ADU Financing in Calgary

Calgary ADU financing guide: layer the $10 k city grant, fee-amnesty waivers and the new $80 k federal loan with HELOC or refinance options—compare every path in one place.

ADU Financing in Calgary: How to Fund Your Basement or Backyard Suite

Calgary homeowners can finance a backyard suite or legal basement apartment by combining city incentives—including a low-interest  $80,000 federal suite loan and a $10,000 city grant—with flexible home-equity products, shrinking out-of-pocket cost.

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Calgary Local Housing Context

Calgary has embraced additional dwelling units at speed. The city streamlined secondary-suite approvals in 2018 and now allows a basement and a backyard suite on the same lot. Uptake shows: by 2024, more than 16,000 suites were legally registered city-wide, double the 2021 figure. A Secondary-Suite Amnesty waives all permit & registration fees until 31 Dec 2026. Residential building-permit value jumped 27 % in 2024, much of its ADU demand. With high housing costs, suites are Calgary’s fastest route to mortgage-offsetting rental income.

Grants & Incentives

Canada Secondary-Suite Loan

Federal pilot offers up to $80 000 at ≈ 2 % over 15 years; popular with Calgary owners converting equity-rich bungalows into income suites. 

Calgary Secondary-Suite Grant

$10 000 City pays $10 000 cash (plus energy + accessibility top-ups) to help basement suites meet Alberta Building Code—perfect for older 1960s homes in established neighbourhoods.

Secondary-Suite Amnesty

100 % waiver of development permit and suite-registration fees through 31 Dec 2026—saving hundreds in city charges. 

Multigenerational Home Renovation Tax Credit

Claim up to $7 500 when your suite houses a senior parent or disabled family member—aligns with Alberta’s Aging-in-Place strategy. 

Canada Greener Homes Grant

Up to $5 000 for heat pumps, insulation, or triple-pane windows; Calgary’s cold-climate EnerGuide upgrades often qualify at the top tier.

GST New-Housing Rebate

Recover a portion of GST on newly built or substantially renovated suites—typical Calgary refund ranges $3 k–$8k, depending on build cost.

Loans & HELOC Options

For many Calgary homeowners, accessing existing home equity is the most practical way to finance an ADU, especially for larger renovations or backyard-suite builds. Here are the most common options:

Home-Equity Loan (Second Mortgage)

A fixed lump-sum loan secured against your home’s value. This route works well for homeowners who want to preserve their current mortgage but still unlock capital. Pros: Predictable payments; access to a large amount upfront. Cons: Typically comes with a higher rate than your first mortgage; adds a second monthly loan. 

Home-Equity Line of Credit (HELOC)

A revolving credit facility tied to your property, often used in Calgary to manage staged costs or unexpected upgrades during construction. Pros: Only pay interest on what you use; flexible access over time. Cons: Subject to variable rates; must have strong equity and credit history.

Construction Loan (Progress-Draw Mortgage)

Designed for larger builds like detached backyard suites. Funds are distributed in phases as construction progresses, with lender inspections required along the way. Pros: Great for managing large contractor payments and scheduling. Cons: Requires approved plans, permits, and bank approval before work begins.

Cash-Out Mortgage Refinance

Roll your current mortgage into a larger one and extract equity to finance your ADU. Calgary homeowners often consider this when their fixed term is up. Pros: Usually offers better rates than unsecured loans; simplifies into one payment. Cons: Triggers early repayment penalties if refinanced mid-term; resets your amortization.

 

Unsecured Renovation Loan / LOC

This option doesn’t use your home as collateral and is usually best for soft costs or smaller projects. Pros: Fast approval; no lien on your property. Cons: Higher rates and lower borrowing limits than equity-backed options.

Quick Comparison Snapshot

HELOC vs. Refinance

A HELOC is best when you want to keep a low-rate first mortgage and draw funds in stages; a cash-out refinance bundles everything into one loan and works well if your term is about to renew at a higher rate. Both tap up to 80 % equity.

Government Money First

Combine Calgary’s $10 k grant with the fee-amnesty waiver, then add the $80 k federal loan. Many owners cover 60–70 % of soft costs with these programs before touching private debt.

Bridging Gaps with Equity

A second mortgage or an unsecured LOC can fill remaining gaps when equity is tight or timelines demand speed. They’re often used for design fees, energy-upgrade overruns, or contingency funds.

Construction-Specific Financing

For detached garage suites, a progress-draw loan releases cash at each inspection milestone, protecting both homeowner and builder while keeping interest costs on only the money drawn to date.

Frequently Asked Questions

What zoning and permit rules do I need before any financing kicks in?

Calgary requires a building permit for every secondary or backyard suite; detached units also need a development permit. Most lenders and the $10k city grant release funds only after permits are issued. Our step-by-step Process Map can help you navigate through the steps.

How much rental income can I expect from an ADU in Calgary?

Rents vary by neighbourhood, unit size, and finish level. Check the latest CMHC Rental Market Report for city-wide averages, then plug numbers into the Resimates Rental-Income Calculator to model cash flow before you build.

Where can I decode the jargon—Home Improvement Loan, LTV, Line of Credit (LOC)?

Head to our Key Financial Terms. It covers everything from Alberta’s gentle-density zoning classes to financing acronyms, so you can read permits or loan docs with confidence.

Final Considerations

Financing an ADU in Calgary doesn’t have to feel like a maze. By stacking city incentives, federal low-interest loans, and the right home-equity product, most owners turn six-figure build costs into a manageable monthly payment—usually offset by rental cash flow within the first year. Ready to see what mix works for you? Compare All Options side-by-side and start planning today.