Construction Mortgage in Canada (2026): How It Works

Financing a build is nothing like buying a finished home. The money comes in stages as the work progresses, the rules are stricter, and the project has to reach the finish line before it becomes a normal mortgage. Here's how construction mortgages work in Canada in 2026.

The short answer

A construction mortgage funds a build in stages called "draws," released as each phase is completed and verified by inspection. You typically pay interest only on the money advanced so far, and once the home is finished the loan converts to (or is replaced by) a standard mortgage. Lenders advance against the project's progress and final appraised value, so budgeting and documentation are critical. See construction mortgage options.

How draws work

Instead of one lump sum, the lender releases funds at milestones — commonly tied to stages like foundation, framing/lock-up, drywall, and completion. Before each draw, an inspector or appraiser confirms the work is done and the value supports the advance. You (or your builder) fund each stage and get reimbursed as it's verified, so cash-flow planning matters. Some lenders hold back a portion until lien periods pass.

Draw mortgage vs. completion mortgage

• Progress-draw mortgage: the lender advances funds during construction (the model above) — used when you're managing the build or working with a custom builder.
• Completion mortgage: common with builder-built new homes, where you don't pay until the home is finished and you take possession — effectively a normal purchase with a long rate hold. See pre-construction financing for buying from a builder.

Interest during construction

During the build you usually pay interest only on the amount advanced to date, which keeps carrying costs manageable while no full mortgage payment is due yet. Once construction is complete and the final draw funds, the loan converts to a regular amortizing mortgage — and that's when you lock your long-term rate and term. Model the eventual payment with the payment calculator.

What lenders need

• Detailed plans and a fixed-price build contract (or a thorough cost breakdown).
• A realistic budget and timeline, with contingency for overruns.
• A qualified builder (and often new-home warranty enrolment, e.g. Tarion in Ontario).
• The land — owned or being purchased — plus your income, credit, and down payment.
• An appraisal of the projected finished value.

Down payment and risk

Construction financing typically requires more equity than a standard purchase, reflecting the added risk of an unfinished project. Cost overruns and delays are the main dangers, so build a contingency into your budget. For complex or non-standard projects, a private construction loan can bridge the build before you refinance to a conventional mortgage at completion. For larger developments, this often overlaps with commercial financing.

Frequently asked questions

How does a construction mortgage work in Canada?

Funds are released in stages (draws) as construction milestones are completed and verified by inspection. You pay interest only on advanced funds, and the loan converts to a regular mortgage once the home is finished.

Do I make payments during construction?

Typically you pay interest only on the amount advanced so far, not a full mortgage payment, until the build is complete and the loan converts.

How much down payment do I need to build?

Usually more than a standard purchase, because of the added project risk. The exact amount depends on the lender, the build, and the projected finished value.

What's the difference between a draw and a completion mortgage?

A progress-draw mortgage advances money during construction; a completion mortgage (common with builder-built homes) pays out only when the finished home is ready for possession.

Planning a build? Talk to us — we'll structure the draws, manage the conversion to a permanent mortgage, and keep your project funded stage by stage. See construction options.