Commercial Plumbing
Offices, warehouses, restaurants and retail along the Deer Park commercial corridor. Installations, repairs and emergency response.
NJM Mechanical & Contracting
Plumbing, Heating & Cooling In Deer Park
Deer Park mixes residential streets with a large commercial and industrial corridor, which means we are as likely to be on a rooftop unit here as under a kitchen sink. Both are our own licensed crew.
RESIDENTIAL & COMMERCIALROOFTOP UNITS24/7 EMERGENCYLICENSED
Licensed & Insured
Master Plumber
TASK 86/87 Certified
Navien NSS Certified
22+ YEARS ON LONG ISLANDGet Your Free Estimate
LICENSED & INSURED · NASSAU & SUFFOLK
PLUMBING · HEATING · COOLING · CONTRACTING
Have An Emergency? We’re Available 24/7.
631-587-0085WE ANSWER EVERY CALLDeer Park
Residential & Commercial Plumbing, Heating & Cooling In Deer Park
Deer Park is the second largest hamlet in the Town of Babylon, and it is split in a way most of our service area is not: residential streets on one side, and a substantial commercial and industrial corridor on the other. We work both. On any given week we are as likely to be on a rooftop unit behind a Deer Park warehouse as under a kitchen sink.
That matters when you are a business here, because commercial mechanical work usually means dealing with a company that does only commercial, or a residential outfit stretching beyond what it is set up for. NJM is licensed and insured for both, with the same crew and the same 24/7 response, and we schedule commercial work around trading hours where the job allows.
24/7 Emergency ServiceLicensed & Insured
Master PlumberLicensed to pull permits
TASK 86/87Certified for gas work
Navien NSSFactory-trained on tankless
22+ years on Long Island · Plumbing, heating, cooling, gas and contracting under one roof
Before you call
Two kinds of visit. You’ll know which before we come.
We don’t charge to quote a job. We do charge to find a problem nobody has identified yet. Which one you need — and what it costs — gets agreed on the phone, so nothing about the cost is a surprise on the doorstep.
The rate you are told is the rate
You get the number on the phone, before anyone is dispatched, and it is what you are charged when the technician arrives. One rate across all four trades — plumbing, heating, cooling and gas.
What it pays for
A licensed, insured technician carrying the certifications the work needs, and the time to find what has actually failed — not a quick look and a guess.
Watch for the bait and switch
A call-out advertised at almost nothing gets recovered once someone is standing in your basement. Get the number before anyone travels — from us, or from anyone else you call — and hold them to it when they arrive.
Financing on larger jobs
A boiler that fails in January is not a purchase anyone planned. Financing is available on the big-ticket work, so a system replacement does not have to come out of savings in one go.
What it is normally used for
Boiler, furnace and water heater replacement, a full air conditioning system, a whole-house repipe, sewer and water main work, and larger contracting jobs — kitchens, bathrooms, dormers and extensions.
When to bring it up
At the estimate, before anything is scheduled. It is worth asking even if you think you will not need it, because knowing it is there changes what you are willing to consider fixing properly.
What it does not change
The price of the job. The quote is the quote whether you finance it or not — and on a straightforward repair it is usually not worth the paperwork. We will tell you which one you are looking at.
Call 631-587-0085Not sure which one you need? Call and describe it — we will tell you before we book anything.
What We Do Here
Services In Deer Park
Rooftop Units & Commercial Cooling
Rooftop package units and split systems installed, serviced and repaired, with emergency cover for the days a failure would close you.
Commercial Heating
Heating plant and distribution for Deer Park businesses, serviced on a schedule that suits the operation rather than interrupting it.
Residential Plumbing
The full range for Deer Park homes — leaks, clogs, water heaters, repipes and fixture work, with a licensed Master Plumber on staff.
Home Heating & Cooling
Boilers, furnaces, central air and ductless mini-splits installed and repaired for houses across the hamlet.
Gas Lines & Inspections
TASK 86/87 certified gas work for both residential and commercial premises, including pressure testing and code compliance.
Renovations & Build-Outs
Kitchens and bathrooms for homes, and commercial build-outs where the plumbing, gas and HVAC are handled by the same licensed team.
24/7 Emergency Service
Round the clock, every day. A commercial failure overnight is exactly the call we are set up to take.
Current Offers
Money Off, Plainly Stated
What it says on the coupon is what comes off the bill. Mention it when you call.
Common Questions
Frequently Asked Questions
Do you handle commercial properties in Deer Park?
Yes — offices, warehouses, restaurants and retail across the commercial and industrial corridor. Commercial work gets the same licensed crew and the same 24/7 response as our residential work, scheduled around your operating hours where the job allows.
Can you service rooftop units?
Yes. Rooftop package units and commercial split systems, installed, maintained and repaired. If a unit fails overnight and it would close you in the morning, that is the call we are set up to take.
Who issues permits in Deer Park?
Deer Park is a hamlet within the Town of Babylon, so permits go through the Town rather than a village building department. We handle the application and inspections as part of the job.
Do you offer maintenance agreements for businesses?
Call 631-587-0085 and we will talk through what your equipment and operating hours actually need. Preventive service on commercial cooling in particular tends to cost far less than the emergency call it avoids in July.
How far is Deer Park from your shop?
A few minutes. We are at 31 Magro Drive in North Babylon, the neighbouring hamlet in the same town.
Are estimates free?
Yes, free and with no obligation, for residential and commercial work alike. Call 631-587-0085, or use the form on this page and we will be in touch within 24 hours.
Service Area
Proudly Serving Long Island and Surrounding Areas.
Based in North Babylon, working across both counties — close enough to get there fast, local enough to know the housing stock and the permit offices.
Find Service Near You!
- Long Island
- Nassau County
- Suffolk County
Towns We Serve
Proudly serving all of Nassau and Suffolk County, with deep local roots near our North Babylon home base.
Get A Free EstimateWhat Long Island Says
Reviews From Homes & Businesses We've Served
5 out of 5 stars
The experience I had with with NJM Mechanical & Contracting was a pleasant one. I had the pleasure of doing business with Neil. The work I had done was a basement entrance to my yard and it came out wonderful. The work performed as well as the communication is 10/10.
Nick UrziaJune 2026
5 out of 5 stars
Neil has handled all my A/C needs over the years. He's very communicative and open about service charges. He never steers you wrong
Jim JacksonMay 2026
5 out of 5 stars
As always, Neil is a pleasure to have as my plumber. He is so professional and knowledgeable. I wouldn't use anyone else! I highly, highly recommend him.
Fritzi R.May 2026
Need A Licensed Plumber In Deer Park?
Free estimates with no obligation, 24/7 emergency response, and 22+ years serving homes and businesses across Nassau and Suffolk County.