Construction Mortgages in Ontario: Bank and Private Construction Financing Explained
Building a new home is very different from buying an existing home, and financing the project is equally different.
With a conventional mortgage, the lender advances money against a completed property that can be appraised, inspected, occupied and sold.
With a construction mortgage, the lender is financing an asset that does not yet fully exist.
That single distinction explains why construction mortgages in Ontario involve progress draws, inspections, appraisals, construction budgets, lien holdbacks, and much closer scrutiny of the project itself.
It also explains why a borrower with excellent income and credit can easily qualify for a conventional mortgage and still struggle to get construction financing.
The borrower is only one part of the application.
The lender must also approve the construction project and the security.
Quick Answer: How Does a Construction Mortgage Work in Ontario?
A construction mortgage finances a home build in stages rather than advancing the full mortgage at once. The lender approves the borrower, construction plans, budget, property, builder and anticipated completed value. The lender then advances funds through progress draws as construction milestones are reached.
Bank construction financing is arranged before construction begins.
Private construction financing offers another option when a project doesn’t fit conventional bank construction guidelines, including certain partially completed projects. Strong private construction first mortgages can currently be priced in approximately the 8%–10% range, with lender, broker, appraisal and legal costs additional.
The most important rule is simple:
Arrange your construction financing before you start building.
What Is a Construction Mortgage?
A construction mortgage is financing specifically designed to fund the construction of a residential property.
Unlike a conventional purchase mortgage, the lender doesn’t necessarily advance the full approved amount at closing.
Instead, money is released as construction progresses.
This is commonly called a progress-draw mortgage.
The lender might advance funds after milestones such as:
- Land acquisition or initial construction
- Foundation completion
- Framing and roof completion
- Plumbing, electrical and mechanical installation
- Interior completion
- Final occupancy and completion
The exact draw schedule depends on the lender and project.
The key point is that the lender controls fund releases as the value of its security increases.
Why Construction Lending Is Different
Suppose a lender advances $500,000 against a completed home worth $800,000.
If the borrower defaults, the lender has a completed residential property securing its mortgage.
Now consider advancing $500,000 against a construction project.
The lender could eventually hold security consisting of a foundation, framing, an unfinished roof, exposed mechanical systems, or a partially completed interior.
Those properties are considerably harder to sell.
The potential purchasers are no longer ordinary homebuyers. The market can narrow to builders, contractors, investors, and cash purchasers willing to assume the construction risk.
Those purchasers expect a substantial discount.
That is why construction lenders focus heavily on one fundamental question:
If something goes wrong, what is our security worth and how readily can we sell it?
How Banks Underwrite Construction Mortgages
A bank construction mortgage involves three separate underwriting considerations.
- The Borrower
The bank assesses the same fundamental borrower characteristics it would consider with other mortgage applications:
- Income
- Credit history
- Debt servicing
- Net worth
- Available liquidity
- Source of down payment and construction equity
A strong borrower is important.
However, qualifying personally does not mean the construction project qualifies.
- The Property and Project
The lender must also evaluate:
- Land value
- Existing improvements
- Architectural plans
- Building permits
- Construction budget
- Construction schedule
- Current value
- Estimated completed value
- Amount already invested
- Remaining cost to complete
- Contingency funds
- Marketability of the completed property
The appraisal becomes particularly important.
The lender needs to understand both today’s value and the anticipated value once construction is complete.
- The Construction Process
The lender must also be comfortable that the proposed home can actually be completed.
That includes reviewing who is responsible for construction, the project’s permits and approvals, construction progress, and how additional funds will be released.
In Ontario, licensed new-home builders operate within the provincial HCRA and Tarion regulatory framework.
This gives lenders an objective way to verify a professional new-home builder’s status, rather than relying on someone describing themselves as a contractor.
Legitimate owner-built homes are a separate category and must be considered according to the lender’s individual construction-financing policies.
Why the Builder Matters
Construction lending ultimately turns an unfinished property into completed mortgage security.
