Finished basement family room with oak flooring and pot lights after a Toronto basement renovation

See a Fair Price for Your Toronto Basement Before Anyone Visits

Finishing an 800 sq ft unfinished basement in Toronto with one bedroom costs about $47,500 to $72,500 CAD before HST at 2026 prices. The low end has no bathroom, and the high end adds a full bathroom.

An unfinished basement can become a family room, office, or guest space. Before you pick finishes, check the ceiling height, any water problems, and what work is already done.

Prices updated October 2026

Price Your Basement

Your Basement

sq ft
Enter the total floor area of the basement in square feet.

Current StateSelect how much of the basement is finished today.
Ceiling HeightSelect the height from the floor to the bottom of the ceiling joists.
Enter how many bedrooms, offices, or storage rooms you want, each with its own walls and door.

Plumbing, Heating, and Water

Bathroom or LaundrySelect the bathroom or laundry area you want to add.
Heating and ElectricalSelect the heating and electrical work the basement needs.
Leaks, Damp Spots, or CracksSelect the water or foundation problems you see in the basement today.

Upgrades

Tick to insulate the outside walls with spray foam.
Tick to add sound insulation and resilient channel to the ceiling.
Tick to add fire-rated drywall and smoke alarms that sound together.
Tick to replace the electrical panel with a larger one.

Location

Enter the first 3 characters of your postal code to apply location-based pricing.

Fill in the fields above to see your price
Pick a time for True Frame Builders to visit, measure, and prepare your quote.Book a home visit

What Changes the Cost

  • Water and foundation: Leaks, damp spots, and cracks get fixed before new walls go up, and the repair adds to the cost.
  • Rooms and doors: Each room adds framing, drywall, a door, and trim.
  • Insulation and ceilings: Spray foam and a soundproof ceiling cost more than standard insulation and drywall.
  • Bathrooms and plumbing: A new bathroom needs drain lines under the floor, the largest single add-on.
  • Heating, electrical, and fire safety: New heat runs, a larger electrical panel, and fire-rated materials each raise the total.
Contractor sealing a foundation wall crack before framing in a Toronto basement renovation
Cracks and leaks get sealed before new walls go up, so the finished basement stays dry.
Wall framing over spray foam insulation on the foundation walls of a Toronto basement renovation
Spray foam on the outside walls costs more than standard insulation and keeps the room warmer.
New bathroom drain lines in a trenched concrete floor during a Toronto basement renovation
A basement bathroom needs drain lines cut into the concrete floor, the largest single add-on.

What Your Estimate Includes

Your estimate covers the basement spaces you choose, with framing, insulation, drywall, flooring, paint, lighting, and outlets. A separate rental unit needs fire separation, safe exits, and other code work, which the legal basement apartment estimate prices.

What True Frame Builders Checks Before Your Quote

Contractor measuring ceiling height under the floor joists before a Toronto basement finishing quote
True Frame Builders measures your ceiling height and checks for water before sending your quote.

Bedroom size, ceiling height, and rental-unit rules depend on your design and your property. True Frame Builders confirms them when it reviews your saved project. Your final price depends on site conditions, measurements, chosen materials, and the full work plan. True Frame Builders visits, measures, and then sends your quote.

Common Questions

How much does it cost to finish a basement in Toronto?

Finishing an 800 sq ft unfinished basement with one bedroom costs about $47,500 to $72,500 CAD before HST at 2026 prices. The low end has no bathroom, and the high end adds a full bathroom. Your own cost depends on your answers in the estimate and the condition of your basement.

How do I finish a basement that gets damp?

Find and fix the source of the water before new walls or flooring go in. The repair adds to your cost, and your estimate includes it when you select damp spots or leaks.

Can I rent out my finished basement?

A rental unit has extra requirements, such as fire separation and a safe exit. The legal basement apartment estimate prices that work.

Plan the Next Part of Your Project

Many basement projects also include a legal basement apartment, a bathroom renovation upstairs, or a whole-home renovation. Each one has its own estimate, and your saved estimates add up to one project total.

For City of Toronto permit rules, see the Toronto guide to interior alterations.