Concrete foundations across Toronto and the GTA
WSIB cleared|$5M liability insured
WSIB cleared|$5M liability insured

Underpinning and walkouts

Basement walkout construction in Toronto

A walkout gives your basement its own door to the yard.

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Prefer to talk? Call (416) 785-7838

Why GSS

Why homeowners and builders choose GSS

01

Your schedule stays on track

We own our forming system, so your pour never waits on a rental yard or another crew’s calendar.

02

One company, footing to roof

Concrete and framing under one contract. No gap between trades, and no arguing over walls that are out of square.

03

Built right, inspected at every stage

Built to your engineered drawings. Footings are inspected before every pour, and underpinning follows the engineer’s sequence.

04

You’re covered on every job

WSIB cleared with $5 million in liability insurance. Certificates on request, before we start.

A walkout gives your basement its own door to the yard. We cut the opening, build the footings and stairwell walls, and waterproof it, to the engineer’s design and the City permit.

Our own forms

No waiting on rental stock or another crew

Pour date in writing

The date we give you is the date we pour

WSIB cleared

Clearance certificate on request

Fully insured

$5 million liability insurance on every job

What a walkout includes

The opening

We cut the new door opening in the foundation wall and set the beam or lintel the engineer specifies above it.

Footings

New footings under the stairwell walls, dug to the depth on the drawings and inspected before the pour.

Stairwell walls

Poured concrete walls that hold the soil back on both sides of the stairs, formed with our own forms.

Waterproofing and drainage

Waterproofing on the new walls, weeping tile, and a drain at the bottom of the stairwell so water has somewhere to go.

With underpinning

Lowering the basement at the same time? We plan the walkout into the same underpinning sequence, so you dig once.

Inspections

We book the inspections the permit calls for and build in the order the engineer sets.

Walkout or walk-up?

A walkout opens at the basement floor level onto a lower yard. A walk-up is a stairwell from the basement up to the yard. Both need an opening in the foundation wall, footings and retaining walls, and both need a building permit in Toronto.

Which one fits depends on your lot grade, the setbacks and what the basement will be used for. Your designer settles that on the drawings; we build it. Read more in our guide: What is a walkout basement?

How a walkout gets built

  1. The engineer designs the opening, footings and walls, and the permit is issued.
  2. We dig the stairwell and support the existing wall as the engineer specifies.
  3. Footings are formed, inspected and poured.
  4. Stairwell walls are formed and poured, and the opening is cut and finished.
  5. Waterproofing, weeping tile and the stairwell drain go in before backfill.

Recent work

Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services
Underpinning and walkouts by Grand Structural Services

Planning a walkout? Send the drawings and we’ll reply the same day.

Questions we get asked

Yes. A new basement entrance needs a building permit, and the design usually needs an engineer. We build to the approved drawings.

Yes, and it’s usually the most efficient way: one dig, one engineer’s sequence, one schedule.

Waterproofing on the new walls, weeping tile, and a drain at the bottom of the stairwell, all built before backfill.

No. We build the structure: opening, footings, walls, waterproofing and drainage. Your general contractor or finisher handles doors and finishes.

Part of our underpinning and basement lowering service.

Have walkout drawings?

Send them over. We’ll price the walkout, and the underpinning if you’re lowering too, on one schedule.