Construction Mortgage in Canada (2026): Progress Draw vs Completion, Priced Out

Construction Mortgage in Canada (2026): Progress Draw vs Completion, Priced Out

Short answer: A construction mortgage funds a home that does not exist yet, so the lender refuses to advance the full loan against a vacant lot and a set of drawings. With a progress-draw mortgage, money is released in stages as the build reaches verified milestones: an inspector confirms the work is in place, the lender advances the next slice, and you pay interest only on the balance drawn so far. With a completion mortgage, the lender advances nothing during the build and funds the whole mortgage once the home is finished, inspected, and ready for possession. The progress-draw route is the common one for self-builds and custom homes. The completion route is simpler for the buyer and much harder to find, because the builder has to carry the entire cost of the build until the keys change hands.

Two ground rules for this guide. Every dollar figure in the worked example is a labelled hypothetical with the rate and timeline printed beside it; your lender's schedule will differ. And construction financing sits at the junction of mortgage rules, provincial lien law, and a builder contract. This is education, not mortgage, legal, or tax advice, and the builder contract deserves a lawyer's read before the mortgage does.

The two structures, side by side

Most confusion in this corner of the market comes from treating "construction mortgage" as one product. It is two, with opposite cash-flow shapes.

	Progress-draw mortgage	Completion mortgage
When money moves	In stages, after inspections, as work is completed	Once, at possession, after final inspection
Who carries the build cost mid-project	The lender, draw by draw, behind the work	The builder, entirely, until the home is done
What you pay during the build	Interest only, on the drawn balance	Nothing on the mortgage; your deposit sits with the builder
Inspections	One before most draws; insurer programs publish how many they cover	A final inspection or appraisal before funding
Rate exposure	The term usually starts at completion; the rate hold has to survive the build	Often arranged up front, but funding still depends on you qualifying at completion
Typical use	Self-builds, custom homes, major builds on land you own or are buying	Production homes from established builders who can finance construction themselves

There is also a hybrid worth knowing about: some files start as a progress-draw facility during construction and convert into the long-term mortgage on completion, so the borrower deals with one lender and one approval track. Ask which structure you are actually being quoted. "Construction mortgage" on a rate sheet tells you nothing until the draw mechanics are spelled out.

Buying a new home from a production builder usually looks different again. The builder finances construction with its own facilities, you pay staged deposits under the purchase agreement, and your mortgage is effectively a completion mortgage arranged for closing day. The progress-draw machinery in this guide matters most when the land and the build contract are yours: a self-build, a custom home with a general contractor, or a teardown and rebuild.

How a progress draw actually runs

The approval is a construction file, not just a borrower file. On top of the usual income, credit, and down payment underwriting, the lender or insurer takes the building plans, the fixed-price or cost-plus builder contract, cost estimates, and building permits, and reviews the project's cash flow against the proposed draw schedule. Insured files have published program rules behind them. Canada Guaranty's progress-draw program, for example, requires title to the land to be in the borrower's name on or before closing, has the lender collect plans, cost estimates, building contracts, and permits, and makes the lender responsible for managing holdbacks. Borrowers qualify at the stress-test rate, the greater of the contract rate plus 2% or 5.25%, the same minimum qualifying rate that applies across insured mortgages and that our stress test guide works through in detail.

The appraisal is "as if complete," and the loan is capped at the lower number. The lender orders an appraisal of the finished home's projected value. Lending guidance in this market is consistent on the point that matters: the lender finances against the lesser of the full cost to complete and the appraised value as if complete. If your build costs $650,000 all-in but appraises at $600,000 finished, the lending math starts from $600,000, and the $50,000 gap is your cash, found before or during the build, not the lender's surprise at the end.

