Updated: Aug 06, 2026
Nyhc plumbing & Mechanical LLC
Nyhc plumbing & Mechanical LLC, 21 Bay St, Islip, NY (Employees: Alexander J Sieligowski, Matthew D Sullivan, and Matthew Sullivan) holds a Home Improvement Contractor license and 2 other licenses according to the Westchester County license board.
Their BuildZoom score of 90 indicates that they are licensed or registered but we do not have additional information about them.
Their license was verified as active when we last checked. If you are thinking of hiring Nyhc plumbing & Mechanical LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Nyhc plumbing & Mechanical LLC Services
Start a project today:
Nyhc plumbing & Mechanical LLC Contact Information
Phone Number: (631) 358-6127
Edit
Address: 21 Bay 3rd Street, Islip, NY 11751
Edit
Do you work for this business? Unlock this free profile to update company info and see who's viewing your profile.
Similar Contractors See more
135
BZ Score
$37.3K
Avg Project
-
Projects
License #
New York, NY
122
BZ Score
$99.8K
Avg Project
-
Projects
122
BZ Score
$91K
Avg Project
-
Projects
Nyhc plumbing & Mechanical LLC Reviews
BuildZoom hasn't received any reviews for Nyhc plumbing & Mechanical LLC. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Let us find you an HVAC pro in your area today
We'll search our vast network of HVAC Pros and connect
you with one that meets your needs today.
Verified License
BuildZoom confirmed this contractor's license
Nyhc plumbing & Mechanical LLC License info
Verified License
| Status | Active |
| County | Westchester County |
| Type | Home Improvement Contractor |
- BuildZoom verified this license was active as of August 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 203466 |
| Status | Active |
| County | Nassau County |
| Type | Home Improvement Contractors |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Nyhc plumbing & Mechanical LLC at the Nassau County Office of Consumer Affairs.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | RP23023 |
| Status | Inactive |
| Town | Town Of Southampton |
- According to the Town of Southampton Department of Land Management, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Nyhc plumbing & Mechanical LLC at the Town of Southampton Department of Land Management.
This is a sample of licensing data; click here to access a complete history.
90
BuildZoom Score
Nyhc plumbing & Mechanical LLC Employees
AS
Alexander J Sieligowski
Member
MS
Matthew D Sullivan
Member
MS
Matthew Sullivan
Licensee
S$
Sullivan Matthew D $