Updated: May 31, 2026
Location and Projects
Address
Boonsboro, MD, 21713
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David N. McIlnay Architect
David N. McIlnay, Boonsboro, MD holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 1 other license 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 David N. McIlnay, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
David N. McIlnay Services
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David N. McIlnay Contact Information
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Install (2) mini split systems (16) radiant heaters exhaust fans and duct work for trucking terminal greenwood motor lines inc r&l carriers
Valuation:
N/A
Permit #:
2019-01016
Status:
complete
Fee:
$1,580
Permit Type:
N/A
Building Type:
N/A
Installing a 3 ton heat pump system with 15 kw electric heat venting 3 bathroom fans 1 range hood
Valuation:
N/A
Permit #:
2019-02956
Status:
complete
Fee:
$132
Permit Type:
N/A
Building Type:
N/A
Install (2) ductless mini split systems vehicle exhaust system radiant heaters exhaust fans and louvers and duct work r&l carriers
Valuation:
N/A
Permit #:
2019-01015
Status:
complete
Fee:
$620
Permit Type:
N/A
Building Type:
N/A
Interior renovations to install 4 rooftop units totaling 31 tons 2 infrared heaters exhaust fans and diffusers with ductwork. sheehy buick gmc
Valuation:
N/A
Permit #:
2022-04032
Status:
complete
Fee:
$620
Permit Type:
N/A
Building Type:
N/A
Non-residential mechanical permit
10320 Auto Place, Hagerstown, Md 21740, Washington County, MD, 67751
2023-05-24
Installing 6 rooftop units totaling 53.5 tons 2 gas unit heaters exhaust fans and diffusers with ductwork. sheehy buick gmc
Valuation:
N/A
Permit #:
2022-04034
Status:
complete
Fee:
$780
Permit Type:
N/A
Building Type:
N/A
Replacing a 3.5 ton air conditioning unit with a 3.5 ton heat pump system to the right of the house
Valuation:
N/A
Permit #:
2022-03549
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installing a 3 ton heat pump system for the first and second floors and installing a 2 ton heat pump system for the third and (4) bathroom fans for converting 154 sq ft of existing living room space and 112 sq ft of existing carport to create a 266 sq ft attached one car garage replace existing 496 sq ft ground-level bathroom and bedroom with new 496 sq ft space to be used as (2) bedr... see more
Valuation:
N/A
Permit #:
2015-05869
Status:
complete
Fee:
$172
Permit Type:
N/A
Building Type:
N/A
Install 3.5 ton heat pump system with 15 kw electric heat (3) bathroom exhaust fans for 2000 sq ft finished space one story single family dwelling on a full unfinished walkout basement jatts enterprises llc. lot 1
Valuation:
N/A
Permit #:
2015-04371
Status:
complete
Fee:
$129
Permit Type:
N/A
Building Type:
N/A
Installation of new 2 ton heat pump system with 10 kw backup electric heat gut interior of existing dwelling install new flooring system partition for two bedrooms full bathroom kitchen and dining/living area all windows and doors are existing new plumbing and electrical wiring electric baseboard heat vinyl siding replacement on exterior and reshingle roof
Valuation:
N/A
Permit #:
2009-04475
Status:
complete
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Mechanical for one story single family modular home model number fi1830 rancher on full unfinished basement with rough in for future bathroom. no garage porches or decks. existing well septic and entrance. removing existing 14x70 single wide mobile home simplified plat b j morgan
Valuation:
N/A
Permit #:
2003-10791
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
4 ton heat pump system with 20 kw heater
Valuation:
N/A
Permit #:
2001-05552
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
1472 sq ft 15kw 3 ton ac-heat pump
Valuation:
N/A
Permit #:
2001-09296
Status:
complete
Fee:
$58
Permit Type:
N/A
Building Type:
N/A
Installing 2 heat pumps and venting
Valuation:
N/A
Permit #:
2002-09529
Status:
complete
Fee:
$52
Permit Type:
N/A
Building Type:
N/A
Town of boonsboro residential mechanical permit
2022-07-07
Replacing air conditioning unit with a heat pump
Valuation:
N/A
Permit #:
2022-03546
Status:
canceled
Fee:
$155
Permit Type:
N/A
Building Type:
N/A
Installing a mitsubishi 2 zone ductless split system for three story guest house. martin motel parceals at prospect hill lots 13-15
Valuation:
N/A
Permit #:
2021-03496
Status:
canceled
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Similar Contractors See more
125
BZ Score
-
Avg Project
-
Projects
127
BZ Score
$42.5K
Avg Project
-
Projects
128
BZ Score
$1
Avg Project
-
Projects
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Verified License
BuildZoom confirmed this contractor's license
David N. McIlnay License info
Verified License
| License # | 16078 |
| 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 David N. McIlnay 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 # | 16078 |
| Status | Active |
| State | Maryland |
| Type | Architects |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for David N. McIlnay at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
13
Permits
- Building permit records show that David N. McIlnay has worked on 13 permitted projects.