Prime Plumbing technician outside a classic three-decker home on a dense street in Somerville, Massachusetts

Somerville, MA · Triple-decker city

Your plumber in Somerville, MA

Somerville is one of the most densely populated cities in New England, and its signature housing is the triple-decker, three-unit wood-frame homes lining street after street. That makes multi-family plumbing the norm here, not the exception. Prime Plumbing handles plumbing, heating, and gas across Somerville's dense neighborhoods. Call (617) 354-4545.

Schedule an Appointment Call (617) 354-4545

Licensed & insuredTriple-decker specialistsGreater Boston

The city where three‑family is the default

Somerville's density is its defining feature, and its housing reflects that. The triple-decker, the three-story, three-unit wood-frame home built by the thousands in the streetcar era, is the classic Somerville building, filling neighborhoods from Winter Hill to Davis Square to East Somerville. Where other towns are mostly single-family homes with the occasional two-family, Somerville is the reverse: multi-family housing is the norm, and a great deal of the plumbing work here is inherently multi-unit.

That changes the whole approach. A triple-decker typically stacks its plumbing, with the same lines running up through all three units and often a single boiler or water heater serving the building. A problem is rarely one household's problem alone, and a repair has to account for how it affects every unit. This is the housing we plan for in Somerville, and the multi-unit thinking it demands is central to the work.

Stacked plumbing, shared systems, and old drain lines

The triple-decker's stacked design concentrates the plumbing realities. A shared drain stack runs the height of the building, so a blockage low in it backs up the units above, and a single shared boiler or hot-water system failing leaves all three units without heat or hot water at once. Staging a repair to isolate the smallest necessary section, so units that need not lose service keep it, is exactly the kind of planning these buildings require, and it is our multi-family plumbing approach.

Add the age of the housing, most of these buildings are a century old or close to it, and the familiar older patterns appear: cast-iron and clay drains that scale and crack, seized shutoffs, and long-serving boilers. In a triple-decker a recurring backup often means the aging shared main rather than one unit's clog, which is why we camera the line rather than cable it on a loop. Our sewer line repair work covers that side.

Multi‑family and residential plumbing for Somerville

For Somerville we handle the full range with multi-unit competence at its center: plumbing repair, drain cleaning and sewer line work, water heater service, heating and boiler work including shared systems, licensed gas piping, and emergency response. For owners and managers of Somerville's many rental triple-deckers, our property management service brings one team across the portfolio.

Prime Plumbing is licensed and insured and holds Massachusetts license #17347. We reach Somerville from our Woburn base for both scheduled and emergency work. To reach us in Somerville, contact us or call (617) 354-4545.

Before you call

Plumbing in Somerville.

Telling us whether it is your unit or the whole building, and what is happening, helps us come prepared.

Do you specialize in triple-decker plumbing?

Yes, and in Somerville it is much of the work, since the triple-decker is the city's signature housing. These buildings stack their plumbing, with shared lines running through all three units and often a single boiler or water heater for the building, so a problem is rarely one household's alone. We bring the multi-unit thinking these buildings demand, planning repairs around how they affect every unit.

The whole building lost hot water. What happened?

In a triple-decker a single shared boiler or water heater commonly serves all three units, so when it fails, every unit loses hot water or heat at once. We service these as the shared systems they are, diagnose the failure, and, on a repair, stage the work to restore service as quickly as possible. It is the defining feature of multi-family plumbing in Somerville.

A low-floor drain backs up when upstairs runs water. Why?

That points to the shared drain stack that runs the height of the building. A blockage low in the stack backs up the units above it, which is why a lower unit floods when an upper one drains. In a century-old triple-decker the cause is often an aging cast-iron or clay main. We camera the stack to find it rather than cabling repeatedly.

Do you work with Somerville landlords and property managers?

Yes. Many Somerville triple-deckers are rentals, and for owners and managers we provide one licensed team across the portfolio, with tenant coordination and documented work. Knowing these buildings, how their stacked plumbing and shared systems run, means faster, more effective service than a plumber seeing the building for the first time.

Ready when you are

Need a plumber in Somerville?

Call our team at (617) 354-4545, or schedule online. Triple-deckers and multi-family are what we do.

Schedule an Appointment (617) 354-4545