Why construction lending is different
A standard mortgage is secured against a substantially completed property.
A construction lender advances against a project that may be:
Incomplete
Exposed to weather
Over budget
Delayed
Uninhabitable
Difficult to sell
Dependent on permits and inspections
Worth less than the money already invested
The lender is underwriting both the borrower and the process required to create the completed collateral.
Main financing categories
| Financing type | Intended use | Typical advance method |
|---|---|---|
| Lot financing | Purchase or refinance of vacant building land | Single advance, often at conservative LTV |
| Construction mortgage | New home being built on borrower-owned or acquired land | Progress draws |
| Owner-build or self-build loan | Borrower acts as builder or construction manager | Progress draws with enhanced oversight |
| Contract-build loan | Arm’s-length builder constructs the home | Draws based on contract and inspections |
| Major renovation financing | Structural or extensive renovation | Draws or short-term construction facility |
| Purchase-plus-improvements | Purchase of a completed home requiring defined renovations | Initial purchase advance plus improvement holdback |
| Refinance-plus-improvements | Existing owner finances planned improvements | Initial advance and later release, product-specific |
| Private construction mortgage | Project outside institutional policy or timeline | Customized draws or controlled advances |
| Completion bridge | Short-term funds needed to reach institutional completion requirements | Limited-term construction or private loan |
Institutional insured construction and improvement financing
CMHC’s current Improvement program permits owner-built, contract-built and qualifying builder pre-sold arrangements. For new construction, CMHC requires approval before construction begins or at an early stage, lender control of the building during construction, and use of insured funds and land equity toward completion. It does not permit loan advances on vacant land under that insured new-construction structure.
CMHC distinguishes:
Single advances where improvement costs are no more than 10% of as-improved value
Progress advances for new construction or improvements exceeding 10% of as-improved value
Its Full Service option currently validates up to four consecutive advances, while Basic Service permits the lender to validate advances under the insurer’s framework.
Classification: CMHC mortgage-insurer policy.
Current status: Accessed July 23, 2026.
Material qualification: A lender must participate in the program and may impose additional limits, builder requirements and draw controls.
As a separate named-lender example, TD’s July 2026 Purchase/Refinance Plus Improvements policy is limited to defined non-structural work, uses two advances, and requires borrowers to pay renovation expenses before the improvement holdback is released. That is a TD product rule—not a general construction-mortgage rule.
Construction budget
A construction budget should include:
Land acquisition or existing land value
Design and architectural fees
Engineering
Permits
Development charges
Site preparation
Excavation
Foundation
Framing
Roofing
Windows and exterior
Mechanical systems
Electrical
Plumbing
Insulation and drywall
Interior finishes
Fixtures
Landscaping
Driveway
Utility connections
Interest during construction
Inspections
Insurance
Taxes
Professional fees
Contingency
A budget that includes only contractor quotations but excludes financing and soft costs is incomplete.
Contingency
A contingency is funding reserved for unexpected costs.
The appropriate percentage depends on:
Project stage
Fixed-price contracts
Renovation uncertainty
Soil and environmental conditions
Age of existing structure
Material-price volatility
Owner-builder experience
Permit risk
A contingency is not extra money available for upgrades. It protects completion.
Draws and inspections
Construction funds are normally advanced in stages after an inspector confirms progress and value.
An illustrative draw sequence may be:
| Stage | Work typically reviewed | Lender concern |
|---|---|---|
| Land and borrower equity | Land ownership and initial borrower investment | Borrower equity must enter before or alongside lender funds |
| Foundation | Excavation, footings, foundation | Early work has limited resale value if project stops |
| Framing and weather-tight | Structure, roof, windows and exterior enclosure | Building must be protected from weather |
| Mechanical and drywall | Plumbing, electrical, HVAC, insulation and drywall | Hidden work and permits must be supportable |
| Interior completion | Kitchens, bathrooms, flooring and fixtures | Remaining costs must be sufficient |
| Final completion | Occupancy, exterior, deficiencies and final inspection | Property must meet takeout-lender and occupancy standards |
HopeWell’s internal agent training uses a similar multi-draw teaching model but treats draw timing as lender- and project-specific rather than a universal five-stage rule.
