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Location and Projects

Address
10500 Reisterstown Rd, Owings Mills, MD, 21117
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Farnen & Dermer Inc. Construction

We are Maryland's oldest and most reliable air conditioning, heating, and plumbing service provider. We've been in business since 1902 and are a 5th generation family business!

From BuildZoom: Farnen & Dermer Inc., 10500 Reisterstown Rd, Owings Mills, MD (Owned by: Edward L Dermer) holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 8 other licenses according to the Maryland license board.

Their BuildZoom score of 92 ranks in the top 32% of 58,058 Maryland licensed contractors.

Their license was verified as active when we last checked. If you are thinking of hiring Farnen & Dermer Inc., we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.

Farnen & Dermer Inc. Services

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Seismic Retrofit

Farnen & Dermer Inc. Contact Information

Phone: (410) 921-3160
Address: 10500 Reisterstown Rd, Owings Mills, MD 21117

Farnen & Dermer Inc. Owings Mills

Quality

92
68th percentile
How is the BuildZoom score calculated?
Pro tip: We generally recommend hiring a contractor with a score higher than 95.
Farnen & Dermer Inc. has a BuildZoom score of 92, which places them above 68% of 58,058 contractors in Maryland.

Activity

3 projects
 2025
5 projects
 2024
Our building permit records indicate that Farnen & Dermer Inc. has worked on at least 8.0 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.

Pricing

2 projects
 $5k-$20k
Value Not Public: 6.0 projects
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 Farnen & Dermer Inc.

Sort by: Notable Notable | Date Date | Job Value Job Value

This is a sample of this contractor's permits. Click here to access their complete permit history.

Residential plumbing addition alteration permit
9062 Dunloggin Rd, Ellicott City, MD, 21042
2025-01-23
Sfd/install a columbia gas fired hot water boiler.- replacement install a gas water heater- replacement
Valuation:
N/A
Permit #:
P25000295
Status:
complete
Fee:
$105
Permit Type:
N/A
Building Type:
N/A
Mechanical permit
313 Fernwood Dr, Severna Park, MD, 21146
2024-04-05
Install a 2 zone mini split heat pump system electric to be done by others
Valuation:
$9,800
Permit #:
M02220635
Status:
complete
Fee:
$95
Permit Type:
N/A
Building Type:
N/A
Residential hvac addition alteration permit
1211 Wild Rose Ct, Marriottsville, MD, 21104
2025-06-10
Install a gas furnace in place of the air handler. propane line to be run by propane company
Valuation:
N/A
Permit #:
M25000732
Status:
complete
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Residential plumbing addition alteration permit
11905 Frederick Rd, Ellicott City, MD, 21042
2022-05-04
Sfd: install gas fixtures: 1- furnace * addition bge wo# 17062512 to permit 06-28-22 jei *
Valuation:
N/A
Permit #:
P22001828
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Mechanical permit
313 Fernwood Dr, Severna Park, MD, 21146
2024-04-05
Install a 2 zone mini split heat pump system electric to be done by others
Valuation:
$9,800
Permit #:
M02220635
Status:
complete
Fee:
$95
Permit Type:
N/A
Building Type:
N/A
Mechanical permit
313 Fernwood Dr, Severna Park, MD, 21146
2024-04-05
Install a 2 zone mini split heat pump system electric to be done by others
Valuation:
$9,800
Permit #:
M02220635
Status:
complete
Fee:
$95
Permit Type:
N/A
Building Type:
N/A
Mechanical permit
76 Bar Harbor Rd, Pasadena, MD, 21122
2024-02-15
Replace heat pump
Valuation:
$16,000
Permit #:
M02220129
Status:
filed
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Express plumbing permit
11180 Chambers Ct, Woodstock, MD, 21163
2024-05-30
Replace gas furnace and through the wall air conditioning unit in the condo
Valuation:
N/A
Permit #:
P24002160
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
11080 Chambers Ct, Woodstock, MD, 21163
2024-05-30
Replace gas furnace and through the wall air conditioning unit in condo
Valuation:
N/A
Permit #:
E24002936
Status:
expired
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
11905 Frederick Rd, Ellicott City, MD, 21042
2022-10-13
Gas conversion of the heating system. 410.526.0172
Valuation:
N/A
Permit #:
E22005633
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
1211 Wild Rose Ct, Marriottsville, MD, 21104
2025-06-10
Install a circuit for gas furnace
Valuation:
N/A
Permit #:
E25003063
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential hvac addition alteration permit
1435 Coventry Meadows Dr, Sykesville, MD, 21784
2024-10-04
Replace gas furnace and air conditioning system
Valuation:
N/A
Permit #:
M24001112
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Residential hvac addition alteration permit
11293 Old Frederick Rd, Marriottsville, MD, 21104
2025-07-15
Replace heat pump system
Valuation:
N/A
Permit #:
M25000969
Status:
issued
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Commercial plumbing addition alteration permit
8080 Main St, Ellicott City, MD, 21043
2018-06-26
Dda18000160 deer ridge trading co replace gas boiler & electric water heater damaged by flood install bfp - watts 911 (boiler)
Valuation:
N/A
Permit #:
P18002749
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Mechanical permit
76 Bar Harbor Rd, Pasadena, MD, 21122
2024-02-15
Replace heat pump
Valuation:
$16,000
Permit #:
M02220129
Status:
filed
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential new plumbing permit
7814 Farmstone Ct, Ellicott City, MD, 21043
2020-03-13
Single family dwelling replace defective sewer line
Valuation:
N/A
Permit #:
P20001089
Status:
complete
Fee:
$160
Permit Type:
N/A
Building Type:
N/A
Residential hvac addition alteration permit
3411 Dogwood Dr 4815e6, Ellicott City, MD, 21042
2019-10-25
Single family dwelling gas conversion
Valuation:
N/A
Permit #:
M19000912
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Mechanical (residential)
2930 Shelley Ct, Abingdon, MD, 21009
2018-02-12
Replace back up heat
Valuation:
$0
Permit #:
MR-001953-2018
Status:
Issued
Fee:
N/A
Permit Type:
Miscellaneous
Building Type:
N/A
Mechanical permit
328 Lazywood Ct, Millersville, MD, 21108
2015-08-07
Replace furnace and air conditioning install a natural gas furnace install an air conditioning system
Valuation:
N/A
Permit #:
M02164280
Status:
complete
Fee:
$80
Permit Type:
N/A
Building Type:
N/A
Commercial plumbing addition alteration permit
8080 Main St, Ellicott City, MD, 21043
2016-09-27
Dda park ridge trading company replace existing gas furnace and install watts 911 backflow preventor
Valuation:
N/A
Permit #:
P16004595
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A

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