Construction Mortgage Investments: Draws, Holdbacks and Cost to Complete

In most mortgage investments the security already exists on the day the money is lent: a finished house, an operating apartment building. Construction mortgage investments are different. The lender’s money pays for the building that will later secure it, so for months the collateral is a site, a foundation or a half-framed structure whose value depends on the project being finished.

That is why they are usually priced higher than loans on finished property, and why they need a different kind of due diligence. This guide explains how construction loans are advanced and controlled, what holdbacks and cost to complete mean, where the risks lie, and what an investor can check. This is general education, not investment, tax or legal advice.

What are construction mortgage investments?

Construction mortgage investments are loans that fund the building of a project, advanced in stages as work is done and secured by a mortgage on the land and everything built on it. The project can be a single custom home, an infill multiplex, a row of townhouses or a larger condominium or rental building.

The loan is repaid when the project is finished, either from the sale of the completed units or from a “takeout” loan, a conventional mortgage that refinances the construction loan once the building is complete and, for rental property, leased. Because an unfinished project earns no income, interest during construction is often paid from an interest reserve, a part of the loan set aside for that purpose.

Construction lending sits next to development financing. A development or land loan comes earlier, while the site is being approved and serviced; a construction loan funds the build itself. The earlier stage carries its own risks, explained in development financing as an investment. Terms used here, from “draw” to “takeout”, are defined in the mortgage investment glossary.

How do construction draws work?

A construction loan is released in draws, each tied to work that has been completed and verified. Draws control the lender’s exposure: money goes out only as value is added to the site.

A typical draw process has five controls:

1. Equity first. The borrower’s own money, often the land or a cash contribution, goes into the project before the lender advances, so the borrower absorbs early losses.
2. An approved budget. An independent cost consultant, often a quantity surveyor, reviews the borrower’s budget before the loan closes and confirms it is complete and realistic, including a contingency for surprises.
3. Verified progress. Before each draw the consultant inspects the site and reports the percentage of work completed, the costs incurred and the cost to complete.
4. Clean title. The lender’s lawyer searches title for new liens or charges registered since the last advance.
5. Paid trades. The builder provides evidence, such as statutory declarations, that trades and suppliers paid from the previous draw have been paid.

Draws are often paid through the lender’s lawyer or directly to trades, so the money reaches the work it was meant for. Each control depends on the people running it. A consultant who inspects carelessly, or invoices that overstate costs, can let money out ahead of value.

Cost to complete: the number that decides whether the loan is covered

Cost to complete is the amount still needed to finish the project, including hard costs (labour and materials), soft costs (design, permits, financing, insurance) and the remaining contingency. It is the single most important number in a construction loan file.

Lenders test it against the money left: the undrawn loan plus any equity the borrower still has to contribute. If that total is at least the cost to complete, the loan is “in balance”. If it is not, the loan is out of balance, and the lender normally stops further draws until the borrower deposits the difference.

A loan can fall out of balance quickly. Material prices rise, a trade walks off the job, a design change adds work, or a delay extends the interest bill. Each time the consultant updates cost to complete, the lender learns whether its exposure has changed. An investor in a construction loan, or in a pool that holds them, needs to know how often that test is run and what happens when it fails.

What is a holdback, and why does it matter to the lender?

A holdback is money kept back from a payment until a condition is met. In construction lending the word has two separate meanings, and neither protects the investor’s return.

The statutory lien holdback. Each province has construction or builders’ lien legislation; in Ontario it is the Construction Act. In general terms, these statutes give unpaid contractors, subcontractors and suppliers a lien against the property they improved, and require the owner, and others who pay contractors, to retain a holdback from each payment for a set period so unpaid trades have a fund to claim against. The percentage, the holding period, the release rules and how lien claims rank against a mortgage are set by each province’s statute and differ. If holdbacks are not handled properly, lien claimants may in some circumstances rank ahead of some of a mortgage lender’s advances. That is why lenders search for registered liens before each draw. A lawyer in the province where the project is located is the right source for how the rules apply.

The lender holdback. Separately, a lender may keep back part of the loan until a milestone, such as occupancy, final completion or a set level of unit sales. This limits the amount at risk before the project proves itself.

Construction loan investment risk: what can go wrong

Construction loan investment risk comes from the gap between the money advanced and what the site would sell for if work stopped. Every risk on the list below widens that gap.

• Cost overruns that the borrower cannot fund.
• Delays from weather, labour, supply or inspections, which add interest and use up the reserve.
• Builder failure, leaving a site to be re-tendered to a new contractor at a higher price.
• Lien claims from unpaid trades, which cost time and money to resolve.
• Permit or inspection problems that halt work.
• Market change between start and finish. The as-complete value is a forecast; a market fall before completion cuts it.
• A failed exit, when buyers do not close or a takeout lender declines to refinance.
• Draw fraud, where invoices are inflated or money is diverted.

The underlying problem is a value cliff. A finished building has a market; a part-built one often does not, because a buyer must take on the unfinished work, its liens and its unknowns. The as-is value of a stalled site can fall below what was spent on it.

Worked example (illustrative)

Assume four freehold townhouses on an infill lot in Hamilton, Ontario. All figures are round, illustrative assumptions, not a real project or current rates.

