Construction mortgage in Alberta after the October 2026 rate hike

A construction mortgage in Alberta pays your builder in stages, called progress draws, as each part of the house passes inspection. You pay variable interest only on what's been drawn. On 28 October 2026 the Bank of Canada raised its key rate a quarter point, to 2.5% (Bank of Canada). Every dollar drawn now costs more to carry.

The hike was the central bank's first increase in over three years (Ratehub, 2026). This guide is general information, not financial advice. Rates, draw schedules and terms vary by lender, so confirm yours with the lender before you sign a build contract.

How does a construction mortgage work in Alberta?

The lender approves the full amount up front, then pays it out in pieces as the build reaches set milestones. Before each draw, an inspector confirms the stage is finished.

Royal Bank of Canada (RBC) publishes a five-draw example. The first draw is based on the lot, at up to 65% of its appraised value. The later draws follow the main stages of the build (RBC, 2026):

The bank holds back part of each draw for a period set by provincial rules. In Alberta, the owner keeps back 10% under the Prompt Payment and Construction Lien Act. That money generally stays held for at least 60 days after the work is substantially done (McCarthy Tétrault, 2024).

You also pay for the inspections. Some banks take the appraisal and inspection fees out of each draw (Ratehub, 2022).

What does the 28 October 2026 rate hike do to a construction mortgage?

The hike raises the interest on every dollar you've already drawn, starting now. The policy rate went from 2.25% to 2.5%. Ratehub reported that the prime rate would rise by the same 25 basis points (Ratehub, 2026).

Construction loans are floating-rate (Canadian Press, 2026). Here's what the hike alone adds. Your lender's margin over prime comes on top.

The extra interest grows as the draws do. Your balance is smallest after the lot draw. It's largest in the last months, when it's paying for framing, rough-ins and finishes.

Fixed rates are a separate question. As of 28 October 2026, the lowest five-year fixed rate was 4.34%. The lowest variable rate rose from 3.45% to 3.70%.

Fixed rates were largely unaffected, because they had already risen with the bond market. The build itself may cost more, too: the central bank expects higher energy and import costs to raise what it costs to build homes (Canadian Press, 2026).

Ask your lender when you can lock the rate on the permanent mortgage. The next rate decision is on 9 December 2026.

Progress-draw vs completion mortgage: which fits a custom build?

For a custom home on your own lot, it's usually a progress-draw mortgage. A completion mortgage pays nothing during the build. It pays the full amount on the day you take possession (Sterling Homes, 2024). That suits a finished home you buy from a builder.

If you own the lot and hire the builder, your lender pays for the house one stage at a time. That's the job a draw mortgage does. Ask your builder which kind their contracts expect before you choose a lender.

What do Alberta lenders require?

Expect a down payment, a signed contract with a licensed builder, warranty enrolment and an inspection before each draw. The details vary by lender. The Canada Mortgage and Housing Corporation (CMHC) insures many of these loans and sets rules for them.

Alberta's warranty runs one year on labour and materials and two years on delivery and distribution systems. It runs five years on the building envelope and ten on the main structure.

Timing has a limit too. In RBC's example, the foundation must be finished within 180 days of the first draw. A slow permit can eat into that, so ask each lender for its written draw schedule, fees and deadlines.

For the budget, the custom home cost guide shows what a Calgary build costs before land, tax and contingency.

How do mid-build changes add draws and interest?

A change after work starts adds a change order, and it can push back the next draw. Each draw waits for an inspected stage. While it waits, you keep paying interest on what's already drawn.

First, the builder prices the change. A Calgary contractor's 2026 guide puts moving a framed wall at $1,500 to $3,000, markup included (contractor guide). The guide to moving a wall after framing covers other changes.

The budget may not stretch. Before you sign a change order, ask your lender whether the extra cost can go on the mortgage or has to come from savings.

The schedule slips. If framing or rough-ins take longer, the next inspection and draw move with them. On a rate that just went up, a longer build at a higher balance costs more.

Some changes aren't your choice, like a fix an inspector asks for. The ones you do choose cost least before the first draw.

What should you settle on the plan before the first draw?

Settle anything that changes structure, plumbing, stairs or the size of the house. Those set the contract price, the lender's budget and the permit drawings. Changing them later reopens all three.

Walk through your daily routines on the plan, like carrying groceries in, a busy morning in the kitchen, or getting a couch up the stairs. Each one tests a room's size and the path between rooms.

Where a full-size walkthrough fits

Before permits and before the first draw, while the plan is still on paper.

At 1to1 Plans Calgary, your floor plan lights up at full size on a floor you can walk on, with room names and dimension lines. You walk it room by room and move the studio's furniture around. Your designer updates the drawings afterwards (how it works). You keep a recording of the session.

Sessions are quoted per plan, the quote is free, and there's nothing to pay at booking. See the homeowners page or book a session.