Updated: Jan 05, 2026
Location and Projects
Address
9375 Gerwig Ln, Columbia, MD, 21046
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Environmental Systems Associates HVAC/Mechanical Contractor
Their BuildZoom score of 0 does not rank in the top 50% of Maryland contractors.
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Environmental Systems Associates Services
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Environmental Systems Associates Contact Information
Phone Number: (410) 381-7991
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Address: 9375 Gerwig Ln, Columbia, MD 21046
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Building Permits by Environmental Systems Associates
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace upper & lower zone furnaces - replace upper zone furnace located in third floor closet and lower zone furnace located in basement with like sized new condensing furnaces. reconnect new equipment to existing gas lines sheet metal ductwork pvc venting systems and condensate drains
Valuation:
N/A
Permit #:
P25002688
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-06-29
Replace upper & low zone hvac systems; the upper zone is comprised of a gas furnace located in a 3rd floor closet & an outdoor condensing unit located on a balcony over the garage at the rear of the home; the lower zone is comprised of a gas furnace in the basement & an outdoor condensing unit located on the same balcony accessible by a short extension ladder; reconnect new equipment ... see more
Valuation:
N/A
Permit #:
E25003504
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace existing gas furnace in utility closet with like sized condensing gas furnace. reconnect new equipment to existing gas line pvc venting system sheet metal duct work and condensate drain. replace existing electric water heater with like sized unit. install drain pan and expansion tank
Valuation:
N/A
Permit #:
P25002644
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace existing gas furnace in attic accessible via hatch with 6 ladder with new like sized fan assist gas furnace. replace existing gas furnace in basement with like sized condensing gas furnace. reconnect new equipment to existing gas lines type b vent flue in attic and pvc venting system in basement sheet metal ductwork and condensate drains
Valuation:
N/A
Permit #:
P25002643
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Gas conversion - replace existing indoor air handler with condensing furnace. provide gas branch line from existing manifold near furnace. connect furnace to existing sheet metal duct work and condensate drain. provide and install pvc venting system
Valuation:
N/A
Permit #:
P25002619
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Gas conversion - replace existing heat pump system with a carrier 59tp6080v17-16 condensing gas furnace cvava3617xma evaporator coil 26tpa836w003 air conditioning condensing unit and systxcc01-b thermostat. reconnect system to existing sheet metal duct work and provide and install new pvc venting system and condensate drain
Valuation:
N/A
Permit #:
M25000836
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-06-25
Unit r - replace existing hvac system comprised of a gas furnace in the utility closet & a thru-the-wall condensing unit in same closet w new like sized equipment; replace existing electric water heater; reconnect the new equipment to existing circuits
Valuation:
N/A
Permit #:
E25003444
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-06-25
Replace existing gas furnace in attic accessible through hatch w ladder & outdoor condensing unit on the left side of the home w like sized equipment; replace existing furnace in basement & outdoor condensing unit on the left side of the home w like sized equipment; reconnect new equipment to existing circuits
Valuation:
N/A
Permit #:
E25003443
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace existing gas furnace in basement with new like sized fan assist gas furnace. replace the gas water heater with a like sized atmospheric vent gas water heater. reconnect new equipment to existing gas lines type b vent flue sheet metal duct work and condensate drain. install drain pan and expansion tank for water heater
Valuation:
N/A
Permit #:
P25002512
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-06-18
Replace upper zone heat pump system comprised of an air handler in the attic accessible via an access hatch on the second floor w an 8 step ladder & an outdoor unit located behind the garage w like sized equipment; reconnect new equipment to existing circuits
Valuation:
N/A
Permit #:
E25003272
Status:
issued
Fee:
$155
Permit Type:
N/A
Building Type:
N/A
Note : this is actually unit a - the owner information is accurate the parcel and address are not correct. replace existing gas furnace in basement with new like sized fan assist gas furnace. reconnect new equipment to existing gas line type b vent flue sheet metal duct work and condensate drain
Valuation:
N/A
Permit #:
P25002481
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace existing upper zone gas furnace in attic accessible via hatch with 8 ladder with new like sized fan assist gas furnace. replace lower zone furnace in basenment with like sized fan assist furnace. reconnect new equipment to existing gas lines type b vent flues sheet metal ductwork and condensate drains
Valuation:
N/A
Permit #:
P25002456
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-06-13
Replace existing upper zone hvac system comprised of a gas furnace in the attic accessible via an attic hatch w a 8 ladder & an air conditioning condensing unit on the left side of the home; replace existing lower zone system comprised of a gas furnace located in the basement & an air conditioning condensing unit on the right side of the home; reconnect new equipment to existing circuits
Valuation:
N/A
Permit #:
E25003196
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace three hvac systems. the upper zone is is a fan assist gas furnace in the attic accessible via a pull down stair. there are two fan assist gas furnaces in the basement serving left and right zones. all equipment will be replaced with like sized equipment and reconnected to existing gas lines type b vent flues sheet metal duct work and condensate drains
Valuation:
N/A
Permit #:
P25002291
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-06-03
Replacing (3) hvac systems upper zone system is comprised of a gas furnace in the attic accessible via a pull down stair & a condensing unit on the left side of the home; there are (2) gas furnaces in the basement serving left & right zone w condensing units on the left side of the home; all new equipment will be reconnected to existing circuits
Valuation:
N/A
Permit #:
E25002906
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-05-29
Replace existing gas furnace in basement & outdoor condensing unit on the right side of the home w like sized equipment; install new aprilaire steam humidifier; run new properly sized circuits to new equipment from existing panel in basement; connect circuits to new equipment
Valuation:
N/A
Permit #:
E25002839
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace two existing gas furnaces in basement with like sized condensing gas furnaces. replace third existing gas furnace in mechanical room that serves the upper zone with like sized furnace. reconnect new equipment to existing gas lines pvc venting systems sheet metal duct work and condensate drains
Valuation:
N/A
Permit #:
P25002130
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-05-22
Replace (2) existing gas furnaces in basement & third existing gas furnace in an equipment closet serving the upper zone; replace the (3) existing outdoor unit on the left side of the home w like sized equipment; reconnect al new equipment to existing circuits
Valuation:
N/A
Permit #:
E25002719
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-05-20
Replace existing gas furnace in basement & outdoor condensing unit on the left side of the home w like sized equipment; reconnect new equipment to existing circuits; provide & install new whole house dehumidifier in crawl space; plug into existing outlet
Valuation:
N/A
Permit #:
E25002654
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace existing upper zone hvac system comprised of a gas furnace in the attic accessible via an attic hatch w a 8 ladder & an air conditioning condensing unit on the rear of the home w like sized equipment; reconnect new equipment to existing circuits
Valuation:
N/A
Permit #:
E25002603
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
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Environmental Systems Associates License info
Inactive License
| Status | Inactive |
- According to the local license board, 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.
This is a sample of licensing data; click here to access a complete history.
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2.4K
Permits
- Building permit records show that Environmental Systems Associates has worked on 2377 permitted projects.