Draws follow a published schedule, in arrears. A typical insurer and lender schedule looks like this. Percentages are of the approved loan, and lenders vary the staging, so treat this as the standard shape, not a promise:

Draw	Verified stage	Cumulative advance
1	Excavation and foundation complete (about 15% of the build)	15%
2	Roof on and building weather-tight (about 40%)	40%
3	Plumbing, wiring, and heating roughed in, walls up (about 65%)	65%
4	Interior finishes: cabinets, fixtures, flooring (about 85%)	85%
5	Complete and ready for occupancy (100%)	100%

"In arrears" is the phrase to hold onto. The work happens first, the inspector verifies it, then the money moves. Neither you nor your builder gets draw three because drywall is scheduled next week. The practical consequence is working capital: the builder fronts labour and materials between draws, or you do, and a builder contract that assumes the lender pays in advance will stall at the first inspection.

Inspections gate every draw, and someone pays for them. Under Canada Guaranty's full-service progress-draw program, the insurer orders all inspections and authorizes the draws, and pays for up to four progress advance inspections. Files outside an insurer-managed program use lender-ordered inspections or appraisals at each stage. Either way, budget for inspection and appraisal costs in the project's soft costs, and ask at approval, in writing, how many inspections the program covers and what each additional one costs. A five-draw build with complications can need more visits than the base schedule.

You pay interest only, on a climbing balance. During construction there is no principal repayment. Each month you pay interest on what has been advanced to date. The first months are cheap because the balance is small. The last months before completion are the expensive ones. Section six below prices this out.

Insured progress draws have hard ceilings. For insured files, Canada Guaranty's published program caps purchase financing at 95% loan-to-value for one- to two-unit homes and 90% for three- to four-unit homes, with the property value below $1,000,000 where the loan-to-value is 80% or less, and below $1,500,000 where it is above 80%. Those ceilings plug straight into the insured mortgage framework, including the premium schedule: the same 4.00% / 3.10% / 2.80% loan-to-value bands worked through in our CMHC premium guide apply to insured construction files. Whether a high-ratio progress draw is even available for your project type is an approval question; many custom builds end up as conventional files with 20% or more down because the land, the property type, or the value falls outside the insured box. Our insured vs insurable vs uninsurable explainer lays out which bucket a given file lands in and why it changes the rate you are offered.

The 10% holdback: the money that moves late on purpose

Running beside the lender's draws is a second, legally mandated delay that surprises almost every first-time builder: the construction lien holdback.

Provincial lien legislation exists so that unpaid subcontractors and suppliers can claim against the property they improved. The mechanism is the holdback. Under Ontario's Construction Act, every payer in the chain, owner to contractor, contractor to subcontractor, is required to hold back 10% of every payment. The holdback is security for liens. It is generally releasable once the period to preserve a lien has expired, which runs 60 days from the triggering events the Act sets out, such as publication of the certificate of substantial performance. An owner who wants to set off against the holdback for deficiencies has to publish a notice of non-payment within the Act's window, 40 days after substantial performance. Other provinces run their own builders lien statutes with their own holdback percentages and timelines, so the Ontario numbers in this section are an example of the pattern, not a national rule.

Three practical consequences for a residential build:

1. Your builder is financing part of your house. On a $400,000 build contract, 10% is $40,000 that moves through the project in arrears and lands after the lien period, not at substantial completion. Builders price this into their margins and their progress billing. A rock-bottom quote from a builder who has not accounted for holdback cash flow is a risk, not a bargain.
2. The lender manages holdbacks on insured draws. Insurer program documents put holdback management on the lender for progress-draw files. Your lawyer or notary typically tracks the lien period and the release. Do not release holdback money early because the builder asks nicely; releasing early can leave you paying twice if a lien lands, once to the builder and once to clear title.
3. Substantial performance is a legal milestone, not a feeling. The lien clock keys off events like the certificate of substantial performance. Know who issues it on your project, because the 60-day count and your final payments hang off it.

Worked example: a $400,000 build, a $320,000 loan

Here is the cash-flow shape of a progress draw, computed from printed assumptions. This is an illustration, not a quote:

• You already own the lot (the land piece matters, and it is handled below).
• Fixed build contract: $400,000. Approved construction loan: $320,000, which is 80% of the build cost. Your $80,000 of equity goes in along the way, and overruns are yours.
• Build time: 10 months. Draws land at months 2, 4, 6, 8, and 10 on the typical schedule above.
• Construction-period rate: a hypothetical 6.00% a year, interest only, calculated monthly on the drawn balance. Actual construction pricing varies by lender and file and is often higher than the rate on the finished mortgage.
• At completion the $320,000 converts to a regular mortgage. The payment shown uses a second hypothetical rate, 4.50% on a 25-year amortization with Canadian semi-annual compounding.

