Construction Mortgage Canada 2025

What Is a Construction Mortgage in Canada?

A construction mortgage (also called a construction loan or self-build mortgage) is a specialized financing product designed for homeowners who are building a new home rather than purchasing an existing one. Unlike a regular mortgage where the full amount is advanced at closing, construction mortgage funds are released in stages — called "draws" — as construction progresses.

This staged funding approach protects the lender, since the collateral (your home) doesn't fully exist until construction is complete. It also benefits borrowers by reducing the amount of interest paid during construction — you only pay interest on the funds that have been advanced.

How Draw Schedules Work

A draw schedule outlines when and how much money will be released at each construction stage. Lenders typically use 4-5 draw stages, tied to specific construction milestones verified by an inspector or appraiser.

Construction Mortgage vs. Regular Mortgage

Feature	Construction Mortgage	Regular Mortgage
Fund Release	Staged draws (5-8 stages)	Full amount at closing
During Build Interest	Interest-only on drawn amount	N/A — not applicable
Rate	Variable during construction; converts to fixed or variable	Fixed or variable from day one
Down Payment	20-25% minimum (most lenders)	5% minimum (insured)
Inspections Required	Yes — at each draw stage	No during term
Complexity	High — requires draw management	Low — standard process

Qualifying for a Construction Mortgage

Construction mortgages typically have stricter qualifying requirements than standard mortgages:

• Down payment: Most lenders require 20-25% down. Some lenders offer CMHC-insured construction mortgages with less, but this is less common.
• Detailed plans and permits: You need approved building permits, architectural drawings, and a detailed budget before advancing funds.
• General contractor or builder: Most lenders require a licensed general contractor. Owner-builder projects are possible but require significant documentation of your experience.
• Builder's risk insurance: Mandatory during construction; converts to homeowner's insurance at completion.
• Fixed-price contract preferred: Lenders prefer fixed-price construction contracts rather than cost-plus arrangements.

Costs of Construction Mortgage Financing

• Draw inspection fees: $100-$300 per inspection (4-5 inspections = $400-$1,500)
• Legal fees: $1,500-$3,500 (more complex than standard mortgage)
• Interest during construction: Only on drawn funds, but builds up over the construction period (typically 8-18 months)
• Rate premium: Construction rates are typically 0.25-0.50% higher than standard mortgage rates

CMHC Insurance for New Builds

CMHC offers mortgage loan insurance for construction projects under its CMHC Insured Construction program. This allows qualified borrowers to build with as little as 5-10% down rather than the typical 20-25% required by conventional lenders. The trade-off is the insurance premium added to the mortgage. This program is especially valuable for first-time buyers who want to build rather than buy existing.

Tips for Managing a Construction Mortgage

• Build in a 10-15% contingency buffer for cost overruns — they are almost universal in construction projects
• Keep detailed records of all payments and progress for draw inspections
• Understand your holdback obligations under provincial mechanics' lien legislation
• Communicate proactively with your lender if the project timeline is extending
• Have a backup plan if draw funds are temporarily delayed — contractors expect payment on schedule