Updated: Feb 16, 2026
Location and Projects
Address
177 Buffalo Avenue, Freeport, NY, 11520
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Elm Air Conditioning Corp
Elm Air Conditioning LLC in Freeport, NY delivers professional HVAC installation, repair, and maintenance for residential customers throughout Nassau and Suffolk Counties. As an A+ BBB-accredited HVAC contractor with decades of experience, we specialize in air conditioning installation & repair, heating system installation & repair, and year-round climate comfort solutions tailored to your home’s needs. Our licensed technicians prioritize quality, reliability, and transparent pricing, helping you stay cool in summer and warm in winter with equipment from trusted brands. Schedule service easily online or call to get fast, dependable HVAC support from the team Freeport homeowners trust.
From BuildZoom: Elm Air Conditioning Corp, 177 Buffalo Ave, Freeport, NY (Owned by: Scott Oest) holds a Home Improvement Contractors license and 7 other licenses according to the Nassau County license board.
Their BuildZoom score of 83 does not rank in the top 50% of New York contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Elm Air Conditioning Corp, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Elm Air Conditioning Corp Contact Information
Phone Number: (631) 589-7766
Address: 177 Buffalo Avenue, Freeport, NY 11520
Building Permits by Elm Air Conditioning Corp
This is a sample of this contractor's permits. Click here to access their complete permit history.
Maintain air conditioning unit in side yard
Valuation:
$3,000
Permit #:
201614263
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Maintain air conditioning unit
Valuation:
$3,000
Permit #:
201702436
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install air conditioning unit in side yard
Valuation:
$16,000
Permit #:
201602993
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 2 zone ductless mitsubishi air conditioning unit
Valuation:
$9,900
Permit #:
201503605
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install air conditioning system w/interior & exterior units
Valuation:
$8,000
Permit #:
201501552
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install air conditioning unit
Valuation:
$1,000
Permit #:
201517716
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install air conditioning unit
Valuation:
$1,000
Permit #:
201313740
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install2 air-contioning units in rear yard
Valuation:
$16,000
Permit #:
201402178
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 2 central air conditioning unit system
Valuation:
$17,275
Permit #:
201406763
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install heat pump ( only )
Valuation:
$5,000
Permit #:
201319136
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install split duchess heat pump air conditioning unit
Valuation:
$3,100
Permit #:
200916066
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 3 ductless split air conditioning systems
Valuation:
$10,350
Permit #:
200908058
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 3 ton air conditioning unit
Valuation:
$11,000
Permit #:
200808984
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Elm Air Conditioning Corp Reviews
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Verified License
BuildZoom confirmed this contractor's license
Elm Air Conditioning Corp License info
Verified License
| License # | H0214910000 |
| Status | Active |
| County | Nassau County |
| Type | Home Improvement Contractors |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Elm Air Conditioning Corp at the Nassau County Office of Consumer Affairs.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| Town | Town Of Hempstead |
| Type | Electrician |
- When BuildZoom last verified this license, it had an expiration date of December, 2023. Check the current license status of Elm Air Conditioning Corp with the Town of Hempstead Building Department
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 1202 |
| Status | Active |
| County | Suffolk County |
| Type | Me N/A |
- When BuildZoom last verified this license, it had an expiration date of April, 2014. Check the current license status of Elm Air Conditioning Corp with the Suffolk County Department of Consumer Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 8384 |
| Status | Active |
| County | Suffolk County |
| Type | H H12 - Duct Work |
- When BuildZoom last verified this license, it had an expiration date of October, 2015. Check the current license status of Elm Air Conditioning Corp with the Suffolk County Department of Consumer Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 4849 |
| Status | Active |
| County | Suffolk County |
| Type | Me N/A |
- When BuildZoom last verified this license, it had an expiration date of October, 2015. Check the current license status of Elm Air Conditioning Corp with the Suffolk County Department of Consumer Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 44485 |
| Status | Active |
| County | Suffolk County |
| Type | Rp Rp1 - Hvac |
- When BuildZoom last verified this license, it had an expiration date of October, 2015. Check the current license status of Elm Air Conditioning Corp with the Suffolk County Department of Consumer Affairs
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | H02149100 |
| Status | Inactive |
| County | Nassau County |
| Type | Home Improvement Contractors |
- According to the Nassau County Office of Consumer Affairs, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Elm Air Conditioning Corp at the Nassau County Office of Consumer Affairs.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 2393 |
| Status | Inactive |
| Town | Town Of Hempstead |
| Type | Electrician |
- According to the Town of Hempstead Building Department, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Elm Air Conditioning Corp at the Town of Hempstead Building Department.
This is a sample of licensing data; click here to access a complete history.
83
BuildZoom Score
13
Permits
- Building permit records show that Elm Air Conditioning Corp has worked on 13 permitted projects.
Elm Air Conditioning Corp Employees
FJ
Federer, William R, Jr.
SO
Scott J Oest
Pres
SO
Scott Oest
Owner
WO
Walter Oest
Owner
WJ
William Federer Jr
Owner
WF
William R Federer
Deceased