Why Construction Loans for Multi-Unit Sites Work

Why Multi-Unit Development Finance Differs from Standard Construction Loans

Multi-unit development finance works differently because the loan amount, draw schedule, and approval requirements reflect the scale and complexity of building multiple dwellings on one site. A standard construction loan funds one home, typically with a registered builder and a fixed price building contract. Multi-unit projects involve council plans for subdivision or strata, a development application process, and a progressive drawdown that matches the construction stages for multiple units rather than a single residence.

Narellan sits in the Camden Growth Area, which has seen consistent subdivision activity and townhouse projects over the past decade. If you're looking at a site near Camden Valley Way or within the newer estates surrounding Narellan Town Centre, lenders will assess the exit strategy as much as the build itself. They want to know whether you're holding all units as rentals, selling off the plan, or a combination. Your loan structure will depend on that answer.

Consider someone purchasing a 2,000 square metre site zoned for four townhouses. The land costs $1.2 million, and the construction budget sits at $1.4 million across all four units. A lender will typically require a 30% deposit of the total project cost, which includes land and construction. That's $780,000 upfront. The loan amount covers the remaining $1.82 million, but it's drawn progressively as the build advances. During construction, you only pay interest on the amount drawn down, not the full loan amount. Once construction completes, the loan can convert to a standard investment or owner-occupier loan if you're holding the units, or it's repaid from sales proceeds if you're exiting.

What Lenders Assess Before Approving a Multi-Unit Construction Loan

Lenders assess your development application approval, the builder's credentials, your construction budget, and your exit strategy. Council approval must be in place before settlement, and the development application should show subdivision into separate titles or strata. The builder needs to be registered and insured, with a fixed price contract detailing the construction cost for each unit or the entire project. Your exit strategy determines whether the loan converts to permanent finance or is repaid from sales, and lenders will model serviceability based on rental income or presale contracts.

Your construction budget will be scrutinised. Lenders use quantity surveyors to review the cost breakdown, and they want to see that the figures align with comparable projects in the area. If your builder quotes $350,000 per townhouse for a 180 square metre build in Narellan, that's in line with recent mid-range construction costs for that configuration. If the quote comes in at $250,000 per unit, the lender will question whether the budget is realistic or whether you're planning to act as an owner builder to reduce costs. Owner builder finance is available, but it requires a larger deposit and more detailed progress inspection at each drawdown stage.

How the Progressive Drawdown Works Across Multiple Units

The progressive drawdown releases funds at key construction milestones, and the schedule is tied to progress inspections rather than calendar dates. A typical schedule includes a land payment at settlement, a slab or base stage payment once foundations are complete, a frame stage payment when the structure is up, a lockup stage when the roof and external walls are finished, a fixing stage when internal fit-out is underway, and a final payment at practical completion. For multi-unit sites, the drawdown can be structured per unit or across the entire project, depending on how the build is staged.

If you're building four townhouses, and the builder constructs all four simultaneously, the draw schedule will cover each stage across all units at once. If the builder stages the work and completes two units before starting the next two, the draw schedule needs to reflect that sequence. Lenders charge a Progressive Drawing Fee for each inspection and release, usually between $300 and $500 per draw. Over six stages, that's $1,800 to $3,000 in fees across the project.

In situations where you're coordinating multiple sub-contractors rather than using a head contractor, lenders will require detailed invoices and progress reports at each stage. They'll also want to see that plumbers, electricians, and other trades are licensed and that payments align with work completed. This adds administrative load, but it gives you direct control over construction funding and timing.

Interest-Only Repayments and How They Lower Holding Costs During Construction

Interest-only repayment options allow you to pay only the interest on the drawn amount during construction, which keeps monthly costs lower while you're not generating income from the site. Once construction completes, the loan can remain interest-only for a further period if you're holding the units as rentals, or it converts to principal and interest if that's part of the lender's terms. The interest rate on construction finance is typically higher than a standard home loan, often sitting between 0.3% and 0.8% above the lender's variable rate for investment lending.