The person responsible for accomplishing that matters.
There are many excellent contractors in Ontario. However, being a contractor does not automatically mean someone has the qualifications, regulatory status, or experience to manage an entire new-home construction project.
Where a professional new-home builder is involved, the lender can examine applicable licensing and regulatory information.
The lender is therefore assessing more than the borrower’s ability to make mortgage payments.
It assesses whether the construction team can successfully create the completed asset the lender ultimately relies on.
How Progress Draws Work
A conventional construction lender typically does not give the borrower the entire approved construction mortgage at the start.
Funds are advanced progressively.
For example, a borrower completes an agreed construction stage.
The lender then requires confirmation of progress. Depending upon the lender and stage, this can involve an inspection or progress appraisal.
The solicitor must also ensure that the lender’s security remains protected and that applicable construction-lien requirements have been addressed.
Only then is the next advance released.
The process repeats until construction is complete.
This protects the lender from advancing substantially more money than the value that has actually been created in the property.
It also means the borrower requires careful cash-flow planning.
A construction mortgage does not eliminate the need for construction capital.
The borrower often needs enough liquidity to pay contractors and suppliers while waiting to reach the next draw milestone.
The 10% Construction Lien Holdback
Ontario construction projects are also subject to the holdback provisions of the Construction Act.
The statutory holdback is generally 10% of the price of services or materials supplied under the applicable contract.
This is frequently misunderstood.
It does not simply mean that a bank arbitrarily keeps 10% of the borrower’s mortgage.
The holdback is part of Ontario’s construction-lien system and is intended to protect lien claimants throughout the construction process.
Construction lenders and their solicitors therefore pay close attention to lien exposure before releasing mortgage advances.
Why Are Bank Construction Mortgage Rates So Difficult to Find?
Consumers can easily find advertised rates for conventional five-year fixed and variable mortgages.
Construction mortgage pricing is different.
Major banks advertise construction and progress-draw financing programs, but detailed construction rates are not always publicly posted in the same manner as conventional residential mortgage rates.
There is a reason.
Construction lending depends heavily on the individual transaction.
The lender is evaluating the borrower, property and construction project together.
A strong borrower with substantial equity, an experienced builder, conservative loan-to-value, straightforward construction plans and a highly marketable completed property represents a very different risk from a complicated project with limited equity and uncertain completion.
The financing structure and pricing therefore depend upon the application.
Some bank construction facilities can use variable-rate closed structures. Other construction financing arrangements can carry different terms and conditions.
There is no useful one-size-fits-all construction mortgage rate that applies to every project.
Arrange Financing Before You Start Building
This is one of the most important pieces of advice for anyone planning to build a home.
Arrange your construction financing before construction begins.
The lender wants an opportunity to review the project before its money and security become exposed.
That allows the lender to assess:
- Plans
- Permits
- Builder
- Budget
- Land value
- Borrower equity
- Construction schedule
- Appraised completed value
- Draw structure
- Contingency reserves
Starting construction first and looking for financing later creates an entirely different underwriting problem.
The lender’s immediate question becomes:
Why are you coming to us now?
That question can lead to several others.
Why was construction financing not arranged originally?
Has the project exceeded its budget?
Has the borrower exhausted available cash?
Has the construction plan changed?
How much money is required to finish?
Is the remaining budget realistic?
Who will complete the project?
What happens if construction stops again?
These questions can make conventional financing much harder.
Financing a Partially Completed Home
A partially completed home presents one of the most challenging construction-financing situations.
Consider a house that is 40% complete.
The borrower might have excellent income, strong credit and substantial net worth.
Those strengths do not change the physical condition of the lender’s proposed security.
If the lender had to enforce its mortgage today, it would not be selling a finished family home.
It would be selling an unfinished construction project.
That substantially reduces the potential buyer pool.
The lender must therefore determine:
- Current as-is value
- Percentage complete
- Remaining cost to complete
- Existing liens or construction obligations
- Amount of additional financing required
- Who will complete construction
- Expected completed value
- Marketability if the project fails
This is why saying, “I qualify at the bank,” is not the same as saying “the bank will finance my construction project.”
