What government programs help pay for building a secondary suite in Canada?

The main federal program is the Canada Secondary Suite Loan Program (CSSLP), which provides CMHC-insured loans up to $80,000 for building a legal secondary suite. Additionally, several provinces and municipalities offer grants, forgivable loans, and tax rebates. British Columbia offers up to $40,000 through its secondary suite program. Many municipalities have also relaxed zoning to allow suites where they were previously prohibited.

How much does it cost to build a secondary suite in Canada?

Costs vary widely depending on the type of suite and your location. A basement suite conversion typically costs $50,000–$100,000. A laneway house or garden suite costs $150,000–$350,000+. A garage conversion runs $60,000–$120,000. These costs include permits, design, construction, plumbing, electrical, and finishing. Government incentives can offset $40,000–$80,000 of these costs.

Can you use rental income from a secondary suite to qualify for a mortgage?

Yes, in many cases. Lenders can use a portion of the projected or actual rental income from a secondary suite to help with mortgage qualification. For the CSSLP specifically, projected rental income can help you qualify for the loan. For your primary mortgage, some lenders use 50%–80% of the rental income to offset your debt service ratios.

Do you need a permit to build a secondary suite?

Yes. A legal secondary suite requires building permits and must meet municipal zoning bylaws, the Ontario Building Code (or equivalent provincial building code), and fire safety requirements. Building without permits creates an illegal suite — which cannot be legally rented and may cause insurance and mortgage issues. Government incentive programs require that suites be legal and permitted.

Secondary Suite Incentives in Canada: Every Government Program (2026)

Building a secondary suite — a basement apartment, laneway house, garden suite, or in-law addition — is one of the most practical ways to increase Canada’s housing supply while generating rental income to help offset mortgage costs. Recognizing this, all three levels of government have introduced incentive programs to make suite construction more affordable and accessible.

This guide covers every major federal, provincial, and municipal incentive program available in 2026.

Federal Programs

Canada Secondary Suite Loan Program (CSSLP)

The CSSLP is the primary federal program, administered by CMHC.

Feature	Details
Program	Canada Secondary Suite Loan Program (CSSLP)
Maximum loan	$80,000
Loan type	CMHC-insured; separate from your mortgage
Interest rate	Competitive — lower than unsecured renovation loans
Repayment term	Up to 15 years
Eligibility	Owner-occupied primary residence
Suite requirement	Must create a self-contained, legal secondary suite
Rental income offset	Projected rental income can help qualify

For full details on the CSSLP application process and eligibility, see: Canada Secondary Suite Loan Program.

GST/HST New Residential Rental Property Rebate

When you build a new secondary suite for rental purposes, you may be eligible for a GST/HST rebate on the construction costs.

Factor	Details
Rebate	Up to 36% of the GST (or federal portion of HST) paid on construction costs
Maximum rebate	$6,300 (at the GST-only rate)
Eligibility	Must be used as a long-term rental (not personal use or short-term rental)
Application	Filed with CRA after construction is complete

CMHC Eco-Friendly Programs

If your secondary suite includes energy-efficient features, you may qualify for additional CMHC incentives:

Program	Benefit
CMHC Green Home	Premium refund of up to 25% on CMHC insurance when building energy-efficient homes/suites
Canada Greener Homes	Grants for energy retrofits that can be combined with suite construction

Provincial Programs

British Columbia

BC has some of the most generous secondary suite incentives in Canada, driven by the province’s acute housing shortage.

Program	Details
BC Secondary Suite Incentive Program	Forgivable loan up to $40,000 for building a secondary suite
Eligibility	Homeowners in eligible municipalities; suite must be rented at below-market rates for 5 years
Forgiveness	Loan is fully forgiven if rental conditions are met for the full term
Zoning changes	Provincial legislation now requires most municipalities to allow secondary suites and laneway houses
Property tax exemption	Some municipalities exempt secondary suites from property tax increases

Ontario

Program	Details
Ontario Renovates	Forgivable loans for low-income homeowners to create accessible secondary suites
Amount	Up to $25,000 (varies by municipality)
Additional Residential Unit (ARU) rules	Ontario passed legislation permitting up to 3 ARUs on most residential lots
Development charge exemptions	Many Ontario municipalities have exempted secondary suites from development charges
Zoning	As of 2024, Ontario’s Bill 23 (More Homes Built Faster Act) requires municipalities to allow at least 2 additional residential units on most residential properties

