Part of our plumbing services.
Short answer
Renovation plumbing is decided at rough-in, long before fixtures arrive. Drain locations, vent routing, fall on waste lines and where the water heater sits are fixed at framing and expensive to move later. In older housing, what is found once walls open routinely changes scope. Ask how that gets priced. That last point is the difference between a renovation quote you can rely on and one you cannot.
Original galvanized, mid-century copper and later plastic frequently coexist in the same building, and none of it is visible at quoting time. A proposal worth comparing says what it assumes about the existing system, names what triggers a change order, and states who decides, because on a renovation the surprises are the schedule, not an exception to it.
Jobs this covers
- Kitchen and bathroom remodeling
- Fixture relocation
- New supply and drain piping
- Additions and accessory spaces
- New-home plumbing
- Laundry and utility-room changes
Common problems and warning signs
- A renovation changes the fixture layout
- Old piping should be replaced while walls are open
- A new bathroom or kitchen is planned
- The project needs permit-ready plumbing scope
- Several trades must coordinate
What service may include
Rough-in inspection happens before walls close. Work may include reviewing plans, rough-in plumbing, water and drain connections, venting, fixture installation, inspections, pressure testing and final commissioning.
What affects the recommendation and price
Moving a toilet costs more than moving a sink. Plans, fixture selections, structural constraints, existing piping, permits, finish schedule, change orders and coordination with general, electrical and HVAC contractors drive cost and timing.
What is different around Burlington
Burlington's Permitting & Inspections office issues the building and trade permits for a remodel, and pre-1978 houses bring lead-safe work practices into any job that disturbs paint. Opening old walls also exposes piping that is often older than the fixtures being replaced.
What a written quote should tell you
- What the quote assumes about existing conditions behind the walls
- How discoveries that change the scope are priced, and who authorises them
- Which fixtures are supplied by whom, and when they must be on site
- How the plumbing is sequenced against the other trades and the inspections
- Permits and which inspections must pass before work can be covered up
| Fixed at framing | Why it's expensive to change afterward |
|---|---|
| Drain locations and vent routing | Moving them after walls close means opening them again |
| Water-heater position | Sets the venting and supply runs around it |
Common questions
When should the plumber join a remodel?
Before layout and cabinets are final. Early review can prevent impossible drain routes, inadequate venting and costly changes.
Can I move a toilet anywhere?
Not always. Drain slope, venting, framing and access below the floor can limit relocation.
Who obtains plumbing permits?
Responsibility should be stated in the contract. Licensed trades commonly obtain permits for their scope where required.
Should old pipes be replaced during a remodel?
If questionable piping becomes accessible, replacement may be economical. Condition and project boundaries should be reviewed.
What is a rough-in inspection actually checking?
That the system is correct where it will soon be invisible. The inspector is looking at pipe materials and sizes, drain slope, the venting arrangement, support and fastening, protection where pipes pass through framing, and the results of a pressure or head test held on the system while they watch. Venting is the part homeowners most often get wrong and the part that causes the most trouble later, because an improperly vented drain siphons traps and lets sewer gas into the building. A problem that is invisible on the surface and impossible to fix without opening the wall again.
How do I know if my existing system can support what I am adding?
Three checks, all worth doing before the design is finalised. Drainage and venting: adding a bathroom often means the existing stack and vent cannot serve it, and that can be the largest hidden cost in the project. Supply capacity: an older three-quarter-inch service or partially closed galvanised piping may not deliver adequate flow to a second shower. And water heating: a new bathroom or a large tub can outrun the existing heater. A plumber should assess all three at design stage, and a quote produced without that assessment is provisional.
Can I do my own plumbing in a remodel?
It depends on a specific test, and you need the answer before you open a wall. The Vermont Plumbing Rules apply to all public buildings and to all other buildings connected to a public water or sewage system, and the Division of Fire Safety states that owner-occupied single-family residences not on public water or public sewage systems are not covered.
Its own rule of thumb for a public building is anything other than an owner-occupied single-family dwelling, so a rental or a multi-unit building is in scope regardless of its water source. The rules also state that existing buildings in scope must comply whenever the plumbing is changed, replaced or altered, which is precisely what a remodel does. Call the Division of Fire Safety and your town before demolition. That conversation is free and it decides your budget.
What happens if remodel plumbing is done without a permit?
It surfaces at the worst time: at sale, at refinance, or at a claim. An unpermitted bathroom is a disclosure issue in a Vermont sale and buyers' agents look for it; an insurer can contest a claim arising from unpermitted work; and a later permitted project can be held up until the earlier work is opened up and inspected retroactively. The permit is not the expensive part of a remodel. Undoing finished work to inspect what is behind it is.
When in a remodel does the plumbing happen?
In two visits, and understanding that shapes the schedule. Rough-in happens after framing and before insulation and drywall: supply, drain, waste and vent all set in the walls and floor, then pressure-tested and inspected while everything is visible. Finish happens after the walls, tile and cabinetry are done, when fixtures are set and connected. The gap between them is often weeks, and the rough-in inspection is a hard gate: nothing gets covered until it passes. Fixture selection has to be final before rough-in, because the rough-in locations depend on it.
Who pulls the permits on a remodel: me or the contractor?
Normally the licensed contractor for their own trade, with the general contractor or owner handling the building permit, but it should be written down rather than assumed, because permits falling between parties is a classic remodel failure. Get it stated in the contract: who applies, who schedules inspections, who is present for them, and who provides you the closed permits at completion. Ask for the closed permits as a condition of final payment: that is the leverage point, and it disappears afterwards.
Is remodel plumbing warrantied differently than a repair?
Rough-in plumbing typically carries a longer warranty than fixture installation: some contractors warranty concealed piping for as long as they are in business, since a leak behind a finished wall is so much more expensive to fix later. Get the warranty terms for concealed work and visible fixtures stated separately.
What is the most common mistake in a remodel's plumbing plan?
Finalizing fixture selections after rough-in plumbing is set. Drain and vent locations are built around specific fixture dimensions, and a late fixture change can mean reopening finished walls. Ask for fixture models to be confirmed before the plumber ever shows up.