Planning a Bathroom Remodel in Greater Boston: Scope, Trades, and the Questions to Ask

Bathroom projects go wrong in a predictable way. It is almost never the tile. It is that two people had different pictures of the job in their heads, or that nobody decided who was calling the plumber.

This article is about preventing both of those. It is written for Greater Boston homeowners, and it is deliberately honest about where one contractor’s work ends and another’s begins.

First, decide which of three projects you are doing

Almost every bathroom job falls into one of three scopes. The whole rest of your planning depends on which one this is.

Scope one: a tile and shower renovation

The layout stays. The toilet, the shower drain and the vanity stay roughly where they are. What changes is what you see and touch: the floor tile, the shower or tub surround, the waterproofing behind it, the niche, the trim.

This is the most common bathroom project and the most contained. It is also the one where the quality difference between contractors is widest, because the most important work — the waterproofing — is invisible once tile goes over it.

Even here, a licensed plumber is usually involved at some point, because fixtures get disconnected and reconnected.

Scope two: a full bathroom renovation

Everything in scope one, plus new fixtures: vanity, toilet, tub or shower unit, lighting, exhaust fan. The layout is mostly unchanged but things get swapped out.

Now you definitely have a licensed plumber, and if lighting or the fan changes, a licensed electrician.

Scope three: a gut remodel

Walls open. The drain moves. The layout changes. Framing may be altered, circuits added, a fan vented where there was not one.

This is a different category of project — more trades, longer, permits and inspections almost certainly in play, and far more that can be discovered behind a wall in an older home.

Why this matters for quotes: if you collect three numbers and they are wildly apart, the first thing to check is not who is cheapest. It is whether all three are quoting the same scope. They usually are not.

The trades, and why more than one person is involved

This surprises homeowners, so it is worth stating plainly.

In Massachusetts, plumbing work and electrical work are licensed trades, governed by their own codes — 248 CMR for plumbing and gas fitting, and 527 CMR 12.00 for electrical. Those licenses are held by individual licensed plumbers and electricians. Separately, contractors who solicit, bid on or perform work on existing owner-occupied residential properties of one to four units must be registered as Home Improvement Contractors.

So a bathroom project nearly always involves multiple licensed people. The arrangements vary:

• A general contractor manages the project and brings the licensed trades under their own coordination. You deal with one point of contact and pay for that coordination.
• A specialty contractor — a tile and flooring contractor, for example — does the tile, waterproofing and finish work, while the licensed plumbing and electrical work is handled separately, either by trades they work alongside or by ones you arrange.

Neither is better. But you need to know which one you have signed up for, because the failure mode in the second arrangement is a homeowner who assumed somebody else was calling the plumber.

Where we fit: we do tile, shower and bathroom floor work — the tiling, the waterproofing system behind it, the floor, the surrounds and the finish details, including heated floor cable under tile. We are not a plumbing or electrical company, so on any job where fixtures move or circuits change, a licensed plumber or electrician does that portion. We will tell you clearly at the estimate which parts of your project are ours and which are not, so nothing falls in the gap between two contractors.

Permits: the honest answer

Homeowners want a yes or no, and the real answer is “it depends, and your town decides.”

Under the Massachusetts State Building Code, ordinary repairs do not require a building permit. A permit is required for work including substantial cutting away of walls or partitions, removal or cutting of structural members, changes to required means of egress, and work affecting mechanical systems or public health and safety. Plumbing and electrical work are administered under their own codes and are typically permitted and inspected separately, pulled by the licensed trade doing the work.

What this tends to mean in practice:

• Re-tiling a shower in the same footprint with no plumbing relocation often does not trigger a building permit.
• Moving a drain, changing the layout, opening walls, or adding circuits generally does.
• Plumbing and electrical permits follow the licensed trade, not the tile contractor.

But municipalities administer this differently, and a town can have requirements that another does not. Call your local building department and describe your actual scope. It is a short call, it is free, and it is the only authoritative answer. Be skeptical of any contractor who tells you confidently that no permit is needed without knowing your town or your scope — and more skeptical of one who suggests avoiding a permit.

