Investor education on construction lending in Canada is close to non-existent. There is a great deal written for builders about how to obtain a construction loan, and very little written for the people whose capital funds it. That is an odd gap, because construction is where private mortgage lending carries its most distinctive risks — risks that do not exist at all on a completed house.
The central difference is this. On a completed property, your security exists. If the borrower stops paying you can sell the thing. On a construction file, your security is partly a promise: a half-built structure is worth less than the land plus the money spent, because finishing it requires somebody to spend more.
How a construction mortgage is advanced
A construction mortgage is not advanced in one payment. It is drawn in stages against work completed, which is the single most important mechanical fact about it.
- Initial advance. Typically against the land, sometimes with permits and servicing in place.
- Stage draws. Released as work is completed and verified — commonly at foundation, framing and lock-up, then at substantial completion. Each draw is normally supported by an inspection or a quantity surveyor's report rather than the builder's say-so.
- Holdback. A statutory amount retained from each payment under provincial construction lien legislation, released only after the lien period has expired.
- Final advance. On completion, occupancy or whatever the commitment specifies.
For an investor, the draw structure is protective. Money is not at risk until the corresponding value exists. It also means your capital is deployed gradually, which affects your actual return: committed capital earns nothing until it is advanced, so the yield on the commitment and the yield on the money at work are different numbers.
Cost to complete — the number that matters most
The question a construction lender asks at every stage is not what the project is worth. It is whether the money remaining is enough to finish it. That is the cost to complete, and it is the discipline that separates a competent construction lender from an optimistic one.
If a project stalls at framing and the remaining budget will not cover lock-up, the lender has a problem no appraisal solves. The options are to advance more than was committed, find another party to finish the work, or sell a partly built structure into a market that discounts unfinished projects heavily. All three are expensive, and all three take time during which interest and property taxes continue to accrue.
As-is against as-complete, and why it matters here
Construction appraisals are often written on an as-complete basis, giving the value of the finished building. A loan-to-value computed against that figure describes a property that does not yet exist. The same ratio computed against as-is value — land plus work actually in place — is usually far less comfortable, and it is the honest measure of what could be recovered today.
This is not a theoretical concern. It is the specific issue Canadian securities regulators addressed when they reformed the syndicated mortgage regime, adding a requirement that an offering memorandum for a syndicated mortgage include an appraisal from an appraiser independent of the issuer, giving fair market value without considering improvements or development. The reform exists because as-complete valuations were used to make development exposures look safer than they were.
Construction liens, and why your priority is not as clean as you think
Every province has construction lien or builders' lien legislation that allows contractors, subcontractors and suppliers who have improved a property to register a claim against it. In certain circumstances those claims can rank ahead of a mortgage advance, which is precisely why statutory holdbacks exist and why they are not optional.
The practical consequence for an investor is that registered priority on a construction file is more conditional than on a completed property. A lender who advanced without proper holdbacks, or without confirming that trades were paid, can find a clean first charge competing with lien claims. Provincial rules differ in their detail, their holdback percentages and their timelines, so a project's jurisdiction is part of the risk.
What distinguishes a well-run construction file
| Reassuring | Worth questioning | |
|---|---|---|
| Draw verification | Independent inspection or quantity surveyor before each advance | Advances released on the builder's invoice alone |
| Cost to complete | Re-tested at every draw, with contingency identified | Tested once at origination |
| Appraisal basis | As-is value stated alongside as-complete | As-complete only |
| Lien holdback | Retained per statute, released after the lien period | Netted informally, or released early to help cash flow |
| Trade payment | Statutory declarations confirming trades are paid | Not checked |
| Builder record | Completed comparable projects, verifiable | First project of this type or scale |
| Exit | A committed takeout, pre-sales, or a credible sale plan | "Refinance on completion" with no counterparty |
What happens when a builder stops
This is the scenario the whole structure is designed around, so it is worth stating plainly. The lender's realistic choices are to fund completion themselves, bring in a replacement builder, or sell as-is. Each erodes recovery differently: funding completion increases exposure on a project that has already disappointed, replacement builders price the risk of inheriting someone else's work, and an as-is sale meets a buyer pool that is small and knows it.
Throughout all of it, interest accrues, property taxes fall due, insurance must be maintained, and the site must be secured. On a second charge behind a construction first, those costs consume the residual that would have repaid you. Construction exposure in a second position is among the sharper risks in private lending, and it should be priced and described as such.
Questions to ask about any construction mortgage investment
- What is the as-is loan-to-value today, as distinct from as-complete?
- Who verifies each draw, and does the lender see an independent report?
- How often is cost to complete re-tested, and what contingency is built in?
- Are statutory holdbacks retained, and is trade payment confirmed by declaration?
- What position does this investment hold, and what is ahead of it?
- What is the exit, and is the takeout committed or merely hoped for?
- What has this builder completed before, at this scale, in this market?
On a finished house your security exists. On a construction file it is partly a promise, and the only question that matters at every stage is whether the money left is enough to finish the job.
Questions investors ask
How does a construction mortgage investment work?
Funds are advanced in stages against verified progress rather than in one payment, with a statutory holdback retained at each stage under provincial lien legislation. Your capital is deployed gradually, so the yield on your commitment and the yield on money actually advanced differ.
What are the risks of a construction mortgage investment?
Cost-to-complete shortfall, builder failure, construction lien claims that can compete with a mortgage's priority, as-complete valuations that overstate present security, delay while interest and taxes accrue, and a thin buyer pool for a partly built structure.
What is a lien holdback and why does it protect me?
A statutory amount retained from each payment and released only after the lien period expires. It exists because contractors and suppliers who improved a property can register claims that may rank ahead of a mortgage advance. A lender who releases holdbacks early is weakening your priority.
Why does as-complete value matter so much on a construction file?
Because it describes a building that does not exist yet. The recoverable value today is land plus work in place, which is usually far lower. Canadian securities regulators specifically required independent as-is appraisals for syndicated mortgage offerings for this reason.
Is a second charge behind a construction loan a reasonable investment?
It is among the sharper risks in private lending. The second absorbs shortfall first, and on a stalled project the accruing interest, taxes, insurance and site costs consume the residual that would repay it. It can be reasonable at the right price with the right disclosure, but it should never be presented as comparable to a completed-property second.