Buying a multi-unit development site requires a different finance structure than a standard home loan.
You'll typically need a land and construction package that covers both the site purchase and the build phase, with funds released progressively as your project reaches specific milestones. Understanding how construction draw schedules work and what lenders require before committing can save you from holding costs that drain the project before you've laid a single slab.
What Lenders Look for When Financing Multi-unit Sites
Lenders assess multi-unit development finance based on the end value of all dwellings combined, your experience level, and the quality of your fixed price building contract.
Most lenders won't proceed without council approval in place. Your development application needs to be approved before they'll formally assess the construction loan application. They'll also want detailed council plans showing the layout, specifications, and compliance with local zoning. A registered builder must be attached to the project with a fixed price contract that outlines the full scope and a progress payment schedule.
Consider someone purchasing a 900-square-metre site in Caringbah zoned for three townhouses. The land costs $1.4 million, and construction is quoted at $1.2 million across all three dwellings. The lender values the completed project at $3.2 million based on comparable sales in the area. With a 30% deposit ($780,000), the purchaser borrows $1.82 million. The loan covers the land purchase upfront, then releases construction funding progressively as each stage completes and passes inspection.
How Progressive Drawdowns Work on Multi-unit Builds
Construction finance releases funds in stages aligned with your builder's progress payment schedule, and you only pay interest on the amount drawn down at each stage.
The draw schedule typically has five to seven stages: base stage after slab, frame stage, lock-up stage, fixing stage, and practical completion. Your lender arranges a progress inspection at each stage before releasing the next payment. Most lenders charge a Progressive Drawing Fee for each inspection and drawdown, usually between $300 and $500 per draw.
During construction, you're on interest-only repayment options. This means you're only paying interest on whatever portion of the loan has been drawn down. If your total facility is $1.82 million but only $400,000 has been released for land and base, your interest charges apply to that $400,000. This structure keeps your holding costs lower while the project progresses, compared to borrowing the full amount upfront.
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What to Expect with Construction Loan Interest Rates
Construction loan interest rates sit slightly above standard variable home loan rates because of the additional risk and administration involved in progressive drawdowns.
At the time you apply, lenders typically price construction facilities between 0.20% and 0.50% higher than their advertised variable rate for owner-occupied or investment home loans. Some lenders offer a construction to permanent loan structure where the rate adjusts down once the build completes and you move into standard loan terms. Others keep the same margin throughout.
The interest rate you're charged during construction applies only to funds already drawn. If your project stalls or runs over time, you continue paying interest on whatever's been released, but the unused portion doesn't accrue interest. Most lenders require you to commence building within a set period from the Disclosure Date, often six months. If you miss that window, they may withdraw the approval or require a full reassessment.
Why Fixed Price Contracts Matter More on Development Sites
Lenders won't approve construction funding without a fixed price building contract because cost overruns on multi-unit projects can quickly exceed the approved loan amount.
A cost plus contract, where the builder charges for materials and labour with a margin on top, won't satisfy most lenders. They need certainty that the project can be completed within the approved budget. Your builder's quote should include all works required to reach practical completion, including connections for plumbers and electricians, landscaping, driveways, and final finishes.
In situations where the project runs over budget, you'll need to cover the shortfall from your own funds. Lenders base the loan amount on the lesser of the contracted build cost or the valuation, so if your builder quotes $1.2 million but the valuer assesses replacement cost at $1.1 million, the lender funds based on $1.1 million. If actual costs hit $1.3 million, you're responsible for that $200,000 gap.
Owner Builder Finance for Multi-unit Projects
If you're planning to manage the build yourself and pay sub-contractors directly, securing owner builder finance becomes significantly harder on multi-unit developments.
Most mainstream lenders won't touch owner builder projects on sites with more than one dwelling. The administrative burden of verifying invoices, inspecting works completed by different trades, and managing the risk of incomplete or defective work doesn't align with their credit policy. Specialist lenders exist but charge higher rates and require larger deposits, often 40% or more.
You'll also need an owner builder licence in most states if the total project value exceeds a set threshold, typically around $12,000 to $16,000 depending on jurisdiction. Without relevant building experience, insurers won't provide the required indemnity cover, which creates another barrier to approval. For PAYG professionals without a trade background, engaging a registered builder under a fixed price contract remains the clearest path to securing construction finance that doesn't erode your cash flow before the project begins.
Deposit Requirements and Where Your Equity Sits
Most lenders require between 25% and 35% deposit on multi-unit development sites, calculated on the combined land and construction costs.
Your deposit doesn't just cover part of the land purchase. It acts as a buffer for the lender against cost blowouts, market shifts, and project delays. If you're purchasing land for $1.4 million and building for $1.2 million, a 30% deposit means you're contributing $780,000 upfront. That equity typically goes toward the land purchase and deposit to the builder, with the lender covering the rest.
Some purchasers use equity in an existing property to fund the deposit rather than liquidating savings or investments. This works when the existing property has sufficient equity and your income can service both the existing loan and the new construction facility. Lenders assess your borrowing capacity based on the combined debt, so if you're already carrying a mortgage on a family home, the additional construction loan needs to fit within your serviceability limits even while you're making interest-only payments.
Development Application Timing and Loan Approval
You can apply for construction finance before your development application is approved, but formal loan approval is conditional on receiving council approval.
Most lenders issue conditional approval based on your financials, the site valuation, and the builder's quote. That approval remains subject to you providing evidence of council approval within a set timeframe, often three to six months. If your DA is rejected or significantly amended, the lender reassesses based on the revised plans, which can change the valuation and loan amount.
If you're purchasing the site with finance, your contract typically includes a DA approval clause that lets you exit if council rejects the application. This protects you from being locked into a land purchase that can't deliver the intended development. Once council approval is granted and all other conditions are met, the lender moves to formal approval and you can settle on the land.
Call one of our team or book an appointment at a time that works for you. We'll connect you with lenders who understand multi-unit construction finance and can structure a facility that aligns with your project timeline and cash flow.
Frequently Asked Questions
Can I get construction finance without council approval on a multi-unit site?
You can apply for conditional approval, but lenders won't proceed to formal approval or settlement without evidence of council approval for your development application. Most lenders require approved plans showing full compliance with local zoning before releasing any construction funds.
How much deposit do I need for a multi-unit development site?
Most lenders require between 25% and 35% deposit calculated on the combined land and construction costs. On a project costing $2.6 million total, you'd typically need between $650,000 and $910,000 as your contribution.
Do I pay interest on the full loan amount during construction?
No, you only pay interest on the amount drawn down at each stage of construction. If $400,000 has been released for land and base stage, your interest charges apply to that portion, not the full approved facility amount.
Will lenders approve owner builder finance for multi-unit projects?
Most mainstream lenders won't approve owner builder finance on multi-unit developments. Specialist lenders exist but typically require larger deposits of 40% or more and charge higher interest rates.
What happens if construction costs exceed the approved loan amount?
You'll need to cover the shortfall from your own funds. Lenders base the loan amount on the contracted build cost or valuation, whichever is lower, and won't increase the facility mid-project for cost overruns.
