What a basement waterproofing quote should itemize

Basement waterproofing in the GTA gets priced per linear foot of wall, with published rates spanning $50 to $475 per linear foot based on the product sold. Project Landscaping's three tiers put interior drainage at roughly $50 to $180 per linear foot. Nusite Group lists exterior excavation and membrane at $150 to $300 per linear foot, and OCM Excavation lists it at $250 to $475 per linear foot. Each figure comes from a Canadian company's actual 2026 GTA pricing.

Whole project totals spread just as far. Nusite places a full foundation perimeter at $15,000 to $35,000. OCM prices a complete four wall wrap on a standard detached home at $25,000 to $55,000. DryShield sets a typical GTA whole basement interior job at $3,500 to $15,000 and above.

A homeowner with three lump sums in hand has no way to tell which of these products is being proposed. A homeowner with three itemised quotes in hand does. What follows is the list of lines to insist on.

Depth works as the multiplier for exterior jobs, not area. OCM Excavation goes down to the base of the footing, 7 to 9 feet under most homes in the GTA, and charges $250 to $400 per linear foot for a 7 foot basement compared with $300 to $475 for an 8 foot basement, which applies to most Toronto bungalows from the 1960s onward.

That one foot is what separates two quotes that both claim to be exterior waterproofing. Request the depth in writing. A quote that omits it has not agreed to the work it will uncover.

Interior and exterior are separate products with separate price tags, and that split drives the biggest difference in any quote. Interior handles water once it has entered the wall. Exterior keeps it from ever getting there.

Project Landscaping splits its interior work into three levels: a basic interior drain with a trench, weeping tile and a sump connection at $50 to $80 per linear foot; a complete perimeter setup with drainage membrane at $70 to $120; and a top-tier system with a backup pump at $100 to $180. Choose the premium level only if losing power in a storm would truly flood your space.

Next, ask about the number of walls. For a standard 30 foot wall on a Toronto semi, OCM Excavation quotes $8,500 to $13,500 complete, which takes in excavation, hauling, parging, membrane, drainage board, new weeping tile and backfill, while doing all four walls runs $25,000 to $55,000. Water typically gets in on one side, and most homeowners who have a single wet corner excavate just that corner.

Perimeter length converts the rate into the full amount. Project Landscaping states that most Ontario homes sit on foundation perimeters of 100 to 150 linear feet, so request that each contractor multiply their own rate by your own measured perimeter and quote the figure before and after HST.

OCM Excavation lists $90 to $140 per linear foot for new 4 inch perforated PVC weeping tile bedded on clear stone with a filter sock, shown as a line within the exterior scope. Reusing drainage that is still sound costs less than replacing it, and summary quotes do not always tell the two apart.

This same line resolves the lower-cost question. When the drain is blocked or broken but the foundation wall remains intact, the $90 to $140 per linear foot that OCM charges for work inside an open trench is what you need, rather than the $250 to $475 package that includes the full membrane and parging.

A drainage setup works no better than the place its water ends up. Rock Basements lists a standalone sump pump install, including pump, basin and discharge, at $2,200 to $3,000. OCM lists a sump pit and pump at $2,500 to $4,500 for an exterior job that requires digging a new pit and cutting the weeping tile away from the sanitary sewer.

That severance is mandatory in Toronto. OCM says a weeping tile that currently drains into the sanitary sewer breaks Toronto's by law, and fixing it requires installing the pit and pump. It is also the job the City's $400 foundation drain severance subsidy targets.

A quote without the pit will seem less expensive than one with it by the $2,500 to $4,500 that OCM prices the line at, but only until the crew opens the ground.

OCM points out that Old Toronto properties with 4 foot side yards have no room for a mini excavator, so hand digging becomes necessary. For weeping tile work, the hand dig surcharge runs $50 to $100 per linear foot, charged over the whole length instead of only the narrow part.

If the only thing standing between a mini excavator and the rear wall is a fence panel or a gate post, taking that out costs much less than paying the extra charge along the entire wall. Check which access assumption the quote depends on.

Decks, air conditioning units and gas meters located along the trench path must be removed and later reinstalled. OCM lists this cost at $500 to $2,500 based on what obstructs the work. Any item you are permitted to relocate beforehand lowers that amount, but gas and electrical tasks remain with a licensed trade.

OCM puts back grade and rough topsoil but prices final sod, interlock reset and plantings as separate line items. Sod, interlock, gardens and irrigation lines all need to be restored after an exterior dig, and two quotes will answer differently on whether they sit inside the number unless you ask.

Two further lines fit this discussion because they are safety requirements, not choices. OCM's process notes utility location through Ontario One Call, hand exposing gas and hydro within 1 metre of the wall, and excavating with a safe slope or shoring per OHSA. A quote that omits locates and shoring is not a lower price, it is a dangerous one. OCM also notes that excavating below an underpinning bench needs engineered shoring, which is an engineering cost rather than a per linear foot one.

Before anything else, decide if the work calls for a system in the first place. Nusite Group quotes professional crack injection as a local repair at $300 to $800 per crack, far below the $15,000 to $35,000 it quotes for a complete perimeter exterior job.

Published GTA quotes for the same repair run very far apart, and that range is the point. Nusite lists $300 to $800 per crack, Gamcon lists $400 to $800, DryShield publishes $750 to $1,000 for polyurethane injection and $750 to $1,500 for epoxy, and Aquatech Waterproofing publishes $1,500 to $3,000 for foundation crack repair. Leaquida Waterproofing sets $1,500 to $2,200 for one simple, reachable leaking vertical crack. Ontario Foundations prices a full call covering one to three cracks at $800 to $3,500. Read any single published figure as one company's list price, not a market rate.

A single crack that leaks in a wall that is otherwise solid should be injected before anything else. If a contractor suggests full excavation, they need to show you failed weeping tile or wall failure across a wide area, not just one crack.

HST comes first. Ontario applies 13 per cent and residential waterproofing work is taxed. Nearly every per linear foot price that GTA contractors publish is stated before tax, so a $25,000 exterior job runs about $28,250 after HST.

The warranty comes second, and you should get it on paper because the published terms vary. Aquatech Waterproofing says it provides a lifetime warranty and adds that exterior waterproofing may hold up for 25 years or longer. DryShield promotes a lifetime warranty that can be transferred. OCM Excavation states every job includes a written workmanship warranty but gives no published term. Nusite points out that interior weeping tile systems typically endure for 15 to 20 years. Obtain the term, the transferability and the exclusions in writing, not in discussion. A transferable warranty carries real value when you sell, and requesting one adds no cost.

One timing note. Exterior work requires open ground, which makes it a spring to late fall job in the GTA. Interior work can be done year round.

WaterproofingIndex names 384 companies across 59 Toronto and GTA areas, with 225 of those listed for basement waterproofing. The index logs a phone number for 380 of the 384 and a website for 368, enough to ask for three written quotes on the same scope.

It lists no prices. Every number on this page is drawn from a specific Canadian source page, not from the index itself, and the index has never gathered a quote. It also lists no warranty conditions, no completion records and no licence standing, three of the items this page advises you to request. Those are supplied by the contractor in writing, and in Toronto the licence is verifiable through the City's Business Licence Lookup.