Service · Basement Transformation
Basement Renovations & Finishing in Toronto & the GTA
A finished basement is the cheapest square footage you will ever add. We turn cold, unused space into the room your family actually fights over — or into a legal suite that pays part of your mortgage.
What is included
Everything this project needs, under one contract
Moisture & waterproofing
We diagnose the water path first — interior or exterior — before framing anything.
Legal secondary suites
Egress windows, fire separation, ceiling height and permits handled end to end.
Soundproofing
Resilient channel, insulation and sealed penetrations so upstairs stays quiet.
Heating, HVAC & electrical
Proper returns, dedicated circuits and panel upgrades where needed.
Bathrooms & kitchenettes
Including up-flush systems where the drain sits above the slab.
Media rooms, gyms & offices
Built-ins, wiring and lighting designed for how the room will actually be used.
Water first, finishes second
Every basement we finish starts with a moisture assessment. Grading, downspouts, weeping tile, cracks and window wells all get checked, because drywall over a wet wall is money set on fire.
Once the envelope is sound, we insulate and frame to current code and build a space that stays warm, dry and comfortable year-round.
Income suites, done legally
Rules for secondary suites differ from city to city across the GTA — ceiling heights, egress, fire separation and parking all matter. We design to the requirements of your municipality and pull the permits, so your suite is rentable and insurable, not a liability.
If income is the goal, we will tell you honestly whether your basement can support it before you spend on drawings.
What it costs
Honest ranges, itemized quotes
Finished basements generally run $45,000 to $130,000 in the GTA. Legal suites, bathrooms, underpinning and waterproofing are the biggest variables, and each one appears as its own line in your quote.
Get my itemized quoteQuestions
Basement Transformation questions, answered
How long does a basement renovation take?
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A straightforward finish is 6 to 10 weeks. A legal suite with permits, egress windows and a full bathroom and kitchen typically runs 10 to 16 weeks.
My basement has had water in the past. Can it still be finished?
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Usually yes, but only after the source is fixed. We identify whether it needs grading, drainage, crack injection or full waterproofing, and quote that separately and honestly.
Do I need a permit to finish a basement?
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Yes in most GTA municipalities, and always for a secondary suite. We prepare the drawings, submit the application and manage the inspections.
Can you add a bathroom if the drain is above the floor?
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Yes — either by breaking the slab to tie into the existing drain, or with an up-flush system when that is the smarter call.
Where we work
Basement Transformation across Toronto & the GTA
Also from CONHECT
Other services
Kitchen Renovation
Custom cabinetry, stone counters and layouts that work.
Learn more →02Bathroom Renovation
Spa-grade washrooms with details that last.
Learn more →04Home Additions
More room to live, matched to your existing home.
Learn more →05Whole-Home Renovation
End-to-end remodels that rethink every room.
Learn more →06Custom Homes
Design-build from the ground up, your way.
Learn more →07Condo Renovation
Renovations planned around your building's rules, not against them.
Learn more →08Basement Apartments & Secondary Suites
A legal second suite, built to code and built to rent.
Learn more →09Garden Suites & Laneway Homes
A full second home in your backyard, built to bylaw.
Learn more →10General Contracting & Project Management
One contract, one schedule, one team accountable for all of it.
Learn more →Get a free quote
Start your basement transformation
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