The sequence

Order matters more than most homeowners expect, because several steps cannot be undone cheaply.

1. Selections. Tile, fixtures, vanity, trim, glass. All of it decided, and ideally physically on site, before demolition. This is the single biggest schedule protector.
2. Demolition. Old tile, old surround, sometimes the subfloor. In older homes, this is the stage where surprises appear: rot behind a tub, a failed old pan, framing that was never right.
3. Rough work by licensed trades. Any plumbing relocation and electrical changes, while walls are open. Inspections here if permits apply.
4. Substrate. This is the stage that determines whether your shower lasts. Backer board or foam board, a flat and properly sloped shower floor, framing corrections.
5. Waterproofing. A bonded membrane system installed continuously — walls, corners, seams, the drain connection, penetrations. Covered forever once tile goes on.
6. Tile. Floor, walls, niche, benches, edges and profiles.
7. Grout, seal, cure. Grout, then the cure and cleaning schedule the products require. Rushing this is a real failure mode.
8. Fixtures and finish. Plumber sets fixtures, electrician finishes lighting and the fan, glass gets measured and installed — glass is usually measured only after tile is finished, which is why it arrives last.
9. Walkthrough. With the contractor present, in good light.

Steps four and five are the ones you pay for and never see. They are also where the difference between a shower that lasts twenty years and one that fails in three is decided. We go into that in detail in the custom tile shower article, but the headline is that waterproofing comes from a membrane system meeting ANSI A118.10 — not from tile, not from grout, and not from cement board.

Where jobs actually stall

Three things, over and over:

Selections not made. A job stops dead waiting on tile that was ordered late or a vanity on a long lead time. This is almost entirely preventable and almost entirely on the homeowner’s side of the line. Decide early.

Trade scheduling. Each trade needs the previous one finished. A plumber who cannot come until Thursday pushes everything behind them. This is why the coordination question is not bureaucratic — it determines whether somebody is actively managing that chain.

Discoveries behind the wall. Rot, old failed waterproofing, framing that is out of plumb, surprises under the floor. Older Boston housing stock produces these regularly. The way to handle it is not to pretend it will not happen but to agree in advance how changes get priced and approved — in writing, before work starts.

What to settle before anyone quotes

Have answers ready and your quotes will be comparable:

• Which of the three scopes is this?
• Is the layout changing, or is everything staying where it is?
• Tub, shower, or tub-shower combination? Curb or curbless?
• Tile direction: large format, small format, mosaic, natural stone? (This affects labor, not just material cost.)
• Heated floor under the tile, or not? Decide before the floor goes in — it cannot be added later without redoing the floor.
• Who is supplying the fixtures, you or the contractor?
• Who is arranging the plumber and electrician?
• What is the access situation — third-floor walk-up, shared stairwell, parking?

Questions to ask any bathroom contractor

• Which parts of this job do you do yourselves, and which parts need another licensed trade?
• Who is coordinating the trades, and is that in the contract?
• What waterproofing system do you use, by name, and does it meet ANSI A118.10?
• How are shower corners, seams and the drain connection handled?
• Is subfloor or substrate correction included, or extra?
• What happens, and how is it priced, if you open a wall and find rot?
• What is your Home Improvement Contractor registration number?
• What is in writing about change orders?

That HIC question is worth asking every time. Registration is not a measure of craftsmanship, but it is what gives Massachusetts homeowners access to the state’s arbitration program and Guaranty Fund if a dispute goes badly — and a contractor who will not give you the number is answering a different question than the one you asked.

A note on quoted prices

We do not publish bathroom pricing, and you should be cautious of anyone who does without seeing your room. The cost drivers are specific and they compound: scope (the three categories above), tile format and material, the square footage of wall tile versus floor, whether a curbless entry is involved, what the demolition uncovers, access, and how much licensed trade work is required. Two bathrooms of identical size can differ enormously.

What you can do is make the quotes comparable: fix the scope, fix the selections, and ask every contractor to price the same thing. Then the numbers mean something.

If you want the tile and shower portion of your project looked at and explained, request a free estimate — we will walk the room with you and be specific about what is ours and what is not.