During the construction phase, you're paying interest on the progressive amount drawn, not the full loan. If your loan amount is $1.82 million and only $500,000 has been drawn for land and slab stages, your monthly interest is calculated on $500,000. At a construction loan interest rate of 6.5%, that's roughly $2,700 per month. As more funds are drawn, the interest cost increases, but it's still lower than servicing the full loan from day one.

Why Council Approval and Development Application Timing Affects Settlement

Council approval must be finalised before you settle on the land, because lenders won't release construction funds without confirmed subdivision or strata approval. The development application process in Camden Council can take three to six months, depending on the project's complexity and whether there are objections or requests for additional information. If you're buying a site that already has approval, you can move to settlement faster. If approval is still pending, your contract should include a clause that allows you to delay settlement until the DA is granted.

When purchasing land in Narellan for multi-unit development, the contract often includes a sunset clause that gives you a set period to obtain approval and commence building. If you don't start within that timeframe, the contract can be voided or renegotiated. Lenders also require that you commence building within a set period from the settlement date, usually 12 months. If construction doesn't start, the loan may revert to a standard land loan with full principal and interest repayments, which significantly increases holding costs.

Fixed Price Contracts Versus Cost Plus Contracts in Multi-Unit Builds

A fixed price building contract locks in the total construction cost, and the builder absorbs any cost overruns. A cost plus contract charges you the actual cost of materials and labour, plus a margin for the builder. Fixed price contracts are preferred by lenders because they reduce funding risk, and they're required for most construction loans unless you're an experienced developer with a track record. Cost plus contracts can work if you have a strong relationship with the builder and want more flexibility in design or finishes, but they require a larger contingency buffer and more detailed reporting at each drawdown.

For a four-townhouse project in Narellan, a fixed price contract might come in at $1.4 million total, with each unit costed individually or as a bundled figure. The contract should specify inclusions, exclusions, and the progress payment schedule. If the builder asks for 10% upfront, 20% at slab, 20% at frame, 20% at lockup, 20% at fixing, and 10% at completion, that's a standard schedule. Any request for larger upfront payments or irregular staging should be questioned, as it can signal cashflow issues on the builder's end.

How to Structure the Loan if You're Selling Units Off the Plan

If you're selling units off the plan, lenders will require presale contracts for a minimum percentage of the units before approving the construction loan. Typically, that's 70% of the total units, which means three out of four townhouses in the Narellan example. Presale contracts reduce the lender's risk and demonstrate demand for the product. The loan is repaid as each unit settles, and the final unit can either be sold or retained and refinanced onto a standard investment loan.

Your solicitor will coordinate settlement timing so that each unit's sale proceeds are applied to the loan balance before the next settlement. If the construction loan balance is $1.82 million and the first townhouse sells for $750,000, that reduces the loan to $1.07 million. The second sale for $750,000 reduces it to $320,000, and so on. If you're holding one unit, the remaining loan balance is refinanced based on that property's value and rental income.

Borrowing Capacity and Serviceability for Development Projects

Your borrowing capacity for a multi-unit development is assessed on your ability to service the loan during construction and after completion. During construction, lenders model serviceability based on your current income, existing debt, and the interest cost on the progressive drawdown. After completion, they assess rental income from retained units or confirmed sale contracts for units being sold. If you're holding all four townhouses as rentals, the lender will use 80% of the projected rental income to calculate serviceability, and they'll factor in your existing commitments and living expenses.

If you're refinancing an existing property to fund the deposit, that property's equity and rental income will also be considered. Someone with a $1.5 million property portfolio generating $90,000 in annual rent, with $600,000 in existing debt, has roughly $900,000 in usable equity. That's enough to cover the $780,000 deposit for the Narellan project, plus settlement costs and a buffer for holding costs during construction.

A strong relationship with a mortgage broker who understands development finance will make the application process smoother. Brokers who work regularly with construction funding can identify lenders that suit your project type, deposit size, and exit strategy, and they'll help structure the application so that it meets the lender's risk appetite without over-committing your serviceability.

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