Stage	Draw	Loan balance	Interest for the stage's 2 months at 6.00%
Foundation (15%)	$48,000	$48,000	$480
Weather-tight (40%)	$80,000	$128,000	$1,280
Roughed-in (65%)	$80,000	$208,000	$2,080
Finishes (85%)	$64,000	$272,000	$2,720
Occupancy (100%)	$48,000	$320,000	converts to the finished mortgage

Total interest-only cost across the build: $6,560. Then regular payments begin: $1,771 a month on the $320,000 at the hypothetical 4.50% over 25 years.

Read the table the way the lender does. Your cost of borrowing during construction is small next to the price of the build, but it arrives while you are also paying for wherever you currently live, plus your $80,000 equity share, plus soft costs (permits, inspections, appraisals, legal) that sit outside the build contract. The holdback adds one more timing wedge: of that $400,000 contract, $40,000 is held back in slices and released after the lien period, which your builder has to be able to carry.

Two sensitivities decide whether this stays comfortable. The first is time. Stretch the build from 10 months to 14 at the higher balances and the interest-only bill grows by roughly the monthly rate on the drawn balance for every extra month: at a $272,000 balance and 6.00%, each extra month is about $1,360, and delays do not pause the meter once money is out. The second is overruns. The loan is fixed at $320,000. A $30,000 overrun is cash you produce mid-build, at the worst possible moment, or the project stops. A contingency line in the budget is not pessimism; it is the mechanism that keeps a draw schedule from becoming a lien schedule.

If there is land to buy as well, it does not fold neatly into this table. Land is commonly financed separately or taken as the first advance problem: raw land has no building on it to appraise as complete, lenders treat it as riskier collateral, and the down payment expectations are higher than on a finished home. Ask how the land purchase and the construction facility fit together before you write the land offer, not after.

The completion mortgage, and its quiet risk

The completion mortgage inverts everything. You sign a purchase agreement with a builder, pay deposits on the builder's schedule, and the mortgage funds once, at possession, after the finished home passes inspection. No draws, no interest during the build, no holdback administration on your side. For buyers purchasing from established builders, this is the default experience, and during the build your only financing job is keeping your qualification intact.

The quiet risk sits at the end. Funding at completion depends on you still qualifying when the home is done and on the finished home appraising at the value the approval assumed. On long builds, rate holds, often 90 to 120 days, expire long before possession, so the rate you discussed at signing is not the rate you get; the contract rate is set near closing. Income changes, new debts, or a lower appraised value at completion all land on the buyer at the worst moment, when deposits are committed and the home is built. Our guides to mortgage pre-approval and appraisal gap risk cover the two halves of that exposure: what a pre-approval does and does not guarantee, and how a shortfall between contract price and appraised value is funded. The defences are boring and effective: keep the file clean during the build (no new car loan, no job hop without advice), keep a cash buffer outside your deposits, and confirm how your builder's deposit schedule interacts with your financing before the first cheque.

Self-builders occasionally ask why they cannot simply have a completion mortgage and skip the draw machinery. The answer is the table above: someone has to pay the framers in month three. A completion structure means that someone is the builder, which is why it is mostly offered by builders with the balance sheet to carry a project, and why custom builders working on your land generally will not touch it.

Taxes and closing on a newly built home

A newly built home is not taxed like a resale. GST, or the federal part of HST, applies to new housing, which changes the closing math and the mortgage math (the tax is generally part of the price the lender and insurer work from, per the purchase agreement). First-time buyers may qualify for the federal first-time home buyers' GST rebate, and our GST rebate guide works through the eligibility rules, the $1 million full-relief threshold, and the phase-out to $1.5 million in detail. Provincial new-housing rebates and land transfer taxes layer on top by province; our Ontario closing cost guide prices the Ontario stack, and the closing-cost series covers BC, Quebec, Alberta, and the other provinces. One Ontario-specific item belongs on a new-build checklist even though it is not a tax: new homes in Ontario carry a statutory warranty administered by Tarion, with enrolment and claim rules that differ from anything in the resale market. Confirm your builder is registered and the home is enrolled before you close, not after a defect appears.

