Updated: May 30, 2026
Location and Projects
Address
Gaithersburg, MD, 20879
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Timothy Nengel HVAC/Mechanical Contractor
Timothy Nengel, Gaithersburg, MD (Employee: Timothy E. Nengel) holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 3 other licenses according to the Maryland license board.
Their BuildZoom score of 100 ranks in the top 13% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Timothy Nengel, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Timothy Nengel Contact Information
Phone Number: (703) 653-8687
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Timothy Nengel Gaithersburg
Quality
100
87th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Timothy Nengel has a BuildZoom score of 100, which places them above 87% of 58,058 contractors in Maryland.
Activity
|
1 project
|
2025 |
|
1 project
|
2024 |
|
4 projects
|
2023 |
Our building permit records indicate that Timothy Nengel has worked on at least
6.0 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
|
4 projects
|
Mechanical projects |
|
4 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Timothy Nengel mostly works on
hvac project
and mechanical project
projects.
Pricing
|
1 project
|
$5k-$20k |
|
1 project
|
$20k-$50k |
|
1 project
|
$100k-$250k |
|
1 project
|
$500k-$1mil |
The typical size of their permits is approximately $50,000. 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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Commercial building improvement/renovation - interior fit up
2025-01-15
New construction in existing building shell to include interior partitions doors ceiling lights power mechanical plumbing millwork and finishes for 3175 sf office. remainder is existing unconditioned 32.290 sf wearhouse
Valuation:
$582,499
Permit #:
CIMP-33397-2024
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1) 4 – daikin 3 ton mini split systems 2) 4 - wall mounted ahu 3) 4 – daikin 1.5 ton mini split heat pumps 4) 4 - ceiling cassette units. 5) 1 - erv unit 6) 8 - air devices 7) ductwork
Valuation:
$105,000
Permit #:
M02218839
Status:
complete
Fee:
$617
Permit Type:
N/A
Building Type:
N/A
Mechanical to install (1) 7.5 ton gas heat electric cool remote terminal unit (4) ceiling mount exhaust fans (14) diffusers and ductwork proposed warehouse western maryland parkway
Valuation:
N/A
Permit #:
2023-02482
Status:
complete
Fee:
$220
Permit Type:
N/A
Building Type:
N/A
Building (c) - improvement - interior fit up
2022-09-22
Construct individual salon suites
Valuation:
$800,000
Permit #:
CIMP-26715-2021
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building (c) - improvement - interior fit up
2020-06-23
Demolition of existing walls construction of new walls replacement of storefront windows addition replacement of electrical & hvac and new finishes
Valuation:
$254,000
Permit #:
CIMP-21290-2020
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work in this phase is for the meeting spaces including meeting rooms and pre function areas. replace existing finishes with new finishes (carpet vmc paint etc). enlarge several meeting entry alcoves for ada clearance requirements provide new doors at the operable wall storage alcoves and replace lighting and controls with led lighting systems. (phase 4)
Valuation:
$280,000
Permit #:
CIMP-18933-2019
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Interior alteration new tenant work. drywall door electrical receptacle mechanical dust diffusers and related work
Valuation:
$50,000
Permit #:
CIMP-28884-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace (1) 5 ton split system heat pump and (1) 7.5 ton split system heat pump
Valuation:
$26,500
Permit #:
MECH-27484-2022
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building (c) - improvement - interior fit up
2018-12-13
Interior renovation of the hematology/chemistry lab to include demolition and construction of drywall partitions associated mechanical electrical and plumbing engineering work counter tops and cabinets reconfiguration of existing casework to accommodate future equipment finishes upgrade minor ancillary work to increase work flow efficiency
Valuation:
$208,549
Permit #:
CIMP-16567-2018
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building (c) - improvement - interior fit up
2020-12-15
Interior renovation of swim school (goldfish swim school)
Valuation:
$572,013
Permit #:
CIMP-20138-2019
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
County non-residential mechanical permit
2019-07-31
Install 3 returns 1 door louver 1 exhaust fan airtites pipe & insulated flex as needed for diffusers for 1262 sq. ft. tenant fit for people share 1710 underpass road plaza office building suite 204
Valuation:
N/A
Permit #:
2019-02335
Status:
complete
Fee:
$140
Permit Type:
N/A
Building Type:
N/A
County non-residential mechanical permit
2019-07-31
Install 1 ductless air conditioning split system 1710 underpass road plaza office building suite 202
Valuation:
N/A
