Plumbing installation in Londonderry, NH covers new fixtures, new supply and drain lines, and the plumbing for additions and new construction. It is planned work, so you can schedule it around your project. A clear price comes first, and same-day appointments are available when the schedule allows.
Tell us what you are building or replacing when you call (603) 815-9179. A new bathroom, a kitchen remodel, a basement bath and an outdoor spigot all need different pipe sizes, vents and access. We confirm those details before we quote.
What we install
Sinks and faucets
Kitchen, bathroom, utility and bar sinks, with new shutoff valves and supply lines.
Toilets and bidet seats
Removal of the old toilet, flange check and installation of the new one. See toilet repair.
Showers and tubs
Valve rough-in, trim kits, drains and diverters.
Water heaters
Tank and tankless units. See water heater installation.
Washer and dishwasher hookups
Supply valves, drain boxes and hoses.
Outdoor spigots
Frost-proof hose bibs and shutoffs that drain in winter.
We install what you have chosen or help you pick fixtures that fit your space and water supply. We do not install fixtures that cannot meet the rough-in or the drain size.
New construction plumbing: rough-in, inspection, finish
Plumbing a new home or addition happens in stages. The rough-in comes first, before walls close. The finish comes after, when fixtures go in.
- LayoutWe read the plans, place drains, vents and supply lines, and flag anything that conflicts with framing.
- Rough-inWe run drain, vent and supply pipe through the framing and install tub and shower valves.
- Pressure and leak testsWe test the lines before insulation and drywall cover them.
- InspectionNew lines and moved fixtures may involve a permit and an inspection, which the town's Building and Zoning Enforcement office (603-432-1100, extension 440) can walk you through. We coordinate our work around the inspection.
- FinishWe set fixtures, connect appliances and test every drain and supply.
Large developments such as Woodmont Commons, the 600-acre mixed-use project in town, are planned and built by their own contractors. We handle individual homes, additions and remodels.
Planning before you call
A few details speed up an accurate quote. Gather them before you call, and we will ask for the rest.
- Which fixtures you want, and whether you have bought them.
- Where the new fixture sits compared with existing pipes.
- Whether the room is above a basement, crawlspace or slab.
- Town water or a private well, and town sewer or septic.
- Your timeline, including any inspection date.
If the new fixture ends in a drain that has been slow, run it through our drain cleaning crew first. Installing a new sink on a partly blocked line only hides the problem.
Water supply and drain connections
New plumbing is only as good as the supply behind it. If your house is on a private well, the pressure tank and pump set the pressure at every fixture. If you are on town water, a regulator may limit it. We check pressure with a gauge at a hose spigot before we add load.
Drains must slope, vent and connect to a line that can carry the added flow. A basement bathroom often needs a sewage ejector pump if the drain sits below the main line. We explain whether your project needs one and how it works.
| Project | Typical extras to expect |
|---|---|
| Basement bathroom | Ejector pit or pump, vent routing, floor cutting |
| Kitchen remodel | Moved sink drain, dishwasher hookup, disposal |
| New outdoor spigot | Frost-proof body, interior shutoff |
| Addition | New branch lines, vent through the roof, pressure test |
What installation costs
New fixtures and lines are priced before we order parts or open a wall. Cost depends on:
- The fixture type and brand you choose.
- Distance from existing supply and drain lines.
- Access through floors, walls and crawlspaces.
- Whether a pump, a vent or an electrician is needed.
- Whether permits or inspections add scheduling time.
Insurance does not pay for new installations. Call (603) 815-9179 with your project and we will price it.
Installations across Londonderry and nearby towns
We install plumbing across Londonderry, from North Londonderry and Wilson to homes off NH 102 and NH 128. We also serve Derry, Windham, Hudson and Litchfield.
If the new line needs to tie in a whole-house replacement, our repiping page covers that, and commercial plumbing covers shops and offices.
New fixtures, supply lines and drains are installed to the International Plumbing Code (IPC) in the New Hampshire State Building Code, and the inspector checks that standard.
Questions we hear in Londonderry
Yes, as long as they are in good condition and fit the rough-in. We check them before we start.
Possibly. Call the town's Building and Zoning Enforcement office on 603-432-1100, extension 440, before work starts.
Often yes. If the drain sits below the main line, a sewage ejector pump may be needed. We confirm that when we see the space.
A single fixture is usually a few hours. A new bathroom takes days because of rough-in and finish stages.
It can. Pressure comes from the well pump and tank, and sediment affects fixtures. We check pressure before we add load.
Yes. We install a frost-proof hose bib with an interior shutoff so it drains in winter.