Common Mistakes When Buying Multi-Unit Development Sites

Buying a multi-unit development site is different from purchasing a house to live in or even a single investment property.

You need specialised construction finance that releases funds in stages as the project progresses, and lenders assess the application based on the development's viability rather than just your income. Getting the structure wrong upfront can lock you into terms that make the project unworkable halfway through, or leave you short when you need to pay sub-contractors.

How Construction Finance Works for Multi-Unit Developments

Construction finance for a multi-unit development releases loan funds progressively as building stages are completed, rather than in one lump sum at settlement. Lenders only charge interest on the amount drawn down at each stage, which keeps borrowing costs lower during the build. A quantity surveyor or bank valuer inspects the site at each stage before approving the next drawdown.

The approval process considers the land purchase price, construction costs, your experience as a developer or builder, and the projected end value of the completed units. Lenders want to see a feasibility study showing the project can generate profit or rental income that justifies the risk. If you are an owner builder without prior development experience, some lenders require additional equity or limit the loan amount.

Development Approval and Council Plans Before You Apply

You need council approval and detailed building plans before most lenders will formally approve a construction loan for a multi-unit site. Some lenders offer conditional pre-approval based on your financial position and the land contract, but final approval depends on the development application being accepted by the local council and a registered builder providing a fixed price building contract.

Canning Vale sits within the City of Canning, which has specific planning requirements for multi-unit developments around setbacks, density, and parking. Processing times for development applications vary, and if council requires design changes, that can delay your construction loan settlement. Starting the loan application in parallel with the development application reduces waiting time, but both need to align before funds are released.

Why a Fixed Price Building Contract Matters

Most lenders require a fixed price contract from a registered builder before they approve construction funding for a multi-unit project. A cost plus contract, where you pay the builder's costs plus a margin, introduces uncertainty around the final loan amount and makes it difficult for the lender to assess whether the project remains viable if costs increase.

Consider a developer purchasing a 1,012 square metre site in Canning Vale zoned for four units. The builder quotes a fixed price of $680,000 for construction, with stage payments tied to slab down, frame up, lockup, fixing, and practical completion. The lender advances funds at each stage after a progress inspection confirms the work is complete. If the builder had proposed a cost plus contract instead, the same lender would have either declined the application or required a larger cash buffer held in reserve, reducing the amount available for the land purchase.

Progress Payment Schedule and Drawing Fees

The progress payment schedule outlines when funds are released during construction, typically in five to seven stages depending on the project size. Each drawdown requires a progress inspection by the lender's valuer, and most lenders charge a Progressive Drawing Fee of around $300 to $400 per inspection. Over a six-stage build, those fees add up to around $2,000, which should be factored into your project budget.

Lenders assess whether each stage has been completed before releasing the next payment. If the builder falls behind schedule or the valuer identifies incomplete work, the drawdown can be delayed. That delay impacts your ability to pay sub-contractors like plumbers and electricians on time, which can slow the project further. Setting aside a contingency of 5% to 10% of the construction budget helps cover unexpected costs without needing to renegotiate the construction loan partway through.

Interest-Only Repayments During Construction

Most construction loans offer interest-only repayment options during the build period, meaning you only pay interest on the funds drawn down so far rather than principal and interest on the full loan amount. Once construction is complete and the units are registered, the loan typically converts to principal and interest repayments, or you can refinance into separate loans for each unit if you plan to sell some and hold others.

For a multi-unit project in Canning Vale, interest-only repayments during the 12 to 18 month construction period keep your holding costs lower while the property generates no income. Once the units are complete, you can either sell them to repay the construction loan, retain them as investment properties with rental income covering repayments, or refinance into a standard investment loan structure.

When You Need to Commence Building

Most construction loan approvals require you to commence building within a set period from the disclosure date, typically six to twelve months. If construction has not started within that window, the approval may lapse and you will need to reapply. Interest rates, lending policies, and your financial position may have changed by then, which can affect the loan amount or terms.

Delays in obtaining council approval, engaging a registered builder, or finalising the fixed price building contract can push you past that commencement deadline. In Canning Vale, where demand for suitable land has increased in recent years, buyers sometimes purchase a development site before finalising builder quotes or development approval. That approach creates risk if the project takes longer to start than expected and the construction loan approval expires.

Finding Suitable Land in Canning Vale

Canning Vale has a mix of residential areas, light industrial zones, and commercial precincts. Suitable land for a multi-unit development is typically in the R30 to R60 density zones, which allow for grouped dwellings or multiple dwellings on one title. Blocks near Livingston Marketplace or close to Nicholson Road tend to attract buyer interest due to access to schools and the Roe Highway.

When assessing a potential site, lenders consider the zoning, whether the land can support the density you are proposing, and whether comparable developments in the area have sold successfully. A site that looks viable based on land price alone may not stack up financially once construction costs, holding costs, and sales commissions are included. Running the numbers with a mortgage broker before you make an offer helps confirm the project is feasible.

Most lenders will lend up to 70% to 80% of the combined land and construction costs for an experienced developer, or 60% to 70% if you have not completed a multi-unit project before. The remaining equity needs to come from cash savings, existing property, or other security. If the land purchase uses most of your available deposit, you may not have enough left to cover the equity portion of the construction loan.

What Happens If You Want to Build a Custom Design

A custom design for a multi-unit development typically costs more than using a project home layout, but it allows you to make better use of the site and potentially achieve higher sale prices or rental yields. Lenders assess custom designs the same way they assess project homes, but they pay closer attention to whether the design is practical and whether the end value justifies the higher construction cost.

If the design includes uncommon features or materials that make the units harder to sell or value, some lenders may reduce the loan amount or require additional equity. Working with a builder experienced in multi-unit projects and providing detailed plans and costings upfront improves your chances of approval. The construction loan application process for a custom design can take longer because lenders need more time to assess feasibility.

Once you have formal loan approval and construction begins, you will work through the progressive drawdown process at each stage. Staying in regular contact with your builder and keeping the lender informed if any issues arise helps keep the project moving and reduces the chance of funding delays.

Purchasing a multi-unit development site and funding construction through to completion involves more moving parts than a standard home loan, but the structure allows you to build equity through development rather than just holding property. Making sure the land suits the project, the construction loan terms align with your build timeline, and your equity position can support both the land purchase and construction costs gives you a solid foundation to move forward.

Call one of our team or book an appointment at a time that works for you to discuss how construction finance can be structured for your next development project.

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