Basement Second Unit Planner
Toronto
Plan your legal basement apartment in Toronto with real costs, stackable incentives, and rental ROI.
Standard Package
$80,000–$175,000
Max Cash Incentives
Up to $60,900
Rental Income
$2,000–$2,500/mo
Value Lift
15–25%
Choose Your Package
Budget
Basic legal compliance. No lowering, basic finishes, existing ceiling height.
$50,000–$80,000
Standard
Complete legal apartment. Full conversion with quality finishes.
$80,000–$175,000
Premium
High-end luxury suite. Premium finishes, smart home, maximum value.
$150,000–$250,000
Add-Ons & Upgrades
Backwater Valve
Prevents sewage backup into your basement. Required by most municipalities.
$2,000–$4,000
Rebate eligibleSump Pump + Battery Backup
Primary sump pump with battery backup for power outages.
$1,000–$2,000
Rebate eligibleEnergy-Efficient Egress Windows (x4)
Triple-pane, argon-filled egress windows with insulated wells.
$3,000–$6,000
Rebate eligibleBasement Wall Insulation (Spray Foam)
Closed-cell spray foam insulation for maximum energy efficiency.
$2,000–$3,500
Rebate eligibleUnderpinning (if ceiling < 6'5")
Lower basement floor to achieve legal ceiling height. Major structural work.
$75,000–$150,000
Exterior Waterproofing
Full exterior excavation, membrane, weeping tile, and drainage.
$18,000–$40,000
Rebate eligibleHRV Ventilation System
Heat recovery ventilator for fresh air without energy loss.
$3,000–$6,000
Rebate eligibleCost Breakdown
Low-Interest Financing Available
Up to $125,000 in Toronto HELP low-interest financing (as low as 3%)
Return on Investment
Monthly Rental Income
$2,000–$2,500
per month
Payback Period
1.1–5.3 years
to recover investment
Annual ROI
18.8–92.3%
return on investment
Property Value Lift
15–25%
estimated increase
Why this is a smart investment: With monthly rental income of $2,000–$2,500 and a net cost after incentives of $32,500–$127,500, you can recover your investment in approximately 1.1–5.3 years. Plus, your property value increases by 15–25%, building long-term equity.
Available Incentives in Toronto
Stack up to $60,900 in cash incentives + $125,000 in low-interest financing
Federal Programs
Multigenerational Home Renovation Tax Credit (MHRTC)
Up to $7,50015% refundable tax credit on up to $50,000 of renovation costs for creating a secondary suite for a senior or disabled family member.
Eligibility
- Canadian taxpayer
- Creating a self-contained secondary unit
- For a senior (65+) or disabled family member
- Unit must have separate entrance, kitchen, bathroom
Canada Greener Homes Grant
Up to $5,000Up to $5,000 for energy-efficient home improvements including insulation, windows, and ventilation.
Eligibility
- Canadian homeowner
- Home built before 2022
- EnerGuide assessment completed
- Qualifying energy upgrades
Provincial Programs
Ontario Secondary Suite Program
Up to $40,000Up to $40,000 forgivable loan for creating a legal secondary suite. Forgiven after 10 years of maintaining the unit as affordable rental.
Eligibility
- Ontario homeowner
- Creating a new secondary suite or legalizing existing
- Unit must be rented at or below average market rent
- Must maintain as rental for 10 years
Municipal Programs — Toronto
Toronto Basement Flooding Protection Subsidy
Up to $3,400Up to $3,400 for basement flood protection including backwater valves, sump pumps, and waterproofing.
Eligibility
- Property within City of Toronto
- Residential property owner
- Licensed contractor performs work
- Apply before work begins
Toronto HELP (Home Energy Loan Program)
$125,000 @ low interestUp to $125,000 in low-interest financing (as low as 3%) for home improvements including secondary suites. Repaid through property tax.
Eligibility
- Property within City of Toronto
- Residential property owner
- Good standing on property taxes
- Qualifying home improvements
Utility Rebates
Enbridge Home Efficiency Rebate
Up to $5,000Up to $5,000 for insulation, windows, and HRV systems through Enbridge Gas.