Quebec

Program	Details
Accès Logis and similar programs	Provincial funding supports creation of affordable housing units including secondary suites in some contexts
Municipal programs	Montreal and Quebec City have specific secondary suite grant programs
Zoning	Zoning for secondary suites varies significantly by municipality in Quebec

Alberta

Program	Details
Provincial suite programs	Limited provincial-level programs; primary incentives are at the municipal level
Calgary	City of Calgary allows secondary suites city-wide; streamlined permit process
Edmonton	Edmonton permits secondary suites and garden suites on most residential lots; reduced development charges

Other Provinces

Province	Secondary Suite Support
Manitoba	Winnipeg permits secondary suites in most zones; some grant programs through Manitoba Housing
Saskatchewan	Varies by municipality; Saskatoon and Regina allow secondary suites in many zones
Nova Scotia	Halifax Regional Municipality allows backyard suites and secondary suites; streamlined permitting
New Brunswick	Limited programs; Saint John and Moncton have modernized zoning to allow suites
Newfoundland	St. John’s permits secondary suites; limited financial incentive programs
PEI	Charlottetown permits secondary suites; provincial housing programs may assist

Municipal-Level Incentives

Many cities have introduced their own incentives beyond provincial programs:

Municipality	Incentive
Toronto	Waived development charges for secondary suites; streamlined permit process
Vancouver	Development charge waivers for laneway houses; pre-approved designs available
Ottawa	Secondary suite grant program up to $25,000
Hamilton	CMHC-funded secondary suite pilot program
Victoria	Pre-approved garden suite designs; reduced permit fees
Kelowna	Streamlined permits; zoning allows suites on most lots
Halifax	Backyard suite pilot program; reduced permit fees

Suite Types and Typical Costs

Suite Type	Typical Cost Range	Construction Time	Rental Income Potential (Monthly)
Basement apartment	$50,000–$100,000	3–6 months	$1,000–$2,000
Garage conversion	$60,000–$120,000	3–6 months	$1,000–$1,800
Above-garage suite	$100,000–$200,000	4–8 months	$1,200–$2,200
Laneway house	$150,000–$350,000	6–12 months	$1,500–$3,000
Garden suite (detached)	$150,000–$300,000	6–12 months	$1,500–$2,800
In-law addition (attached)	$80,000–$180,000	4–8 months	$1,200–$2,200

Stacking Incentives

Multiple programs can often be combined:

Incentive Layer	Amount	Example (Basement Suite in Ontario)
CSSLP loan	Up to $80,000	$80,000 low-interest loan
Provincial program (Ontario Renovates)	Up to $25,000	$25,000 forgivable loan
Municipal development charge waiver	$5,000–$15,000	$10,000 saved
GST/HST rental rebate	Up to $6,300	$4,500 rebate
CMHC Green Home premium refund	15%–25% of CMHC premium	Varies
Total incentive value	$50,000–$125,000+	$119,500 in combined value

Not all incentives can be stacked in every situation. Confirm eligibility for each program individually.

Financial Analysis: Does a Secondary Suite Pay Off?

Example: Basement Suite in the GTA

Factor	Amount
Construction cost	$85,000
CSSLP loan (15-year, ~5%)	$672/month
Less: rental income	−$1,500/month
Net cash flow	+$828/month
Payback period (ignoring incentives)	~57 months (~5 years)
With $25,000 Ontario Renovates grant	Payback ~40 months (~3.3 years)

Impact on Your Mortgage

Factor	Effect
Property value increase	A legal secondary suite typically adds $50,000–$150,000 in property value
Rental income for qualification	Lenders may use 50%–80% of suite rental income to improve your debt service ratios
Refinancing opportunity	Increased property value creates equity for future refinancing
HELOC access	More equity means better HELOC options

Requirements for a Legal Secondary Suite

Requirement	Details
Building permit	Required in all jurisdictions
Separate entrance	Most codes require an independent exterior entrance
Minimum ceiling height	Typically 6'5" (1.95m) for habitable rooms; 6'1" (1.85m) for hallways
Bathroom and kitchen	Must be self-contained with full plumbing
Fire separation	Minimum 45-minute fire separation between units; fire-rated drywall and doors
Smoke and CO detectors	In all rooms and at all exits
Egress windows	Bedrooms must have windows large enough for emergency exit
Electrical	Separate panel or sub-panel; meets provincial electrical code
Parking	Some municipalities require additional parking for the suite
Zoning compliance	Property must be zoned for secondary suites or covered by a blanket allowance

Building without permits creates an illegal suite, which can result in fines, insurance claim denials, and issues with your mortgage lender.