Permit #:
2019-02332
Status:
complete
Fee:
$140
Permit Type:
N/A
Building Type:
N/A
Building (c) - improvement - interior fit up
2015-01-22
Demolish approximately 100 linear feet of interior partition; remove existing exterior roll up door; building approximately 14 linear feet of exterior wall install new exterior roll up door; building approximately 55 linear feet of new interior partitions install interior doors. replace existing hvac units rework some ducts; move existing electrical panel; relocate and addition electr... see more
Valuation:
$60,000
Permit #:
CIMP-7249-2014
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Commercial renovation of 2036 sq ft of office space for medical office (laboratory corporation of america). permit includes building electrical and mechanical hvac work as shown on the city approved plans. note: use and occupancy is on separate permit
Valuation:
$179,000
Permit #:
CIMP-5481-2014
Status:
final
Fee:
N/A
Permit Type:
Interior fit up
Building Type:
N/A
New finishes and furniture. major items include bathroom upgrades new vanities electrical devices ada guest room upgrades for compliance
Valuation:
$2,800,000
Permit #:
CIMP-20367-2019
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Commercial renovation of minor interior alterations to office and lab space of 5000 sq. ft. permit includes building electrical and mechanical hvac work as shown on the city approved plans. note: use and occupancy requires separate permit
Valuation:
$70,000
Permit #:
CIMP-4953-2014
Status:
final
Fee:
N/A
Permit Type:
Interior fit up
Building Type:
N/A
Commercial building improvement/renovation - interior fit up
2014-01-11
Permit request for interior fit up to include building mechanical hvac and electrical work for newly constructed areas as required for and by the proposed fit up documents and to include request for a certificate of occupancy. - permit is approved with or without additional comment(s) as noted hereon and on the city approved stamped construction documents including attached plan revi... see more
Valuation:
$150,000
Permit #:
CIMP-2025-2012
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Commercial building improvement/renovation - interior fit up
2013-08-07
Permit request for interior fit up for office/research space to include building mechanical hvac and electrical work for newly constructed areas as required for and by the proposed fit up documents and to include request for a certificate of occupancy. - permit is approved with or without additional comment(s) as noted hereon and on the city approved stamped construction documents inc... see more
Valuation:
$333,000
Permit #:
CIMP-1854-2012
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building (c) - improvement - interior fit up
2018-12-11
Expansion of current space to include 834 muddy branch road
Valuation:
$120,000
Permit #:
CIMP-17310-2018
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building (c) - improvement - interior fit up
2017-07-14
Remodel of existing food court space. scope to include update of finishes. no new/changed electric or hvac expected. all original equipment to be placed back in original location
Valuation:
$75,000
Permit #:
CIMP-13704-2017
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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122
BZ Score
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Avg Project
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Projects
117
BZ Score
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Avg Project
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Projects
License # 100269
Gaithersburg, MD
120
BZ Score
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Avg Project
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Projects
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Verified License
BuildZoom confirmed this contractor's license
Timothy Nengel License info
Verified License
| License # | 11753 |
| 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 Timothy Nengel at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 2423 |
| Status | Active |
| City | Annapolis |
| Type | Mech Cont, Master |
- When BuildZoom last verified this license, it had an expiration date of July, 2014. Check the current license status of Timothy Nengel with the The City of Annapolis, MD
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CON-2423 |
| 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 Timothy Nengel at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HM-0000653 |
| Status | Inactive |
| State | Delaware |
| Type | Hvacr |
- According to the State of Delaware, 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 Timothy Nengel at the State of Delaware.
This is a sample of licensing data; click here to access a complete history.
100
BuildZoom Score
51
Permits
- Building permit records show that Timothy Nengel has worked on 51 permitted projects.
Timothy Nengel Employees
TN
Timothy E. Nengel
Applicant
TN
Timothy Nengel
Owner