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Contracting

Bathroom Renovations On Long Island

Bathrooms are mostly plumbing, which is why a Master Plumber should be running the job. NJM handles full bathroom renovations across Nassau and Suffolk County — demo, plumbing, tile and finish, with one licensed team throughout.

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Contracting

Bathroom Renovations Run By A Master Plumber

A bathroom renovation is a plumbing job wearing a contracting hat. Under the tile and the vanity, what you are actually paying for is supply lines, waste lines at the right grade, venting that works, and a shower pan that will not leak in five years. Everything visible sits on top of that, and everything expensive that goes wrong comes from underneath it.

That is the argument for having a Master Plumber run the job rather than a general contractor who brings one in for two days. NJM does bathrooms across Nassau and Suffolk County with the plumbing, the gas where relevant, and the building work all handled by the same licensed team — one schedule, one company accountable, and nobody waiting on the tile setter to finish before the pipes can move.

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

What The Job Involves

Full Bathroom Renovations

Plumbing Rough-In

Supply and waste lines, venting and shut-offs, installed by a licensed Master Plumber. This is the part nobody sees and everything depends on.

Shower Pans & Waterproofing

The single most common source of expensive failure in a bathroom. Done properly rather than quickly.

Layout Changes

Moving a toilet, shower or vanity is a waste-line and venting question before it is a design one. Having the plumber in the room during the design conversation avoids expensive surprises.

Tile & Finishes

Floor and wall tile, vanities, fixtures and trim, finished by the same crew that did the rough-in.

Demolition & Removal

Stripping back to the studs where the scope calls for it, with the property protected properly on the way in and out.

Ventilation

Extraction that actually removes moisture from the building rather than pushing it into the attic, which is where a lot of mould problems begin.

Heating

Radiant floor heating, radiator relocation or extending the existing system — all in-house, since we do the heating too.

Permits & Inspections

Handled as part of the job, not left with you. Which department and which permit applies depends on the jurisdiction — an incorporated village files differently from a hamlet. Tell us the address and we will tell you what the work actually needs.

Contracting — 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.

Estimate visitNo charge

You already know what you want done

A boiler replaced, a bathroom rebuilt, a gas line run. We come out, look at the job and give you a number.

No obligation
Diagnostic visitQuoted on the call

Something has failed and nobody knows why

A licensed technician and the time to find what has actually gone wrong. One rate across plumbing, heating, cooling and gas, and one number to reach us on — there is no separate line to find at midnight. You get the figure before anyone is dispatched, and after-hours, weekend and holiday work is quoted the same way.

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.

Financing provided throughSynchronyCredit is extended by Synchrony. Subject to credit approval.
Call 631-587-0085Not sure which one you need? Call and describe it — we will tell you before we book anything.
The Honest Part

Nobody Knows What Is Behind The Tile Until It Comes Off

Every bathroom quote you get is a quote for the bathroom somebody can see. On a house of any age, what is behind the wall is the part that decides how the project actually goes.

A bathroom is the wettest room in the house and usually the oldest-feeling one. On Long Island housing stock that means a shower that has been running for a very long time against grout which stopped being waterproof somewhere along the way. The damage that causes is invisible until demolition day — soft subfloor under the tub, a joist that has been wet for years, supply piping that looks fine until it is disturbed, or a waste line that was never vented properly and has been getting away with it.

We cannot price what we cannot see, and neither can anybody else. What we can do is be straight with you about it up front rather than presenting a confident number and then producing a change order the moment the tile is off. A quote that does not mention this is not a more accurate quote. It is the same uncertainty with the conversation postponed.

So we handle it two ways. Where we can look before quoting — an access panel, the ceiling below, the basement underneath — we do, because half an hour with a torch answers more than any amount of guessing. And where we genuinely cannot know, we say which specific things we are uncertain about and roughly what each would mean, so that if it turns up you already know what you are looking at instead of hearing it for the first time with your bathroom in pieces.

The other half is who is standing there when it does turn up. A rotted joist under a tub is a building problem, a badly vented waste line is a plumbing problem, and a bathroom renovation that finds both needs somebody who can price and fix them without a second company and a second wait. That is the practical reason our own Master Plumber runs these jobs rather than a subcontractor whose availability we do not control.

Quick Rules Of Thumb

  • Failed grout and old shower pans cause damage nobody can see until demolition
  • Soft subfloor, wet joists and unvented waste lines are the common finds
  • A quote that never mentions the unknowns has not removed them
  • We look first wherever there is an access panel, a ceiling or a basement
  • Where we cannot know, we name what we are unsure about before you sign
  • Finding rot and bad venting on the same day needs one team, not two
Talk It Through — 631-587-0085
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Everything We Handle In Contracting

One licensed team, one number to call, across Nassau and Suffolk County.

