Foundation with rough-in plumbing before slab pour - Serpa Plumbing, London Ontario

New construction plumbing - London, Ontario

Built properly the first time, from the slab up.

Underground and rough-in through to fixtures for new builds. Steve is on site doing the work - the same licensed plumber who quoted it.

Call (519) 777-5741 Get a Flat-Rate Quote

Mon-Fri, 7:30am - 5pm - same-day answer

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From foundation to final fixtures.

  1. Underground, before the pour

    Drains and stub-outs set and checked while the slab is still open - the stage that is impossible to fix cheaply later.

  2. Rough-in through the frame

    Supply and drainage run through the framing, manifolds set, everything to code and inspected before it is closed in.

  3. Fixtures and finish

    Fixtures set and connected once finishes are in, then the whole system tested at every outlet.

  4. One plumber, start to finish

    Builders and homeowners deal with Steve throughout - flat-rate quoted and warrantied, with no crew handoffs mid-project.

For builders and owner-builds

The plumbing is the part of the build you cannot fix cheaply later

Framing can be adjusted. Finishes can be redone. But the drainage under the slab is set in concrete - literally. New-construction plumbing is about getting the invisible stages right, in the right order, so the build never waits on the plumber and never pays for the same work twice.

The stages, in order

Underground - before the pour

Drains, stub-outs and sleeves set and checked while the foundation is open. Everything above depends on this stage being placed to the drawings, because correcting it after the slab is down means cutting concrete.

Rough-in - through the frame

Supply and drainage run through the framing, manifolds set, shower valves and in-wall carriers placed true. Installed to code and ready for the rough-in inspection before anything closes up.

Finish - fixtures and testing

Once finishes are in, fixtures are set and connected and the whole system is tested at every outlet. The house hands over with full pressure and no surprises on the deficiency list.

Why builders keep one plumber through the build

Handoffs between crews are where placement errors live. On a Serpa build the licensed plumber who priced the drawings is the one on site at underground, at rough-in, and at finish - so the stub-outs land where the walls will be, the schedule holds, and there is one person accountable for the whole system.

Steve has been a licensed plumber since 2009 and works new builds across London and the surrounding communities - custom homes, spec builds and owner-builds alike. Builders get a plumber who reads the drawings before pricing them, flags conflicts while they are still cheap to solve on paper, and treats the inspection schedule as his own deadline rather than someone else's problem.

What the scope includes

A new-build plumbing package covers the full water and drainage system of the house, priced from the drawings as one scope so nothing turns up later as an extra:

  • Underground sanitary and storm drainage, set before the pour
  • Sump pits and drainage connections
  • Supply distribution - manifolds and home runs, or trunk-and-branch to suit the design
  • Drain, waste and vent stacks through the frame
  • Shower valves, tub rough-ins and in-wall carriers placed to the drawings
  • Exterior hose bibs and frost-free sillcocks
  • Fixture setting, connection and full-system testing at finish

Quoted to the drawings, staged with the build

Send the drawings or walk the site and you get a written flat-rate quote staged to the build schedule - underground, rough-in, finish - so the number is fixed before the foundation is poured. Inspections are part of the job, not an extra. And when the same house needs its bathrooms finished to a higher spec, that is the same crew's renovation work.

Call (519) 777-5741

Mon-Fri, 7:30am - 5pm. Same-day answer, flat-rate quote before any work.

The stages, on real sites.

Stage 01

Underground and foundation

Underground drainage laid at an ICF foundation before the slab goes down - the work everything above it depends on.

Stage 02

Slab manifolds and stub-outs

PEX manifolds and stub-outs set on the slab, positioned to the drawings so walls land where the plumbing already is.

Stage 03

Rough-in through framing

Supply and drain runs through new framing - the stage a home inspector sees and the one a homeowner never will again.

Stage 04

Carriers and in-wall work

In-wall toilet carriers and fixture rough-ins set true, so the finished wall hangs on plumbing that was placed correctly.

Real Serpa jobs

New builds and rough-in

Common questions about new construction

Straight answers before you call.

  • Both. Custom builds, spec homes and owner-builds are all regular work, and in every case you are dealing with Steve rather than a rotating crew.
  • Before the slab. Underground drainage and stub-out placement are set at that stage, and getting them right is far cheaper than correcting them afterwards.
  • Work is installed to code and ready for inspection at rough-in and final, which is the standard the whole build is signed off against.
  • Yes - quoted flat-rate before the work starts, staged with the build, and warrantied on completion.

Breaking ground?

Same-Day Answer

Call or send the job and you hear back from Steve the SAME business day - what it likely is, what it likely costs, and when he can come.

Call (519) 777-5741

Replies Mon-Fri, 7:30am - 5pm

Planning the work?

Flat-Rate Quote First

Send the drawings or the scope and get a written flat-rate quote staged to the build. The number you approve is the number you pay.

Get a Flat-Rate Quote

Warranty on all work

Call (519) 777-5741