How a construction draw is determined
A lender may limit a draw by the lowest of:
Approved cost-to-date
Inspector-certified progress
Loan commitment
LTV against current value
LTV against as-completed value
Remaining amount required to finish
Contractual advance schedule
Simplified formula
Available draw = Lesser of approved cost-to-date or lender-supported value − Prior advances − Required lender holdbacks
This is a conceptual formula. Actual draw calculations are lender-specific.
Statutory holdback versus lender holdback
Ontario’s Construction Act generally requires a payer under a construction contract or subcontract to retain a 10% statutory holdback on supplied services or materials until applicable lien claims have expired or been addressed.
A mortgage lender may separately retain funds because:
Work is incomplete
Deficiencies remain
A final occupancy document is outstanding
The lender must preserve enough money to finish
A statutory holdback has not been released
Liens have been registered
The inspector’s value does not support the requested advance
A lender holdback and the statutory Construction Act holdback are not necessarily the same amount or legal obligation.
Owners and builders require Ontario construction-law advice concerning:
Lien periods
Holdback release
Contractor payments
Substantial performance
Trust obligations
Registered liens
Worked construction sources-and-uses example
Assumptions
Land value owned by borrower: $300,000
Existing land mortgage: $0
Hard and soft construction budget: $650,000
Contingency: 10% of construction budget
As-completed appraised value: $1,200,000
Construction loan commitment: $700,000
Interest rate: 10%
Interest charged only on funds advanced
No lender fees included
Figures are illustrative
Variables
L = Land value
B = Base construction budget
C = Contingency
TPC = Total project cost
CL = Construction loan
BE = Required borrower equity
LTV = Loan-to-value at completion
Contingency
C = Construction budget × 10%
C = $650,000 × 10%
C = $65,000
Total project cost
TPC = Land value + Construction budget + Contingency
TPC = $300,000 + $650,000 + $65,000
TPC = $1,015,000
Required borrower equity
BE = Total project cost − Construction loan
BE = $1,015,000 − $700,000
BE = $315,000
The borrower already has $300,000 of land equity and would need at least another $15,000, before considering financing costs, lender-required reserves or overruns.
Completed LTV
LTV = Construction loan ÷ As-completed value × 100
LTV = $700,000 ÷ $1,200,000 × 100
LTV = 58.33%
Interest on drawn amount
After an early draw of $150,000:
Monthly simple interest = $150,000 × 10% ÷ 12
Monthly simple interest = $1,250
After total advances reach $500,000:
Monthly simple interest = $500,000 × 10% ÷ 12
Monthly simple interest = $4,166.67
Result
The completed LTV appears conservative, but the project still requires:
Adequate borrower equity
Enough money to reach each draw
Interest during construction
Contingency
Inspection and legal compliance
Funds to complete if the final draw is delayed
Interpretation
A construction mortgage can fail despite a strong as-completed LTV if the borrower cannot finance the gap between contractor invoices and draw releases.
Owner-build and self-build risk
A lender may require evidence of:
Construction experience
Detailed scope of work
Trade quotations
Permits
Drawings
Fixed-price contracts where available
Builder’s-risk insurance
WSIB or contractor compliance where applicable
Inspector access
Construction schedule
Cost-to-complete analysis
Backup contractor plan
An owner-builder may save a contractor margin but assumes project-management risk.
The lender may be more conservative because:
Costs are less predictable
Work may be performed by related parties
Builder warranties may not apply in the same way
The borrower may lack experience
Completion can depend on the borrower’s health or employment
Personal credit cards may be used to fund gaps
Renovation financing
A renovation can be financed through:
Savings
HELOC
Refinance
Purchase-plus-improvements program
Renovation mortgage
Construction draws
Private construction financing
Contractor financing or unsecured credit
The correct structure depends on:
Structural versus cosmetic work
Cost relative to property value
Whether the borrower can pay contractors before reimbursement
Permit requirements
Current property condition
Existing mortgage penalty
Expected as-completed value
A kitchen renovation does not require the same financing structure as removing load-bearing walls or adding a floor.
