Updated: May 30, 2026
Location and Projects
Address
White Hall, MD, 21161
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Langenfelder Mechanical Inc
Langenfelder Mechanical Inc, White Hall, MD (Owned by: Mark Langenfelder) holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 4 other licenses according to the Maryland license board.
Their BuildZoom score of 104 ranks in the top 9% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Langenfelder Mechanical Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Langenfelder Mechanical Inc Contact Information
Phone Number: (410) 477-0400
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Langenfelder Mechanical Inc White Hall
Quality
104
91st percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Langenfelder Mechanical Inc has a BuildZoom score of 104, which places them above 91% of 58,058 contractors in Maryland.
Activity
|
35 projects
|
2025 |
|
1 project
|
2024 |
|
4 projects
|
2023 |
Our building permit records indicate that Langenfelder Mechanical Inc has worked on at least
40.0 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
|
6 projects
|
Home Additions |
|
25 projects
|
HVAC projects |
|
4 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Langenfelder Mechanical Inc mostly works on
hvac project
and home addition
projects.
Pricing
|
2 projects
|
< $5k |
|
6 projects
|
$5k-$20k |
The typical size of their permits is approximately $5,500. 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 Langenfelder Mechanical Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Install (1) 36000 btu air-con system heat pump (3) 70 cfm exhaust systems (1) # new distribution system (1-2 family) (1) # electric water heater (12) # plumbing fixtures (1) # sanitary connection (reconstruction0 (1) # water service pipe (reconstruction) as per code. remodel 2.5 bathrooms kitchen laundry room sump pump 2.5 ton air con system new distribution system electric water heater
Valuation:
N/A
Permit #:
BRCM-25-006778
Status:
complete
Fee:
$267
Permit Type:
Interior trades only
Building Type:
N/A
Install (1) 36000 btu air-con system heat pump (3) 70 cfm exhaust systems (1) # new distribution system (1-2 family) (1) # electric water heater (12) # plumbing fixtures (1) # sanitary connection (reconstruction0 (1) # water service pipe (reconstruction) as per code remodel 2.5 bathrooms kitchen laundry room sump pump 2.5 ton air con system new distribution system electric water heater
Valuation:
N/A
Permit #:
BRCM-25-005598
Status:
complete
Fee:
$267
Permit Type:
Interior trades only
Building Type:
N/A
Install (1) 36000 btu air-con system heat pump (3) 70 cfm exhaust systems (1) # new distribution system (1-2 family) (1) # electric water heater (12) # plumbing fixtures (1) # sanitary connection (reconstruction0 (1) # water service pipe (reconstruction) as per code remodel 2.5 bathrooms kitchen laundry room sump pump 2.5 ton air con system new distribution system electric water heater
Valuation:
N/A
Permit #:
BRCM-25-005590
Status:
closed - void
Fee:
$550
Permit Type:
Interior trades only
Building Type:
N/A
1/2 bathroom in basement 1 laundry tray new kitchen sink remodel bathroom on 2nd floor addition new bathroom on 2 nd floor and 3rd floor new furnace and electric water heater distribution system
Valuation:
N/A
Permit #:
BRCM-25-018713
Status:
complete
Fee:
$246
Permit Type:
Interior trades only
Building Type:
N/A
Replace fixtures 10 fixtures total -bathrooms kitchen laundry room install electric water heater gas stove 36000 btus replace furnace 80000 btus and reconstruction of existing distribuion system and ductwork
Valuation:
N/A
Permit #:
BRCM-25-009025
Status:
complete
Fee:
$199
Permit Type:
Interior trades only
Building Type:
N/A
Install new duct work 2 80k btu 90 plus furnace 2 2.5 t condensor 3 fans 1 dryer vent
Valuation:
$5,000
Permit #:
M02228024
Status:
complete
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
New hvac system air conditioning 2 ton 10 plumbing fixtures-adding one new bathroom remodel exsisting bathroom kitchen remodel
Valuation:
N/A
Permit #:
BRCM-25-007830
Status:
complete
Fee:
$230
Permit Type:
Interior trades only
Building Type:
N/A
Adding 4 supply air outlets and 2 exhaust fans with exhaust piping in basement
Valuation:
N/A
Permit #:
M25000031
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
* provide and install new stainless steel sink with prerinse faucet * provide and install new bottle filler cooler * run new drain line for the above with a mechanical vent * run new water line for the above
Valuation:
N/A
Permit #:
P02305044
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Install brand new distribution system and instal 80k bto air con system
Valuation:
N/A
Permit #:
BRCM-25-010491
Status:
complete
Fee:
$83
Permit Type:
Interior trades only
Building Type:
N/A
Install 80k btu furnace with duct work exhaust fan and dryer vent
Valuation:
N/A
Permit #:
BRCM-25-008126
Status:
complete
Fee:
$125
Permit Type:
Interior trades only
Building Type:
N/A
Single family dwelling - addition install hvac system energy method = prescriptive method
Valuation:
N/A
Permit #:
M23000654
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
*100 jones station rd @ peninsula farm rd tenants parker memorial rest area water connection only for water fountain cc's paid through journal entry printed
Valuation:
N/A
Permit #:
W02200197
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Adding 1 vent supply and one bathroom vent
Valuation:
N/A
Permit #:
M02225849
Status:
complete
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Request gas meter to be increased
Valuation:
N/A
Permit #:
PG00037171
Status:
filed
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Install gas water heater 30000 btus furnace 100000 btus and stove 36000 btus and new distribution system
Valuation:
N/A
Permit #:
BRCM-25-017633
Status:
complete
Fee:
$196
Permit Type:
Interior trades only
Building Type:
N/A
Residential hvac addition alteration permit
2021-12-08
Single family dwelling 2nd story addition over existing garage install ductless mini split energy method = prescriptive method
Valuation:
N/A
Permit #:
M21001084
Status:
complete
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Single family dwelling alterations install hvac system
Valuation:
N/A
Permit #:
M23000371
Status:
complete
Fee:
$169
Permit Type:
N/A
Building Type:
N/A
New duct work gas furnace 80k btu air con system
Valuation:
N/A
Permit #:
BRCM-25-014315
Status:
complete
Fee:
$115
Permit Type:
Interior trades only
Building Type:
N/A
Addition range hood
Valuation:
$500
Permit #:
M02214421
Status:
expired
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Langenfelder Mechanical Inc License info
Verified License
| License # | 82704 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Langenfelder Mechanical Inc at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | HM-0001105 |
| Status | Active |
| State | Delaware |
| Type | Hvacr |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Langenfelder Mechanical Inc at the State of Delaware.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 5890 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Langenfelder Mechanical Inc at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 2010605656 |
| Status | Active |
| State | New Castle County |
| Type | Non Resident Contractor |
| Date Issued | 01-01-2026 |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Langenfelder Mechanical 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.
Inactive License
| License # | CON-4648 |
| Status | Inactive |
| City | Annapolis |
| Type | Mech Cont |
- According to the The City of Annapolis, MD, 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 Langenfelder Mechanical Inc at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
104
BuildZoom Score
82
Permits
- Building permit records show that Langenfelder Mechanical Inc has worked on 82 permitted projects.
Langenfelder Mechanical Inc Employees
ML
Mark Langenfelder
Owner
ML
Mark Timothy Langenfelder
Applicant