If your plan involves selling a current home to fund the build, sequencing closings is its own problem. Bridge financing exists for the gap between a purchase closing and a sale closing, but it does not manufacture equity during a ten-month build, and most construction timelines are managed by renting, family, or a budgeted overlap rather than a bridge you hope for.

Failure modes worth planning around

Cost overruns. The loan amount is approved against a budget. Reality edits budgets. The gap between the approved loan and the final cost is borrower cash, and it tends to be demanded mid-project. A fixed-price contract with a named allowance schedule, plus your own contingency you control, is the standard defence.

Draw friction. Inspections take scheduling, and an inspection that finds a stage incomplete (weather-tight means weather-tight) delays the draw, which delays the builder's payment, which can slow the build. The draw schedule in the builder contract and the lender's draw schedule need to be the same document in substance. Read them side by side before signing either.

Builder insolvency or abandonment. Money already advanced is secured against a partially built home. This is the scenario holdbacks, inspections, and staged advances exist to soften, and the reason your lawyer's review of the builder contract, and checks that the builder is licensed or registered where your province requires it, happen before draw one.

Appraisal shortfall at completion. If the finished home appraises below the value used at approval, the lender can reduce the final advance. The lesser-of rule (cost to complete vs as-if-complete value) applied again, at the finish line. Market movement during a long build cuts both ways and you only control the buffer you kept.

Rate drift during the build. Your construction-period pricing and your finished-mortgage rate are set at different times. Rate holds are usually far shorter than build timelines, so the finished rate is a closing-date fact. Our explainer on how mortgage rates are set covers why the finished rate will follow bond yields for fixed terms or the policy rate for variable ones, whatever either does while your house is being framed.

Which structure fits which buyer

Take the progress draw when the land and the contract are yours, when you have the equity share plus contingency in reachable cash, and when you can supervise a project: document requests, inspections, and a builder billing against stages. You trade administrative load for control and for interest that only accrues on money actually out the door.

Take the completion structure when you are buying from a builder who carries construction, and put your effort into the two things you control: deposit protection (what the agreement and your province's rules say about your money if the project fails or the price changes) and keeping your mortgage file fundable for a possession date that may be a year or more out.

In both structures, the underwriting basics do not move: income documentation, debt service at the stress-test rate, and a down payment that survives contact with the lesser-of appraisal rule. What changes is the sequence of risks. A construction file front-loads verification and pays for certainty stage by stage. It rewards buyers who read schedules carefully and punish, in cash, buyers who assume the money simply arrives.

Frequently asked questions

How many draws does a construction mortgage have?

Publisher schedules from insurers and lenders typically run four to five advances tied to verified stages: foundation, weather-tight or lock-up, roughed-in services, interior finishes, and occupancy. Canada Guaranty's progress-draw program pays for up to four progress advance inspections under its full-service option, which is why five-draw files sometimes carry an extra inspection cost. Your approval will state the schedule; nothing about the count is standard enough to assume.

Do I make regular mortgage payments during construction?

No. During the build you pay interest only, monthly, on the amount advanced to date. Principal repayment starts when the loan converts to the finished mortgage at completion. In the worked example above, that meant $6,560 of interest-only payments across a 10-month build, then $1,771 a month at the hypothetical finished rate.

What is the 10% holdback on a home build?

Provincial lien law requires payers to hold back a percentage of each payment as security against construction liens from unpaid subcontractors and suppliers. In Ontario the holdback under the Construction Act is 10%, and it is generally released after the 60-day lien preservation period expires following substantial performance, unless a notice of non-payment is published within the Act's 40-day window. On a $400,000 build contract the holdback is $40,000, which is why builders treat it as a financing term, not a footnote.

