Basement waterproofing in East York takes one of two forms, and which one your house can actually have is usually decided by the lot rather than by preference.
Basement waterproofing in East York costs $80 to $150 per linear foot for interior work or $150 to $300 per linear foot for exterior. A full interior drainage system runs $8,000 to $15,000 and a full exterior perimeter $15,000 to $35,000. Which method suits a given property depends on lot access and foundation type.
Access is the whole conversation
East York forms part of the Toronto and East York district, where 54.9% of housing predates 1981. But the number that actually governs a waterproofing quote here is lot width, not building age.
Much of East York is semi-detached and narrow-lot detached housing built between the 1920s and 1950s, frequently with mutual drives — a single shared driveway running between two houses, owned jointly.
A mutual drive is a legal complication as well as a physical one. Excavating along a foundation that fronts a mutual drive affects your neighbour’s access, and in practice that means a conversation and often written agreement before work starts.
The Don Valley and where the water sits
East York is bounded and cut by the Don Valley, and the ravine system pulls groundwater in ways that vary sharply over short distances.
Properties in Todmorden and Broadview North, close to the valley floor, sit substantially nearer the water table than Leaside on the tableland above. The City’s Basement Flooding studies for this area cover the O’Connor Drive and St Clair Avenue East catchment and the Broadview and O’Connor area.
For a house near the valley, drainage is doing real work continuously rather than only during storms — and that changes the case for a battery backup on the sump pump from sensible to necessary.
Leaside is a different problem
Worth separating out, because Leaside behaves unlike the rest of East York. It was planned and built largely in the 1930s and 40s to a consistent standard, on wider lots, with private driveways rather than mutual drives.
That makes exterior waterproofing far more often viable in Leaside than a few kilometres south, and the housing is old enough that original clay weeping tile is well past its service life.
Neighbourhoods we work in
Leaside · Todmorden · Woodbine Heights · Pape Village · Broadview North · O’Connor-Parkview · Crescent Town · Governor’s Bridge
City of Toronto Basement Flooding study areas here
The City has completed environmental assessment studies across 67 areas since 2006 to establish why particular catchments flood. Those covering this part of the city include:
- Area 1 — O’Connor Drive and St Clair Avenue East
- Area 46 — Broadview and O’Connor Drive
- Area 32 — Eastern Beaches
Sitting inside a study area does not entitle you to anything extra, but it does mean the City has already documented capacity problems in your catchment.
Where we work in East York
Where to go next
Where a mutual drive rules out excavation, interior waterproofing does the job without touching the outside of the house.
Near the valley, pump reliability matters more than usual — see sump pump installation.
Both the pump and a backwater valve are partly funded under the City of Toronto flooding subsidy.
For the old city immediately west, see basement waterproofing in Toronto.