CONSTRUCTION & RENOVATION FINANCE
Fund the build without letting the loan become the project risk.
Construction lending needs the contract, valuation, progress payments, contingency and borrower cash flow to work together. Compare the loan structure before the slab, frame and variation invoices start arriving.
Progress-payment planningContract and valuation reviewPolicy-aware lender matchContingency before approval
General information only. Building contracts, cost estimates and calculator outputs require lender, legal and professional confirmation.
CHOOSE THE RIGHT LANE
Not every renovation needs a construction loan.
The correct facility depends on the scale of works, security position, payment schedule, builder arrangement and whether the lender needs to control progress draws.
Standard construction loan
Used for a new dwelling or substantial build with staged progress payments and an on-completion valuation.
Loan increase or renovation split
May suit smaller, non-structural works where funds can be advanced without a controlled construction process.
Refinance and renovate
A new lender can sometimes fund the existing debt plus a documented renovation amount when the structure and valuation support it.
Knock down and rebuild
Requires careful treatment of the existing security, demolition, temporary accommodation, build contract and completed value.
House-and-land
Land and build may settle separately or together; contract timing, deposit and valuation should be mapped before signing.
Owner builder
Lender choice is materially narrower and additional experience, equity, quotes, permits, quantity-surveyor and contingency requirements may apply.
PROJECT SHAPE CHECK
Loads when you calculateEstimate total debt, completed LVR and build-period interest.
This is a broad planning tool. It uses a current lower-market construction benchmark where an eligible daily-data scenario can be formed.
Enter the land, debt, build cost, cash and completed value to see the broad funding position.
The build-interest estimate assumes progressive average utilisation rather than the exact lender draw schedule. It excludes rent, living costs, capitalised interest rules, lender-specific contingency, quantity-surveyor fees, variations, government charges and tax. A lender valuation and full budget are required.
CURRENT MATCHING RATES
Loads with the calculationConstruction products matching the project entered.
The table uses the estimated debt, completed LVR and principal-and-interest construction scenario above.
| Lender | Product | Interest rate | Comparison rate | Maximum LVR |
|---|
PROGRESS PAYMENTS
The lender releases the build loan in controlled stages.
The builder’s schedule and the lender’s approved stages need to align. The lender generally checks each claim before releasing funds.
Deposit or commencement
The borrower normally contributes required funds first and the lender confirms conditions before the build facility is available.
Base or slab
Site preparation, foundations and slab are inspected before the relevant draw is released.
Frame
The structural frame stage is checked against the contract and progress claim.
Lock-up
External walls, roof, windows and doors normally create the lock-up milestone.
Fixing
Internal fixtures, plaster, cabinetry and services move the project toward completion.
Completion
Final inspection, occupancy documents, insurance and outstanding conditions are addressed before the last draw.
CONTRACT & BUDGET
“Fixed price” does not mean every project cost is fixed.
The lender needs a clear contract price, plans, specifications, progress schedule and evidence that the borrower can cover costs outside the funded contract. Site works, demolition, upgrades, landscaping, driveways, window coverings, professional fees and provisional sums are common sources of funding gaps.
- Builder and contract names match the borrowers and land
- Plans, specifications and inclusions are complete
- Site costs and provisional sums are understood
- Permits and required insurance are available
- Variations require approval and available funds
- A genuine contingency remains after settlement
Independent contract advice matters
A broker reviews lender requirements, not the legal fairness or build quality of the contract. Use an appropriate solicitor/conveyancer and building professional before committing.
LENDER POLICY
Construction policy is materially different between lenders.
The cheapest standard variable rate may not belong to the lender that handles the proposed builder, contract, property and draw process well.
Contract type
Many lenders prefer a fixed-price building contract with a registered builder; cost-plus and owner-builder arrangements are more restricted.
Completed valuation
The lender compares total project cost with an on-completion valuation and may use the lower figure for LVR.
Contingency
Some lenders require a minimum borrower contingency or evidence that variations and unfunded items can be paid.
Progress schedule
The contract stages must be acceptable and the lender may require inspections or quantity-surveyor reporting.
Existing land and debt
Equity, current mortgages, land settlement and whether another lender holds the land can change the structure.
Income during construction
Rent, current mortgage payments, capitalised interest and future repayments must remain serviceable through delays.
VALUATION & FUNDING GAP
Completed value can be lower than the project cost.
Personal upgrades do not always add dollar-for-dollar value. A valuation shortfall can increase the required cash contribution before construction starts.
As-is value
The current land or property is valued before the build or renovation.
On-completion value
The valuer assesses the proposed completed property from plans, specifications and comparable evidence.
Cost to complete
The lender checks whether approved debt plus borrower funds cover the remaining contract and associated costs.
Lower-of logic
LVR may be based on the lender’s accepted value rather than what the project costs or what an online estimate suggests.
CASH FLOW DURING THE BUILD
Plan for overlap, delays and rising utilisation.
Interest is usually charged on the amount drawn, but the balance and monthly cost increase as progress payments are made.
Rent or temporary housing
Allow for living costs until practical completion, including delays beyond the contract date.