1. Costs: land $1,000,000 plus construction budget (hard and soft costs, including contingency) $2,000,000 = total cost $3,000,000.
2. Value: the appraisal gives an as-complete value of $3,600,000.
3. Loan: a $2,400,000 commitment, which is 80% of cost ($2,400,000 ÷ $3,000,000) and 66.7% of as-complete value ($2,400,000 ÷ $3,600,000).
4. Equity first: the borrower contributes $600,000 toward the land; the loan funds the remaining $400,000 of land cost and then $2,000,000 of construction draws.
5. Lender fee: assume 2% of the commitment, $2,400,000 × 2% = $48,000. Interest is paid monthly while the project stays on budget.
6. The problem: after construction draws of $1,200,000 (60% of the construction budget), the loan balance is $400,000 + $1,200,000 = $1,600,000 and $800,000 is undrawn. The consultant reports that cost to complete is now $1,100,000. The loan is out of balance by $1,100,000 − $800,000 = $300,000.

The lender now faces three outcomes:

Three points follow. At the moment of trouble the as-is loan-to-value was $1,600,000 ÷ $1,500,000, about 107%, although the loan had looked comfortable at 66.7% of as-complete value. The $48,000 fee and the interest received before the problem are small against a $250,000 principal loss. And funding the overrun protects the project only if the market holds until it is sold.

Interest and fees are taxable when received if held outside a registered plan, and the tax treatment of a principal loss depends on how the investment is held. Tax content is as at October 2026; confirm your position with a Canadian tax professional. Mortgage investments are not guaranteed. Returns are targets, not promises, and principal can be lost.

Benefits and risks of construction mortgage investments, side by side

Construction lending offers real features in return for its risks, and each feature has a matching weakness. The table sets them on the same rows.

Higher return comes with higher risk. A yield that looks generous against a loan on a finished house reflects the extra ways a construction loan can fail.

How provincial rules affect construction lending

Construction lending is shaped by provincial law at three points: lien legislation, enforcement and the licensing of the people who arrange and administer the loan. This summary is current as of October 2026.

• Lien legislation. Each province has its own construction or builders’ lien statute (in Ontario, the Construction Act) with its own holdback percentage, timelines and priority rules. Do not assume one province’s rule applies elsewhere.
• Enforcement. In Ontario, enforcement is usually by power of sale under the Mortgages Act. British Columbia uses judicial foreclosure and court-ordered sale; Alberta’s process is court-supervised; Québec uses hypothecary recourses. On a stalled project, lenders may also seek a court-appointed receiver to manage or sell the site.
• Licensing. In Ontario, FSRA licenses mortgage brokerages, agents and administrators. In British Columbia, BCFSA regulates, and the Mortgage Services Act is scheduled to come into force on 13 October 2026, making mortgage lending and administration licensed activities; check BCFSA for licensing categories. In Alberta, RECA regulates mortgage brokers; in Québec, the AMF.
• Syndicated construction loans. Construction projects are sometimes financed by syndicated mortgages sold to many investors. Canadian Securities Administrators amendments in force from 1 March 2021 (1 July 2021 in Ontario and Québec) withdrew the private issuer and “mortgages” prospectus exemptions for syndicated mortgages and added appraisal requirements for offering memorandum distributions.

Due diligence for a construction mortgage investment

Each item names the document where the answer is found. The general version is in the mortgage investor’s due diligence checklist.

• Budget and contingency — the cost consultant’s initial report.
• As-is and as-complete values — the appraisal; see appraisals for mortgage investors.
• Permits and approvals — the building permit and municipal approvals.
• Builder’s experience and contract — the construction contract and any licence or warranty registration the province requires.
• Borrower’s equity in first — the sources-and-uses statement and the lawyer’s reporting letter.
• Draw conditions — the mortgage commitment.
• Each draw — the consultant’s draw report, the title subsearch and the builder’s statutory declarations.
• Lien holdback compliance — confirmation from the lender’s lawyer.
• Insurance — the builder’s risk (course of construction) policy naming the lender.
• Interest reserve size and use — the loan budget.
• Exit — the takeout commitment, or presale agreements and how deposits are held.
• For a pooled investment — the offering memorandum’s limit on construction exposure and the audited financial statements’ breakdown of loans by type and status.

Common mistakes in construction mortgage investing

• Judging the loan only by as-complete loan-to-value. The as-is value is what a lender would sell if work stopped.
• Treating holdbacks as a cushion for investors. Lien holdbacks protect trades; lender holdbacks limit exposure but do not create value.
• Accepting a structure where equity goes in last. Equity that arrives after the lender’s money absorbs nothing early.
• Reading interest paid from a reserve as proof the borrower can pay. It is the lender’s own advance coming back.
• Assuming a short term means low risk. Delays turn short loans into long ones, and a borrower default on a part-built project is slower and costlier to resolve than one on a finished home.
• Overlooking the exit. Presales that do not close, or a takeout lender that declines, leave the construction lender holding a finished building it did not plan to own. How fast it sells is covered in property value and marketability risk.

What this means for a mortgage investor

Construction mortgage investments fund buildings that do not yet exist, so the lender’s protection depends on draw controls, an accurate cost to complete and a market that holds until the project is sold. The worked example shows how a loan at 66.7% of as-complete value can lose principal when a project stalls. Any construction loan, or pool that holds them, should be read on the seven axes on which every mortgage investment varies: the borrower, the property, the loan-to-value, the security position, the term, the jurisdiction and the investment structure.