They are two separate underwriting decisions.
Why Banks Want Construction Financing Arranged From the Beginning
A bank construction lender wants control over its risk from the beginning.
When financing is established before construction, the lender knows what was approved.
It has reviewed the original plans.
It has reviewed the budget.
It understands the expected value.
It knows the borrower’s original equity contribution.
It establishes the draw process.
It can monitor the increasing value of its security as construction proceeds.
When a lender is approached halfway through construction, it inherits a project it did not originally approve.
That is considerably different.
The bank must reconstruct what has already happened and determine whether advancing additional money is prudent.
For this reason, borrowers should never assume that because a bank offers construction mortgages, the bank will automatically take over an existing partially completed project.
Private Construction Financing in Ontario
This is where private construction mortgages become important.
Private lenders can consider construction projects that do not fit conventional bank construction programs.
That does not mean private lenders ignore risk.
Quite the opposite.
A private lender concentrates heavily on the underlying security, equity position, current property value, cost to complete and exit strategy.
The difference is that a private lender can be much more flexible in deciding which risks it is willing to accept.
Private construction financing can be appropriate for situations involving:
- Partially completed homes
- Construction already underway
- Unusual properties
- Time-sensitive financing
- Construction cost overruns
- Projects outside conventional bank guidelines
- Borrowers requiring a more flexible financing structure
Every project must still make financial sense.
Private money cannot fix a project where the numbers simply do not work.
What Does a Private Construction Mortgage Cost?
Private construction financing is priced according to risk.
For a strong first-position residential construction mortgage, interest rates in approximately the 8%–10% range can be available in the current market.
The borrower must also consider the complete cost of financing.
This can include:
- Mortgage interest
- Lender fee
- Mortgage broker fee
- Appraisal costs
- Lender’s legal costs
- Borrower’s legal costs
- Other project-specific expenses
The interest rate alone therefore does not represent the complete cost of borrowing.
All applicable borrowing costs should be clearly disclosed before the borrower commits to the financing.
Private Construction Rates Versus Bank Financing
Private financing is frequently described as expensive.
That description requires context.
A conventional five-year residential mortgage and a private construction mortgage are financing two very different risks.
The proper comparison is not:
Private construction mortgage versus discounted five-year conventional mortgage.
The more appropriate comparison is:
Private construction financing versus the conventional construction financing actually available for that specific project.
Private construction rates around 8%–10% can also fall within the same general territory as posted bank open-mortgage rates.
Private financing has additional lender and broker fees, so the total borrowing cost will normally be higher.
However, the private lender can be accepting a substantially different level of construction and security risk.
The most important question is therefore not simply:
“Which lender has the lowest rate?”
It is:
“Which lender will actually finance this project on terms that allow it to be completed?”
Bank Construction Mortgage vs. Private Construction Mortgage
| Feature | Bank Construction Financing | Private Construction Financing |
| Borrower qualification | Strict conventional underwriting | More flexible |
| Security review | Extensive | Extensive |
| Construction budget | Required | Required |
| Appraisal | Required | Required |
| Progress draws | Common | Structure varies |
| Inspections | Common | Depends on structure |
| Builder/project requirements | Bank-specific | Lender-specific |
| Partially completed project | Difficult | Can be considered |
| Interest rate | Application-specific | Risk-based |
| Lender fee | Product-specific | Common |
| Broker fee | Depends on transaction | Common |
| Speed/flexibility | More structured | Greater flexibility |
| Primary focus | Borrower + project + security | Security + equity + exit strategy |
A Hybrid Bank and Private Construction Strategy
Construction financing does not always have to be entirely conventional or entirely private.
Sometimes the most effective solution combines the two.
For example, a homeowner might have substantial equity in an existing principal residence.
Instead of financing the entire construction project privately, the borrower can first obtain the maximum appropriate conventional financing against the completed residence.
