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Service Area · Markham, ON

Plumber in Markham.

Basement bathrooms, ensuites, kitchen rough-ins and custom plumbing for Markham's newer subdivisions and established streets. Two licensed plumbers, 10+ years, clean installs.

Call 647-402-4825 Get a free quote
Seal Plumbing licensed plumber roughing in a basement bathroom in a Markham home

Basement-finishing country. We're the first trade in.

Markham built out fast — Berczy, Cornell, Wismer and Greensborough went up within a couple of decades, and nearly every one of those homes came with an unfinished basement. Finishing them is Markham's favourite renovation, and every good basement starts with the plumbing rough-in: bathroom drainage, wet bar lines, sometimes a full second-suite kitchen.

Seal Plumbing is Pete and Joseph, two licensed plumbers who do the work personally. Written quote before we start, tidy site while we're there, and a rough-in your framer and finisher can build around with confidence.

What we do in Markham

  • Basement bathrooms & renovations
  • Ensuite installations
  • Kitchen plumbing & rough-ins
  • Custom residential plumbing
  • Commercial rough-ins & fit-outs
  • Repairs, drain snaking & camera inspections

What Markham homes ask of a plumber

Newer subdivisions, basement projects and multigenerational households drive Markham's plumbing work.

Basements going from bare to built

Most Markham basements were handed over unfinished. We rough in bathrooms, wet bars and laundry lines as the first trade in, to Ontario code.

Multigenerational living

In-law suites with full kitchens and bathrooms are a Markham staple. We plumb complete second units, ejector systems included, planned for real daily use.

Upgrading builder-grade bathrooms

The original builder bathrooms in Berczy or Wismer are now 20 years old. We gut and rebuild them properly — supply, drains and fixtures aligned to the new layout.

Plumbing services we offer in Markham

The full Seal Plumbing range, across every Markham community.

Basement Bathrooms→ Ensuite Installations→ Kitchen Rough-Ins→ Custom Residential→ Commercial Plumbing→ Repairs, Drains & Camera→

Markham areas we serve

From Thornhill to Cornell, we cover all of Markham.

UnionvilleThornhillMillikenMarkham VillageBerczyCornellWismerGreensboroughCachetAngus GlenBox GroveButtonville

Also serving nearby: Richmond Hill, Scarborough and Stouffville.

Markham plumbing FAQs

Yes — it's our most common Markham job. We locate or cut in the drainage, set the rough-in to your layout, and take it through to finished fixtures if you want the full scope.
We do. Complete basement kitchens and bathrooms for multigenerational households, done to Ontario plumbing code with proper venting and ejector pumps where needed.
Usually, yes — the bones are fine but the fixtures and layouts date fast. We rebuild them with re-planned supply and drainage so the new bathroom outlasts the old one.
Small jobs are often quoted same-day. Basement and ensuite builds usually take 24 to 48 hours once we've seen the space.

Need a plumber in Markham?

Finishing a basement or upgrading a bathroom in Markham? Call Pete or send a few details for a straight quote.

Call 647-402-4825 Get a free quote