Existing mortgage
The current balance, limits and lender security position affect available equity and whether refinancing is needed before demolition.
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Knockdown rebuild loans · Victoria
Finance the transition from existing home to completed rebuild
A knockdown rebuild changes the lender’s security before creating a new home. The finance plan must account for the current mortgage, demolition, construction contract, completed valuation and where you will live during the works.
Existing debt and rebuild finance mapped together
The short answer
Can I get a construction loan for a knockdown rebuild?
Potentially. The lender assesses the existing property and debt, the effect of demolition, the proposed building contract and the as-if-complete valuation. Demolition usually cannot begin until the lender has approved the arrangement and any required conditions are satisfied.
Plan before works begin
The security value changes before the new value exists
Once the existing dwelling is removed, the lender temporarily holds vacant or partly improved land as security. This makes sequencing, valuation and approval conditions especially important.
- Do not arrange demolition before the secured lender confirms its requirements
- Include demolition, permits, site works, rent and storage in the complete budget
- Test whether existing equity covers the required contribution and contingency
- Allow for delays between vacating, demolition, construction and occupancy
Demolition approval
The lender may require formal consent, permits, contracts, insurance and evidence that the complete rebuild is funded before demolition.
Temporary living costs
Rent, storage and moving expenses can overlap with loan interest for longer than expected and should be included in serviceability and cash-flow planning.
Completed valuation
The proposed home is valued using its plans, specification, site and market evidence. High-end upgrades do not always add equal market value.
Compare the pathway
Stay with the current lender or refinance the rebuild?
The existing lender knows the security, but another lender may provide a better construction policy. Costs and demolition timing need to be compared carefully.
Decision point
Existing lender
Refinance before rebuild
Security
Already holds the property as security.
New lender must value and settle before construction steps proceed.
Process
May add or restructure construction funding.
Requires refinance plus construction approval and conditions.
Costs
May avoid some switching costs.
May involve discharge, application and valuation costs.
Choice
Limited to one lender’s policy and pricing.
Allows comparison but must produce a workable net benefit.
How it works
From costed plans to the final drawdown.
- 01
Map existing debt, equity, demolition, full build cost, temporary accommodation and contingency.
- 02
Compare lender policy and secure approval before changing or demolishing the lender’s security.
- 03
Coordinate demolition conditions, construction drawdowns and final completion evidence.
Common questions
Clear construction-loan answers for Victorians
Can I demolish a mortgaged home?
Not without addressing the lender’s security requirements. Contact the lender and obtain approval before demolition or material works.
Can demolition costs be included in the construction loan?
Some project costs may be considered, but lender treatment varies and payment timing may require cash. Confirm inclusions before signing contracts.
How is a knockdown rebuild valued?
The lender may assess current land value and an as-if-complete value based on plans, specifications, contract and comparable completed properties.
Can I keep my current home loan rate?
Possibly if the existing lender can restructure or extend the facility, but the construction portion may have different pricing and terms. Compare the complete proposal.
Will the lender include rent during the build?
Rent and other ongoing living costs usually form part of the serviceability assessment. The expected construction period and a delay buffer should be realistic.
Reviewed 14 September 2026 by Chris Berry. General information only and not financial, legal, building, engineering or tax advice. Lending criteria, valuations, interest treatment, contracts, progress payments and acceptable builders vary. Approval, cost and completion dates are not guaranteed.
Official information: Consumer Affairs Victoria building contracts · Consumer Affairs Victoria progress payments · Consumer Affairs Victoria plans and permits
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