Common Questions

Frequently Asked Questions

How can you quote a bathroom without knowing what is behind the tile?

Honestly, nobody can fully — and a quote that does not say so has not removed the uncertainty, it has just postponed the conversation. What we do is look wherever looking is possible before quoting: an access panel, the ceiling in the room below, the basement underneath. That answers most of it. For whatever is genuinely unknowable until demolition we tell you which specific things we are unsure about and roughly what each would mean, so that if it appears you already know what you are looking at rather than hearing it for the first time with the room in pieces.

What do you usually find when the tile comes off?

On an older bathroom, water damage that has been happening quietly for years. Grout and old shower pans stop being waterproof long before anybody notices, so the common finds are soft subfloor around the tub or shower, a joist that has been damp long enough to matter, and waste lines that were never properly vented and have been getting away with it. None of it is unusual and none of it is a disaster — it is just much better to expect it than to be surprised by it.

If you find something, am I stuck with whatever you quote at that point?

That is the fear, and it is a fair one — it is the single most common bad experience people have with bathroom work. The protection is having named the risks before you signed, so the conversation on the day is about something you were already told about rather than something new. And because the plumbing and the building are both our own team, a rotted joist and a badly vented waste line get priced and fixed by the same people rather than needing a second company, a second quote and a second wait.

Is it worth renovating a bathroom that mostly works?

Sometimes not, and we will say so. If the layout suits you and the only real complaint is that it looks dated, then refinishing, re-grouting, new fittings and a proper job on the waterproofing gets a long way for a fraction of a full renovation. Where it stops being worth patching is when there is movement in the floor, staining on the ceiling below, or a shower that has clearly been leaking — at that point you are paying to cover up a problem rather than fix it, and it will still be there.

Why does it matter that a Master Plumber runs the job?

Because most of the cost and nearly all of the risk in a bathroom is plumbing. Waste line grade, venting and waterproofing decide whether the room works in ten years, and none of them are visible when the job is finished. A general contractor bringing a plumber in for two days is coordinating that work; we are doing it.

Can I move the toilet or shower?

Usually, but it is a waste-line and venting question rather than a design one. Waste needs the right fall, and fixtures need venting, so where things can go depends on the joists, the stack position and the floor construction. We would rather have that conversation while it is still a drawing than after demolition.

How long does a bathroom renovation take?

It depends on the scope, what is found behind the walls, and material lead times. We will give you a realistic schedule after seeing the room rather than a number designed to win the job. What we can say is that having the plumbing in-house removes the waiting-on-another-trade delays that stretch most bathroom jobs.

What usually goes wrong in a bathroom renovation?

Waterproofing, almost always. A shower pan or wall assembly that was not detailed properly does not leak immediately — it leaks slowly into the structure and shows up as a stain on a ceiling a year or two later. That is the part worth paying attention to and the part that is invisible when you are choosing tile.

Do you handle the permits?

Yes. We apply for the permits the work requires and see the inspections through, across both Town and Village jurisdictions.

Can you add heated floors?

Yes, and a bathroom renovation is exactly the right moment — the floor is already open. For a single bathroom, electric under-tile heating is usually the sensible choice. We do both electric and hydronic radiant in-house.

Do you offer financing?

Yes. A full bathroom renovation is a planned expense for most people, and financing lets it happen on your timetable. We finance through Synchrony, subject to credit approval. Ask when you call and we will go through the options.

Are estimates free?

Yes, free and with no obligation. For a renovation we will want to see the room before quoting, because an estimate given without looking is a guess. Call 631-587-0085, or use the form 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.

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Proudly serving all of Nassau and Suffolk County, with deep local roots near our North Babylon home base.

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What Long Island Says

Reviews From Homes & Businesses We've Served

5 out of 5 stars

Called Neil on the spur of the moment on a Saturday afternoon because my bathroom sink backed up and when I plunged it nothing but black water came up. I really opened up Pandora's box. Neil was able to come same day and fix the problem. Glad I had his number handy.

Patricia NollJune 2026
Reviewed on Google

5 out of 5 stars

Bathroom remodel was completed to my complete satisfaction. Family & Friends enjoy experiencing their spa like bathroom grooming. Contractor was personable, professional, friendly, patient and knowledgeable.

Shirley KendallOctober 2024
Reviewed on Google

5 out of 5 stars

Our experience with NJM mechanical and contracting company was excellent. Neil fixed our shower leak. He was efficient and personable. We would highly recommend using them. Thank you Neil.

Linda LevinsonJanuary 2024
Reviewed on Google

Read all 87 reviews from Google and Housecall Pro →

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