Can a construction mortgage be insured with less than 20% down?

Yes, within the insured programs' boxes. Canada Guaranty's progress-draw program allows up to 95% loan-to-value on one- to two-unit purchases and 90% on three- to four-unit homes, under the same property-value ceilings as insured mortgages generally (below $1 million at 80% loan-to-value or less, below $1.5 million above 80%). Premiums follow the standard insured schedule. Many custom builds still land as conventional loans because the property, the land position, or the value falls outside an insured program's rules.

What rate do I qualify at for a construction mortgage?

At the minimum qualifying rate used across insured mortgages: the greater of your contract rate plus 2% or the 5.25% benchmark. The lender also underwrites the project itself, plans, contract, permits, and cost estimates, and caps the loan using the lesser of the cost to complete and the appraised value of the finished home.

How long can a construction mortgage take?

Construction periods are set in the approval and priced by the lender; a production home may take four to eight months and a custom build eight to twelve months or longer. Every month of delay at a drawn balance costs interest: in the worked example, one extra month at a $272,000 balance and a hypothetical 6.00% is about $1,360. Rate holds of 90 to 120 days will not span a full build, so the finished mortgage rate is set near completion.

What happens if the build goes over budget?

The approved loan does not grow. Overruns are paid from your cash or negotiated into a revised approval, which means new appraisal and underwriting, not an automatic top-up. This is why the equity share, the contingency, and the fixed-price contract's allowance schedule matter more than the draw percentages.

Is a completion mortgage safer than a progress draw?

It removes draw administration and interest during the build, but it concentrates risk at the end: you must still qualify at possession, the finished home must appraise at the approved value, and your deposits have been with the builder throughout. Progress draws spread the verification across the build. Neither is safer in the abstract; they fail in different places, and the failure point you can best defend against should drive the choice.

The bottom line

A construction mortgage is a payment system designed around one fact: the collateral does not exist yet. The lender pays in arrears against inspected work, the lien holdback pays late on purpose, and the borrower pays interest only on what has actually been advanced. Get the draw schedule in the builder contract to match the lender's, keep equity and contingency outside the loan where you can reach them, and treat the appraisal's as-if-complete value as the number the whole file stands on. Do those three things and the structure works the way it was designed to. Skip them and the same structure delivers its lessons at framing stage, in cash.

---

Sources and method: Canada Guaranty, Home Improvement / New Construction program guide (progress-draw underwriting: land title in borrower name, lender-collected plans, cost estimates, contracts and permits, lender-managed holdbacks, up to four insurer-paid progress inspections under full service, maximum 95% LTV for one- to two-unit and 90% for three- to four-unit purchases, property-value ceilings of $1,000,000 at or below 80% LTV and $1,500,000 above 80%, qualification at the greater of contract rate plus 2% or 5.25%, and the standard insured premium bands). Draw staging (15% foundation, 40% weather-tight, 65% roughed-in, 85% finishes, 100% occupancy) reflects typical published lender and insurer schedules (Canada Guaranty program materials; GTA-Homes and CalgaryHomes construction-mortgage guides) and varies by lender. Advances-in-arrears mechanics and funding against the lesser of cost to complete versus appraised as-if-complete value: Calgary Real Estate Board pre-construction financing guidance quoting lender practice. Ontario Construction Act holdback (10%), 60-day lien preservation, and 40-day notice-of-non-payment windows: Ontario Construction Act summaries by Lexpert, McCarthy Tetrault, and Lexology. Completion mortgage mechanics (single advance at possession after final inspection; builder carries construction cost): CanadaLend and Poetry Homes construction-mortgage guides. Rate holds of 90 to 120 days: lender practice summarized in Lamont Land's fixed-vs-variable construction guide. All prices, rates (6.00% construction period, 4.50% finished), timelines, and the $400,000 build / $320,000 loan figures are labelled hypothetical illustrations computed from those stated assumptions. This article is educational and informational only and is not mortgage, legal, or tax advice. Construction financing terms, holdback law, and warranty programs vary by lender and province; review your builder contract and financing with qualified professionals before signing.