Existing mortgage
A knock-down/rebuild or land-and-build can leave existing debt payable while construction interest rises.
Capitalised interest
Some facilities may allow interest to be added to the loan within limits; this increases peak debt and is not automatic.
Rate and time buffer
Test a longer build and a higher rate rather than relying on the most optimistic schedule.
Variation cash
Do not assume the lender will fund every upgrade or contract change.
Final costs
Completion, landscaping, occupation, connections, moving and defects can require cash after the final draw.
OWNER-BUILDER & MAJOR RENOVATION
Higher control for the borrower usually means higher evidence for the lender.
Owner-builder and major structural renovation applications can require materially more equity, experience, permits, cost verification and lender oversight.
Owner-builder pathway
Expect narrower lender choice and possible requirements for detailed quotes, licences/permits, experience, quantity-surveyor reports, larger contingency and lower LVR.
Structural renovation pathway
Where the works alter the structure or are paid in stages, a controlled construction facility may be required even though the property already exists.
Do not start works before lender confirmation
Beginning demolition or construction before formal approval can affect security value, valuation and lender willingness to proceed.
CONSTRUCTION PROCESS
Prepare the project and finance together.
Define the project
Land, build, renovation, demolition, builder, timeline and total costs.
Confirm budget and equity
Existing debt, deposit/cash, contingency, rent and expected completed value.
Match lender policy
Contract, builder, LVR, servicing, valuation, draw process and owner-builder rules.
Obtain formal approval
Submit documents, valuation, permits, insurance, contract and required contribution evidence.
Manage draws to completion
Coordinate progress claims, inspections, variations, final documents and post-build loan setup.
DOCUMENTS
What a construction lender commonly needs.
Requirements differ by project and lender, but incomplete project documents are a common source of delay.
Borrower documents
Identity, income, expenses, liabilities, savings/equity and evidence of the required contribution.
Land and security
Contract/title, current loan details, rates notice and valuation access.
Builder and contract
Signed building contract, builder details, licence/registration, progress schedule and insurance.
Plans and specifications
Approved plans, detailed inclusions, engineering and relevant reports.
Permits and approvals
Planning/building permits, demolition approval and other authority requirements where applicable.
Cost evidence
Site costs, quotes outside contract, contingency, professional fees, variations and quantity-surveyor information where requested.
RELATED TOOLS & GUIDES
Plan the loan around the whole project.
Use the supporting resources to test repayments, compare current products and understand the wider home-loan process.
Current Home-Loan Rates
Review current construction and standard home-loan products in the daily market feed.
Explore →Mortgage Repayment Calculator
Stress-test the post-build repayment across different rates and terms.
Explore →Home Loan Guide
Review approval, valuation, structure and settlement fundamentals.
Explore →First-Home Buyer Broker
Combine first-home deposit/scheme planning with land and construction policy.
Explore →Bridging Loans
Consider buy-before-sell funding where an existing home is being replaced.
Explore →Contact Rate Challenge
Discuss contract timing and lender requirements before signing.
Explore →
YOUR BROKER
Clear lender policy, clean execution and a plan that survives the real application.
David Warburton combines commercial-banking experience with mortgage broking and a broad lender panel. The aim is not to force a lender change or maximise debt. It is to explain the trade-offs, match the file to workable policy and keep the transaction moving from the first review through to settlement.
CONSTRUCTION FAQS
Questions to resolve before the build starts.
How is a construction loan different from a normal home loan?
The lender generally controls the release of funds in stages, requires project documents and values the completed property before or during approval.
Do I pay interest on the full approved amount immediately?
Usually interest is charged on the amount drawn, so it increases as progress payments are made. Exact repayment and capitalisation arrangements depend on the lender and facility.
What is an on-completion valuation?
A valuer estimates the finished property value using the land, plans, specifications and comparable evidence. It may be lower than total project cost.
Can the lender fund variations?
Not automatically. Variations can require borrower cash, a re-assessment or a loan increase and may delay progress payments.
How much contingency should I keep?
There is no universal percentage. Site uncertainty, contract exclusions, provisional sums, landscaping, professional fees and borrower experience all affect the appropriate buffer.
Can I use equity in land I already own?
Potentially. The accepted land value, existing debt, total project cost, completed valuation, LVR and serviceability determine how much equity is usable.
Can first-home buyer schemes apply to construction?
Some current programs may support eligible new builds or house-and-land transactions, but applicant, property, timing, price and participating-lender rules must be checked on the live scheme page.
Can I be my own builder?
Some lenders consider owner-builder projects, but options are much narrower and additional equity, permits, experience, reports and cost controls may be required.
What happens if construction is delayed?
Rent, existing mortgage costs and construction interest may continue for longer. Approval conditions, builder insurance and facility expiry should be reviewed early.
Should I sign the building contract before finance approval?
Obtain legal advice on contract timing and finance conditions. At minimum, have the finance structure, likely lender policy, budget and valuation risk reviewed before making an unconditional commitment.
Build the finance plan before the project starts.
Bring the land, contract, costs, cash contribution and completed-value estimate together so the lender pathway is realistic before progress payments begin.