What the underwriter is thinking
The construction underwriter is asking:
Who is responsible for completing the project?
Is the budget complete?
What has already been spent?
Are permits and drawings available?
Is the property insured for construction?
How much borrower equity is already invested?
What is the current value?
What is the as-completed value?
How much will remain to finish after each draw?
What happens after a 10% or 20% cost overrun?
Can the borrower carry rent or another mortgage during construction?
Which lender will provide the final takeout mortgage?
HopeWell case studies
Cambridge self-renovation on a free-and-clear home
A Cambridge homeowner was self-renovating a free-and-clear property.
The lack of an existing mortgage gave the project a strong equity position, but lenders remained concerned about self-managed construction and completion risk.
A private construction loan funded the remaining work. The intended exit was a conventional refinance once the property was complete and suitable for ordinary residential underwriting.
The underwriting lesson: Strong land or property equity improves the lender’s security but does not replace a complete budget, construction plan and takeout strategy.
Canadian Armed Forces veteran: construction loan followed by bank refinance
A retired CAF veteran was self-building a residence. The property was approximately 80% complete, but the intended institutional lender required a much higher level of completion—approximately 97% in that particular file.
Credit-card borrowing used during construction had also impaired the borrower’s credit.
The file was structured in two stages:
Short-term private construction funds to complete the property
Major-bank refinance after completion, supported by stable pension income, low LTV and a credit exception
The bank refinance was expected to reduce monthly liabilities by approximately $3,500.
The underwriting lesson: A private construction loan is most defensible where it funds the exact work required to satisfy an already analyzed institutional takeout.
Brampton place of worship
A Brampton place of worship required a multi-million-dollar construction loan.
The property was specialized institutional collateral, creating concerns about:
Resale market
Enforcement sensitivity
Project completion
Construction size
Lender appetite
Private lenders comfortable with specialized-use construction were approached rather than treating the file as a standard residential or commercial construction mortgage.
The underwriting lesson: Specialized collateral requires a lender that understands both construction risk and the property’s limited alternative use.
Construction decision tree
Is the property currently complete and habitable?
Yes → Consider ordinary refinance, HELOC or improvements product.
No → Continue.
↓
Is the work cosmetic and within an institutional improvement-program limit?
Yes → Consider purchase/refinance-plus-improvements.
No → Continue.
↓
Are permits, budget, drawings, insurance and builder arrangements complete?
No → File is not ready for construction underwriting.
Yes → Continue.
↓
Does an institutional construction lender accept the borrower, project and location?
Yes → Structure progress advances.
No → Continue.
↓
Does sufficient equity support private construction financing, and is there a documented completion/takeout exit?
No → Project may require more equity, redesign or delay.
Yes → Compare private construction terms and draw controls.
Common reasons files fail
Budget excludes soft costs and interest
No realistic contingency
Borrower assumes the lender advances before work is completed
Draw schedule does not match contractor payment dates
Permits are missing
Builder’s-risk insurance is unavailable
Owner-builder experience is insufficient
Construction liens are not addressed
Property value assumes every dollar of cost creates equal value
As-completed appraisal is unsupported
Borrower uses high-limit credit cards to cover every draw gap
Final takeout lender has not been analyzed
Work is too incomplete for the expected refinance
Project timeline is unrealistic
Leasehold, rural or specialized property issues are discovered late
If You Remember Only Three Things
A construction lender finances progress—not merely the final appraisal.
The budget must include contingency, interest, inspections, soft costs and cash required between draws.
Short-term private construction financing is suitable only where completion creates a defined institutional refinance, sale or other credible repayment path.