That provides lower-cost capital for the initial stages of construction.
Private construction financing can then provide the additional capital required to complete the project once sufficient value has been created in the new property.
This strategy can reduce the amount of higher-cost private capital required.
It also illustrates an important principle:
Good construction financing is about structuring capital, not simply finding a mortgage rate.
The Exit Strategy Matters
Private construction financing is normally intended to solve a temporary financing problem.
Before advancing funds, the lender wants to understand how it will ultimately be repaid.
The expected exit might be:
- Completion followed by conventional refinancing
- Sale of the completed property
- Refinancing another property
- Another clearly established source of repayment
The stronger and more realistic the exit strategy, the stronger the financing application.
A plan based simply on hoping that another lender will refinance the mortgage later is not an adequate strategy.
Planning a New Home Build in Peterborough or the Kawarthas
Construction financing should be part of the planning process from the beginning.
Before breaking ground, determine:
- How much equity is available.
- How much cash will be required before the first draw.
- Whether the proposed builder and project meet lender requirements.
- What the land is worth.
- What the completed home is expected to be worth.
- How much the project will cost.
- How cost overruns will be funded.
- What financing will be available during construction.
- How the construction mortgage will ultimately be repaid or converted.
- What happens financially if construction takes longer or costs more than anticipated.
Peterborough and the Kawarthas also contain rural properties, acreage, waterfront properties and custom homes that can require additional underwriting considerations.
Those issues should be identified before construction begins.
Frequently Asked Questions About Construction Mortgages in Ontario
Can I get a mortgage to build my own house in Ontario?
Yes. Construction mortgage programs are available in Ontario. Approval depends upon the borrower, property, construction plan, budget and the lender’s construction requirements.
Does a construction mortgage give me all the money upfront?
Bank construction mortgages commonly use progress draws. Funds are released as predetermined construction stages are completed and verified.
Private construction financing can use different advance structures depending upon the lender and project.
Do I need good credit for a construction mortgage?
Credit is important for conventional bank construction financing, but good credit alone does not qualify the project. The lender must also approve the construction and security.
Can I obtain construction financing after I have already started building?
It can be considerably more difficult.
A conventional lender must determine why financing was not arranged initially and assess the partially completed property, remaining construction costs and completion risk.
Private construction lenders can consider some projects already underway.
What happens if construction costs exceed my budget?
The borrower remains responsible for ensuring sufficient funds are available to complete the project. Cost overruns can create serious financing problems if additional capital has not been planned.
Are private construction mortgages expensive?
Private construction financing costs more than ordinary conventional closed mortgage financing because the lender accepts additional risk.
For strong first-position construction projects, current private construction interest rates can be approximately 8%–10%, with lender, broker, appraisal and legal costs additional.
Why does the lender care who builds the house?
The lender relies on the completed property as its ultimate security. It therefore needs confidence that the construction can be completed properly, within budget and in accordance with applicable requirements.
What is the biggest mistake people make with construction financing?
Starting construction before arranging enough financing to finish the project.
Once a project is partially complete and available capital is exhausted, financing options can narrow significantly.
The Bottom Line
Construction lending is fundamentally different from financing a completed home.
The lender is not simply underwriting the borrower.
It underwrites the borrower, the project, the construction process, and the future security.
That is why a borrower with excellent income and credit can still struggle to obtain a construction mortgage.
Banks offer excellent construction-financing programs for projects that fit their requirements. Private construction lenders provide an important alternative when a viable project falls outside conventional lending parameters.
Neither solution should begin with the interest rate.
It should begin with the financing strategy.
The best time to arrange construction financing is before construction starts—not when the project runs out of money.
Need Help Financing a New Home Build?
If you are planning a new home construction project in Peterborough, the Kawarthas or Central Ontario, arrange the financing strategy before construction begins.
If construction is already underway and additional financing is required, the project should be reviewed based on its current value, cost to complete, available equity and exit strategy.
Your Mortgage Advocate,
Mike Cara
Mortgage Broker
