What Not to Do When Financing a Multi-Unit Site

Treating Your Development Site Loan Like a Standard Home Loan

Development finance for multi-unit sites operates under completely different approval criteria and drawdown structures than residential mortgages. Lenders assess the viability of the project itself, not just your ability to service a loan, which means your borrowing capacity depends on feasibility studies, development applications, and projected end values rather than salary multiples.

Consider a self-employed builder purchasing a 1,200-square-metre site zoned for four townhouses. The lender will want detailed costings from a quantity surveyor, council approval for the subdivision, pre-sales or a clear exit strategy, and evidence that your business income can cover interest during construction. If you approach this as a land purchase with a vague plan to build later, most lenders will decline or offer far less favourable terms. The construction component needs to be locked in from the outset, with a fixed price building contract and a progress payment schedule that aligns with the lender's drawdown process.

How Lenders Assess Self-Employed Income for Construction Finance

Most lenders require two years of financials for self-employed applicants, but construction loans add another layer of scrutiny because the project itself becomes part of the security assessment. Your accountant's letter, business activity statements, and tax returns need to demonstrate consistent income, but the lender will also assess whether your cash flow can handle interest-only repayments on the full loan amount once all funds are drawn down.

In a scenario where a self-employed consultant is purchasing a site for dual occupancy, the lender might assess their income at 80% of declared earnings after adding back depreciation. If that income is $120,000 after adjustments, serviceability calculations will include not just the land loan but the projected peak debt once both dwellings are under construction. That might mean a total facility of $900,000, with interest accruing progressively as each stage is funded. The mistake many buyers make is assuming approval for the land portion guarantees approval for the construction drawdowns. It does not. The construction funding is conditional on milestones being met and the project staying on budget.

Fixed Price Contracts vs Cost Plus Structures

Lenders prefer fixed price building contracts because they limit cost blowouts and provide certainty around the total loan amount. A cost plus contract, where you pay the builder's actual costs plus a margin, introduces variable risk that most mainstream lenders will not accept for self-employed borrowers without significant cash reserves or cross-collateralised security.

If you are planning to act as an owner builder or engage subcontractors directly, expect even tighter lending criteria. Some lenders will not offer construction finance to owner builders at all. Others will require a 30% deposit, detailed project management experience, and a line-by-line breakdown of how funds will be allocated across trades. For a multi-unit site, this becomes exponentially more complex because you are coordinating multiple builds simultaneously, each with their own progress payment schedule and council inspections.

Ignoring the Timing Between Council Approval and Loan Settlement

Development applications can take six to twelve months depending on the council and the complexity of the subdivision. If you purchase the land before securing council approval, you will be paying interest on the full site value while waiting for permits, which erodes your equity before construction even begins. Some lenders require you to commence building within a set period from the disclosure date, which creates pressure if your development application is delayed or conditions are imposed that require design changes.

In our experience, buyers who coordinate the DA process before settlement avoid this cash flow drain. You can make an offer on the land conditional on obtaining council approval, or structure the contract with a longer settlement period that allows the DA to progress in parallel. This approach also gives you certainty around what can actually be built, which is critical when presenting the project to a lender. A site marketed as having potential for four units might only receive approval for three, which changes the feasibility and the loan amount you can justify.

How the Progressive Drawdown Actually Works

Construction finance is released in stages as the build progresses, not as a lump sum upfront. The typical progress payment schedule includes slab down, frame up, lockup, fixing, and practical completion, with each stage requiring a progress inspection by the lender's valuer before funds are released. You pay a progressive drawing fee each time, usually between $200 and $400 per drawdown, and interest is only charged on the amount drawn down so far.

For a multi-unit site, this means managing four separate construction schedules if all dwellings are being built concurrently, or sequencing the builds and drawdowns if you are staging the development. The latter reduces your peak debt but extends the timeline, which increases total interest costs. A self-employed buyer needs enough working capital to cover the gap between paying subcontractors and receiving the next drawdown, because most trades will not wait for the lender's inspection process to complete before expecting payment.

The Role of Pre-Sales in Securing Construction Funding

Some lenders will only approve construction finance for multi-unit developments if you have pre-sold a percentage of the finished dwellings, typically 50% to 70% depending on the number of units. This de-risks the project from the lender's perspective because it confirms end demand and provides a clear exit strategy. If you plan to retain all units as investment properties, you will need to demonstrate that your income can service the debt on the completed development, which is a much higher hurdle for self-employed applicants.

Pre-sales also affect your borrowing capacity because signed contracts with deposits held in trust count as committed buyers, which strengthens the feasibility study. Without them, the lender will value the site based on comparable land sales and apply a discount to your projected end values, which reduces the loan-to-value ratio they are willing to offer. For a self-employed buyer without substantial equity in other properties, this can be the difference between approval and decline.

What Happens When Construction Costs Exceed the Approved Loan Amount

Cost overruns are common in multi-unit developments, particularly when site conditions reveal unexpected issues or material prices increase mid-build. If your contracted build cost is $800,000 but the actual cost reaches $900,000, the lender will not automatically increase your facility. You will need to cover the shortfall from your own funds or seek a variation to the loan, which requires a revaluation and reassessment of serviceability.

This is where a buffer built into your initial feasibility becomes critical. Experienced developers include a 10% to 15% contingency in their costings and borrow against that full amount from the outset, even if they do not expect to use it. For self-employed buyers, lenders may cap the loan at a lower LVR to force you to hold some skin in the game, so your own capital needs to be genuinely accessible, not tied up in other projects or illiquid assets.

Structuring the Loan to Convert After Completion

Most construction facilities are designed to convert to a standard investment loan or be refinanced once the development is complete. If you are retaining the units, you will want to roll the construction debt into interest-only investment loans with offset accounts and rental income reducing your serviceability load. If you are selling, the construction loan needs to allow for discharge of individual titles as each unit settles, rather than requiring full repayment before any release.

Some lenders will not allow partial discharges on multi-unit sites, which means you cannot sell unit one and use the proceeds to reduce debt while units two and three are still under construction. This locks up your equity until the entire project is finished. Clarifying these terms during the application stage, not at settlement, prevents you from being trapped in a structure that does not suit your exit strategy. A mortgage broker familiar with development finance can identify which lenders offer the flexibility you need based on whether you are building to hold or building to sell.

Call one of our team or book an appointment at a time that works for you. We will walk through your project costings, income structure, and council timeline to match you with construction funding that aligns with how your development will actually unfold, not just how it looks on paper.

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