Quick Summary: Basement Renovation Cost in Toronto 2026
- Basic finish: $35-$55 per square foot
- Mid-range with bathroom: $55-$75 per square foot
- Legal apartment: $90-$140+ per square foot
- Average 1,000 sq ft project: $45,000-$100,000
- Adding a bathroom: $15,000-$35,000 extra
- Permits: $500-$3,000 depending on scope
If you are planning a basement renovation in Toronto, the first question is always the same: how much is this going to cost? The honest answer depends on what you want to do with the space.
A simple rec room with drywall and basic flooring is a very different project than a legal basement apartment with its own kitchen, bathroom, and separate entrance. Both are basement renovations, but the price gap is significant.
This guide breaks down real 2026 pricing for Toronto and the GTA. No fluff, no made-up numbers. Just what contractors are actually charging right now.
Basement Renovation Cost Per Square Foot in Toronto
Most Toronto contractors quote basement renovations by the square foot. Here is what you can expect in 2026:
| Renovation Level | Cost Per Sq Ft | What You Get |
|---|---|---|
| Basic Finish | $35-$55 | Framing, drywall, basic flooring, lighting, paint. No bathroom. |
| Mid-Range | $55-$75 | Better materials, one bathroom, finished ceiling, improved lighting. |
| Full Finish | $65-$100 | Quality finishes, bathroom, open layout, upgraded flooring. |
| Legal Apartment | $90-$140+ | Kitchen, bathroom, fire separation, separate entrance, permits. |
The range is wide because every basement is different. A 1970s bungalow with 6-foot ceilings and moisture issues costs more to renovate than a newer home with 8-foot ceilings and dry walls.
Total Project Costs by Size
Here is what typical Toronto basement renovations cost in total:
| Basement Size | Basic Finish | Mid-Range | Legal Apartment |
|---|---|---|---|
| 500 sq ft | $17,500-$27,500 | $27,500-$37,500 | $45,000-$70,000 |
| 800 sq ft | $28,000-$44,000 | $44,000-$60,000 | $72,000-$112,000 |
| 1,000 sq ft | $35,000-$55,000 | $55,000-$75,000 | $90,000-$140,000 |
| 1,500 sq ft | $52,500-$82,500 | $82,500-$112,500 | $135,000-$210,000 |
These are all-in numbers including labour, materials, and basic permits. They do not include furniture, appliances, or major structural work like underpinning.
What Drives Up Basement Renovation Costs
Several factors can push your project above the average:
Adding a Bathroom
This is the biggest cost driver. Breaking concrete to run plumbing is expensive. Budget $15,000-$35,000 for a basement bathroom depending on layout and fixtures.
Low Ceiling Height
If your ceiling is under 6 feet 5 inches, you may need underpinning or bench footing to meet code. This adds $50,000-$80,000 or more to the project. Our guide on underpinning vs bench footing explains the differences between these two methods.
Moisture Problems
Water issues need to be fixed before finishing. Interior waterproofing runs $3,000-$10,000. Exterior waterproofing costs $10,000-$35,000. The City of Toronto offers a Basement Flooding Protection Subsidy of up to $3,400 for qualifying work.
Building a Legal Apartment
Legal secondary suites require fire-rated drywall, interconnected smoke alarms, egress windows, a separate entrance, and full permits. This adds 30-50% to your costs but also creates rental income potential of $2,300-$2,600 per month in Toronto. See our guide to legal basement apartment requirements in Ontario for the full list of code requirements.
Component Cost Breakdown
Here is where your money actually goes:
| Component | Cost Range |
|---|---|
| Framing | $25-$45 per linear foot |
| Drywall (installed) | $1.80-$4.50 per sq ft |
| Flooring | $4-$24 per sq ft installed |
| Painting | $3-$7 per sq ft |
| Electrical | $2,000-$5,000 |
| Plumbing (bathroom) | $3,000-$8,000 |
| Bathroom fixtures | $3,000-$15,000 |
| Egress window | $3,000-$5,000 each |
| Permits | $500-$3,000 |
Permit Costs in Toronto
Building permits are required for most basement renovations in Toronto. According to the City of Toronto, interior alteration permits cost $11.09 per square metre as of January 2026. The minimum fee is $206.53.
For a 1,000 sq ft (93 sq m) basement, expect permit fees around $1,000-$1,500 plus the cost of drawings from an architect or designer, which typically runs $2,000-$5,000.
How Long Does a Basement Renovation Take
Timelines vary based on scope:
- Basic finish: 4-6 weeks
- Mid-range with bathroom: 6-10 weeks
- Legal apartment: 10-16 weeks
Permit approval adds 2-4 weeks before work can start. Custom materials and fixture orders can add more time. Plan for the unexpected.
Is a Basement Renovation Worth It
From a return on investment perspective, basement renovations deliver 70-75% ROI at resale. That means a $75,000 renovation could add $52,000-$56,000 to your home value.
But the real value often comes from rental income. A legal basement apartment in Toronto rents for $2,300-$2,600 per month. That is $27,600-$31,200 per year in gross income. Many homeowners pay off their renovation within 3-5 years from rent alone.
For more details on what it takes to build a legal suite, check our guide to basement permits in Vaughan which covers the process for York Region municipalities.
Tips to Save Money on Your Basement Renovation
- Keep the existing layout: Moving plumbing and electrical adds thousands to your budget.
- Choose LVP flooring: Luxury vinyl plank costs $4-$12 per sq ft installed, looks like wood, and handles moisture better.
- Skip the drop ceiling: Painted exposed joists or drywall ceilings cost less than suspended tile systems.
- Get multiple quotes: Three to five quotes help you understand the real market rate.
- Renovate in winter: Contractors often have more availability and may offer better rates.
Frequently Asked Questions
A 1,000 sq ft basement in Toronto costs $35,000-$55,000 for a basic finish, $55,000-$75,000 for a mid-range finish with a bathroom, and $90,000-$140,000 for a legal apartment with kitchen and separate entrance.
Yes, for most work. Permits are required for framing, electrical, plumbing, and HVAC changes. Cosmetic updates like paint and flooring do not need permits. The City of Toronto charges $11.09 per square metre for interior alteration permits.
Most basement renovations take 4-10 weeks depending on scope. A basic finish takes 4-6 weeks. Adding a bathroom extends the timeline to 6-10 weeks. Legal apartments can take 10-16 weeks including permit approval time.
The most affordable approach is a basic finish with drywall, LVP flooring, paint, and recessed lighting. Skip the bathroom and use a simple open layout. This runs $35-$55 per square foot in Toronto. Renovating in winter when contractors are less busy can also save money.
Yes. Basement renovations deliver 70-75% ROI at resale. If you build a legal apartment, you can earn $2,300-$2,600 per month in rental income, which often pays off the renovation in 3-5 years.
Understanding basement renovation cost in Toronto helps you budget properly and avoid surprises. Whether you are finishing a simple rec room or building a legal rental unit, getting accurate quotes from experienced contractors is the best way to know what your specific project will cost. Start with a clear scope, get multiple quotes, and plan for a 10-15% contingency for the unexpected. If you need help planning your basement renovation, reach out for a free estimate.
