vertical wells and existing duct work
Valuation:
N/A
Permit #:
M02226131
Status:
complete
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
We are doing the new construction duct work we will drill vertical loops installation of 2 geothermal units - one 6-ton ndv072 9(zoned for the 1st floor and basement) and one 4-ton split unit (zoned for the master and remainder of the 2nd floor)
Valuation:
$82,000
Permit #:
M02209401
Status:
complete
Fee:
$95
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with geothermal system using (1) w5av048 4-ton unit (1) w5av026 2-ton unit and (1) ndz049 4-ton unit; we will use existing ductwork and use new horizonal geothermal loops
Valuation:
N/A
Permit #:
M24001298
Status:
complete
Fee:
$182
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac with (1) waterfurnace ndv049 4-ton geothermal unit and (1) waterfurnace ndz064 5-ton geothermal split unit with matching sah066 air handler using vertical loops and existing duct
Valuation:
N/A
Permit #:
M23000163
Status:
complete
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with geothermal system using vertical loops and existing ductowork. installing (1) w5av048 4-ton waterfurnace geothermal unit
Valuation:
N/A
Permit #:
M25001281
Status:
issued
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with a geothermal system using (1) waterfurnace 7 series nvv060 5-ton package unit and (1) nvz060 5-ton split unit using existing duct and new vertical geothermal loops
Valuation:
N/A
Permit #:
M02224766
Status:
complete
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with geothermal system using (1) waterfurnace w5av036 3-ton unit and (1) ndz026 2-ton unit; using new vertical geothermal wells and some additional ductwork
Valuation:
N/A
Permit #:
M24001273
Status:
complete
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Install new geothermal system in residential new construction using vertical loops and new ductowrk; installing (1) w5av036 3-ton waterfurnace unit
Valuation:
N/A
Permit #:
M02230087
Status:
filed
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with geothermal system using (1) 4-ton w5av048 waterfurnace unit using existing ductwork and horizontal loops
Valuation:
N/A
Permit #:
M25001463
Status:
filed
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with geothermal system using vertical loops and existing ductwork; installing (1) w5av048 4-ton waterfurnace unit
Valuation:
N/A
Permit #:
M02230035
Status:
complete
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with a geothermal system using (1) waterfurnace w5av048 4-ton system using horizontal geothermal loops and existing ductwork
Valuation:
N/A
Permit #:
M24001269
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Ground Loop Heating & Air Conditioning Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Ground Loop Heating & Air Conditioning Inc License info
Verified License
| License # | 2001107055 |
| Status | Active |
| State | New Castle County |
| Type | Resident Contractor |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ground Loop Heating & Air Conditioning Inc at the State of Delaware Department of Finance: Division of Revenue.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | PA096917 |
| Status | Active |
| State | Pennsylvania |
| Type | Geothermal HVAC installation and service. Solar hot water installation and service. |
- When BuildZoom last verified this license, it had an expiration date of December, 2016. Check the current license status of Ground Loop Heating & Air Conditioning Inc with the Pennsylvania Office of the Attorney General
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PA077425 |
| Status | Inactive |
| State | Pennsylvania |
| Type | Geothermal Heating And Air Conditioning Installer |
- 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.
Check this license's status for Ground Loop Heating & Air Conditioning Inc at the Pennsylvania Office of the Attorney General.
This is a sample of licensing data; click here to access a complete history.
113
BuildZoom Score
Insured
| Insurer | Rossman Hurt Hoffman Inc. |
| Insured up to | $1,000,000 |
401
Permits
- Building permit records show that Ground Loop Heating & Air Conditioning Inc has worked on 401 permitted projects.
Ground Loop Heating & Air Conditioning Inc Employees
MC
Michael E Cullum
President