Eligibility
- Enbridge Gas customer
- Home energy audit completed
- Qualifying upgrades (insulation, windows, HRV)
Toronto Design Requirements
City-specific building code and zoning requirements
| Requirement | Toronto Standard |
|---|---|
| Ceiling Height | Min 6'5" (1.95m) finished ceiling |
| Egress Windows | Min 3.8 sq ft opening, each bedroom + living area |
| Fire Separation | 1-hour fire separation floor/ceiling, interconnected smoke/CO alarms, fire-rated doors |
| Parking | 1 additional space required (may apply for variance) |
| Electrical | 100A sub-panel minimum, separate meter recommended, GFCI in wet areas |
| Plumbing | Separate shutoff, backwater valve mandatory, sump pump if below sewer |
| HVAC | Separate heating zone, HRV recommended, min ventilation per OBC |
| Permit Timeline | 4–8 weeks |
| Permit Cost | $2,500–$5,000 |
| Zoning | As-of-right in most residential zones since 2024. No owner-occupancy requirement. |
Ontario Building Code (OBC) Universal Standards
Ceiling Height
Minimum 6'5" (1.95m) clear finished ceiling height in habitable rooms
Egress Windows
Minimum 3.8 sq ft (0.35 m²) unobstructed opening in each bedroom and living area
Fire Separation
1-hour fire-resistance rating between units (floor/ceiling assembly)
Smoke Alarms
Interconnected smoke alarms on each level, CO alarms near sleeping areas
Separate Entrance
Separate entrance required (can be interior or exterior)
Kitchen
Sink, cooking appliance, refrigerator, and food preparation space required
Bathroom
Toilet, sink, and shower/tub required. GFCI protection within 1.5m of water
Ventilation
Mechanical ventilation per OBC 9.32 — HRV recommended for efficiency
Electrical
Minimum 100A sub-panel, separate circuits for kitchen, bath, and laundry
Plumbing
Separate shutoff valve, backwater valve where required by municipality
Sound
STC 50 minimum between units (STC 55+ recommended for comfort)
Accessibility
Barrier-free path of travel to unit entrance recommended (not always mandatory)
Compare Nearby Cities
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York Region
Frequently Asked Questions — Toronto
How much does a legal basement apartment cost in Toronto?
A legal basement apartment in Toronto costs $50,000–$250,000 depending on scope. Budget conversions with existing ceiling height start at $50,000. Standard full conversions average $80,000–$175,000. Premium suites with underpinning and high-end finishes reach $250,000+.
What incentives are available for basement apartments in Toronto?
Toronto homeowners can access up to $60,000+ in stacked incentives: Ontario Secondary Suite Program ($40,000 forgivable loan), MHRTC federal tax credit ($7,500), Toronto Basement Flooding Subsidy ($3,400), Enbridge rebates ($5,000), and Toronto HELP financing ($125,000 at low interest).
Do I need a permit for a basement apartment in Toronto?
Yes. Building permits are required for all basement second units in Toronto. You need permits for structural work, plumbing, electrical, and HVAC. The City of Toronto now allows secondary suites as-of-right in most residential zones since 2024.
How long does it take to build a legal basement apartment in Toronto?
A typical basement apartment conversion takes 3–6 months: permit approval (4–8 weeks), structural work/underpinning (4–6 weeks), rough-ins (2–3 weeks), finishing (4–6 weeks), and final inspections (1–2 weeks).
What is the ROI on a basement apartment in Toronto?
At $2,000–$2,500/month rental income and a net cost of $27,000–$130,000 after incentives, payback is typically 1–5 years. Property value increases 15–25%. This is one of the best ROI home investments in the GTA.
Does DrySpace handle permits and inspections for basement apartments?
Yes. DrySpace manages the entire process from architectural drawings and permit applications to construction, inspections, and final occupancy. We also help you apply for all available government incentives.
Ready to Build in Toronto?
DrySpace handles everything — permits, construction, inspections, and all incentive applications. Book your free basement assessment today.