Basement Renovations in Etobicoke

A finished basement is the cheapest square footage you will ever add to an Etobicoke house — provided the water is dealt with first. We do not frame a basement until we know why it is dry and that it will stay that way.

What we do

Moisture assessment and interior or exterior waterproofing
Underpinning and bench footing for ceiling height
Legal secondary suites built to Ontario Building Code
Egress windows, fire separation and interconnected alarms
Continuous rigid or spray foam insulation detailing
Insulated subfloor systems
Basement bathrooms, wet bars, gyms and home theatres

Water first, everything else second

Finishing over a basement that takes water is the most expensive mistake in residential renovation, because the damage is hidden until the framing and insulation are already ruined. Before any design work we look for efflorescence, staining, cracks, the condition of the weeping tile if known, and how the lot grades away from the foundation.

The fix is often simple — extending downspouts, correcting negative grading, sealing a window well. Sometimes it is interior waterproofing with a drainage membrane and sump, or exterior excavation and membrane. We would rather tell you the basement needs three thousand dollars of drainage work before we start than build over it and be back in two years.

Ceiling height, egress and legal suites

Two things decide whether a basement can become a legal secondary suite: ceiling height and egress. The Ontario Building Code sets minimum clear heights, and many older Etobicoke houses fall short. Underpinning or bench footing can gain the height, but both are significant structural work requiring engineered drawings and a permit.

A legal suite also needs a compliant egress window in every bedroom, fire separation between units, interconnected smoke and carbon monoxide alarms, and separate heating and ventilation provisions. A suite that is not legal is not insurable and can be ordered closed — the gap between "finished basement" and "legal second unit" is substantial and worth understanding before you commit.

Insulation, vapour and comfort

Basement walls need a continuous insulation and vapour strategy that does not trap moisture inside the assembly. Fibreglass batts against bare concrete with poly over them is the classic older detail and the classic mould problem. We use rigid foam or spray foam in direct contact with the foundation wall so the concrete never meets warm interior air at a condensing surface.

Under the slab, a subfloor panel system or rigid insulation makes the difference between a room that reads as a basement and one that does not. Cold floors are what most people are actually reacting to when they say a basement feels unfinished.

Making it feel like part of the house

The details that stop a basement feeling like a basement are mostly about light and ceiling height: enlarged windows where the grading allows, a lighting plan with several layers rather than a grid of pot lights, and running services in soffits so the majority of the ceiling stays at full height.

We also plan for what the space becomes later. Roughing in a bathroom drain, a wet bar supply, or conduit for future circuits during construction costs a fraction of adding them once the slab is finished and the walls are closed.

Common questions

Can my basement become a legal apartment?

It depends primarily on ceiling height, whether compliant egress windows can be installed, and whether the required fire separations and alarm systems can be built. We assess all three on the first visit. Where height is the constraint, underpinning or bench footing can solve it, but that is structural work with engineering and permit costs attached.

My basement is dry. Do I still need waterproofing?

Not necessarily — but we need to understand why it is dry before covering the walls. A basement that stays dry because of good grading and functioning downspouts is genuinely fine. One that is dry because it has not rained hard recently is not. The assessment costs nothing at quote stage and is the most valuable half hour of the project.

How long does finishing a basement take?

A straightforward finish of a dry, adequate-height basement is typically six to ten weeks. Adding a bathroom, underpinning, or building a legal suite extends that considerably — underpinning alone is usually several weeks of structural work before finishing begins.

Get a written quote

We visit, measure, and give you a fixed-price quote itemised by trade. No obligation.

Call (416) 570-7214 Request a quote