Service areaCentral Markham
Unionville: Neighbourhood Notes
Unionville mixes 19th-century houses along Main Street with large 1970s and 1980s family homes on curving streets around Toogood Pond. The plumbing varies just as much.
Suburban houses covered in snow under a clear blue sky on a sunny winter day.
- Plumbers who know the pipes under Unionville homes
- Drains, leaks, water heaters and sump pumps handled
- Talked to the shut-off on the phone if water is running
- Call-only: no forms, no call-back queue
- Licensing details confirmed when you call
- Residential
- Commercial
- Markham & York Region
Typical plumbing faults in local homes
- Pinhole leaks in 40-year-old copper, often in basement ceilings.
- Root intrusion in sewer laterals from mature boulevard trees.
- Galvanized fragments in heritage homes, restricting flow.
- Water heaters squeezed into small utility rooms after basement finishing.
- Frozen kitchen lines on outside walls during deep cold.
The houses
The old village core along Main Street Unionville has wooden and brick homes, many over a century old, now used as shops, cafes and residences. Behind them, subdivisions built from the 1970s onward added side-split and two-storey houses on generous lots. Many of these have been updated, but original copper supply lines, cast-iron stacks and older sewer laterals are still common.
Working on heritage properties
Homes in the Unionville Heritage Conservation District have rules about exterior changes. Most plumbing work is inside and unaffected, but a new vent through a roof facing the street, or a relocated gas meter, may need a heritage review. We plan routes that avoid visible changes where we can and point you to the City of Markham for anything that might need approval.
Water and drainage notes
The streets near the Rouge River and Toogood Pond sit low in places. Some basements see more groundwater in spring than homes on higher ground nearby. On these streets, a backed-up sump pump plus a valve in the main drain make good sense.
From the van: If your home predates the 1950s, ask us to check for lead or galvanized pipe at the water meter when we are there for any other job.
Local note. Heritage homes near Main Street often still have cast iron stacks and older clay laterals, which is where roots find a way in.
Getting here
We cover all of Unionville, from Kennedy Road and Highway 7 north past 16th Avenue, and from Warden over to McCowan. Main Street parking can be tight in summer; we plan visits around that.