If you're planning to build an investment property rather than buying established, you'll need construction finance that releases funds in stages as the build progresses.
Most investors in Joondalup consider buying something already standing, but building from the ground up can offer advantages if you're targeting specific rental demographics or looking to maximise yield on a block you already own. The structure of construction loans differs significantly from standard investment loans, and knowing how progressive drawdowns work before you sign a fixed price building contract will save you time and confusion later.
Construction Finance Releases Funds Across Multiple Drawdowns
Rather than receiving the full loan amount upfront, you'll draw funds in instalments as the builder completes specific stages. Lenders typically follow a progress payment schedule tied to milestones such as slab down, frame up, lock-up, and practical completion. You only pay interest on the amount drawn down so far, which means your repayments start lower and gradually increase as more funds are released.
Consider an investor building a duplex in Joondalup who secures a construction loan for the build cost. After the slab is poured, the lender releases the first drawdown, usually around 15 to 20 percent of the total loan amount. Interest charges begin on that portion only. When the frame goes up, another drawdown is released, and interest adjusts accordingly. This structure continues until the final payment at practical completion, when the loan converts to a standard investment loan with principal and interest or interest-only repayment options.
Lenders require progress inspections before releasing each payment. A valuer or building inspector confirms the work matches the claim, then the bank processes the drawdown. Builders invoice you or the lender directly depending on the arrangement, and you'll need to coordinate timing so contractors and sub-contractors are paid promptly.
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How Fixed Price Building Contracts Affect Your Approval
Most lenders prefer a fixed price building contract with a registered builder before they'll approve construction finance. The contract locks in the total build cost, which gives the lender certainty when assessing loan amount and serviceability. If you're going down the owner builder route, your lender options narrow significantly, and some won't touch owner builder finance at all due to the added risk.
In Joondalup, where land and build packages are common in newer estates around Edgewater and Iluka, developers often offer turnkey arrangements that include both the land purchase and a fixed price contract with a project builder. These packages can simplify the approval process because everything is documented upfront. The lender sees the land value, the contract price, and the expected completion date in one submission.
If you've purchased land separately and you're engaging a custom builder, you'll need council approval and detailed plans before most lenders will issue formal approval. Some construction loan applications require a development application number and confirmation that building can commence within a set period from the disclosure date, typically six to twelve months. Missing this window can mean reapplying or extending the approval, which may involve updated valuations and additional fees.
Interest Costs During Construction Run Higher Than You Expect
Because construction loans carry interest-only repayment options during the building phase, and because you're often holding the land without rental income, your out-of-pocket costs can add up quickly. Interest is calculated daily on the drawn amount, and lenders usually add a small margin above their standard variable rate for construction funding. Some also charge a progressive drawing fee each time funds are released, typically a few hundred dollars per drawdown.
In a scenario where you're building a four-bedroom house on a block in Currambine with a six-month construction period, you might draw down around half the loan amount by the halfway point. Interest on that portion, combined with holding costs on the land, means you could be outlaying several thousand dollars a month with no rental income to offset it. Once the build is complete and tenanted, the loan converts to a standard structure and you can switch to interest-only or principal and interest depending on your borrowing capacity and tax strategy.
Some investors underestimate the gap between final drawdown and first rental payment. Even after practical completion, there's often a period for final inspections, occupancy certificates, marketing the property, and tenant settlement. Budgeting for three to four months of holding costs after construction finishes keeps you covered if things take longer than expected.
Land and Construction Packages Versus Buying Land Separately
Buying land and engaging a builder separately gives you more control over design and materials, but it also means coordinating approvals, contracts, and timelines yourself. A land and construction package from a developer bundles everything together, which can speed up the process but limits your flexibility on layout and finishes.
For investors focused on rental yield rather than custom design, a project home on a standard block often makes more sense. Tenants in Joondalup's northern suburbs typically prioritise location, space, and modern fittings over architectural features, so a well-built project home with quality construction and a functional floor plan will perform just as well as a custom design at a lower cost.
If you've already purchased suitable land and you're looking to build, make sure your zoning allows for the intended use. Some blocks in Joondalup's older areas have restrictions on secondary dwellings or density, which can affect whether you can build a duplex or subdivision. Checking with the council before you commit to a builder prevents costly surprises during the development application stage.
Loan Amount and Valuation Depend on Completed Value, Not Build Cost
Lenders assess construction finance based on the expected value of the finished property, not just the build cost. If the land plus construction total is lower than the anticipated end value, you may be able to borrow a higher percentage because the lender sees built-in equity. If the build cost is high relative to the finished value, you'll need a larger deposit to make the numbers work.
A valuer will provide an 'as if complete' valuation during the application process, which estimates what the property will be worth once construction is finished. That figure, combined with the land value, determines your loan-to-value ratio and whether you need lender's mortgage insurance. In areas like Joondalup where land values vary depending on proximity to the city, beach access, and local amenities, the valuer's assessment can differ from your expectations.
If the valuation comes in lower than the combined land and build cost, you'll either need to increase your deposit or reduce the build scope to fit within the lender's maximum loan amount. Running the numbers with a mortgage broker before you sign anything helps avoid that situation.
Converting to Permanent Finance Once Construction Is Complete
When the build is finished and you've received practical completion, the lender conducts a final inspection and converts the construction loan to a standard investment loan. At that point, you can choose principal and interest or interest-only repayments depending on your cash flow and tax position. Some lenders offer interest rate discounts once the loan converts, while others maintain the same rate throughout.
If you started with a variable construction loan interest rate, you also have the option to fix part or all of the loan after conversion. Locking in a portion of the debt can provide certainty on your holding costs, especially if you're managing multiple investment properties or you expect interest rate movements in the near term. The process is straightforward, but you'll need to request the switch before the conversion happens, as some lenders require notice.
If your situation has changed during the construction period, such as a new job, additional income, or other debts, the lender may reassess your serviceability before finalising the conversion. In most cases, if nothing material has shifted, the conversion is automatic. If your circumstances have improved, it's also an opportunity to request better terms or refinance to another lender if your current rate or features no longer suit.
Call one of our team or book an appointment at a time that works for you to talk through how construction finance fits your investment plans and what lenders are offering for projects in Joondalup right now.
Frequently Asked Questions
How does interest work on a construction loan for an investment property?
You only pay interest on the amount drawn down at each stage of construction, not the full loan amount upfront. Interest is calculated daily on the drawn balance and typically charged at a slightly higher rate than standard variable loans during the building phase.
Do I need a fixed price building contract to get construction finance?
Most lenders require a fixed price contract with a registered builder before approving construction finance. This gives the lender certainty on the total build cost and helps them assess your loan amount and serviceability accurately.
What happens to my construction loan once the build is finished?
After practical completion and a final inspection, the lender converts your construction loan to a standard investment loan. You can then choose principal and interest or interest-only repayments, and you may have the option to fix part or all of the loan at that point.
Can I build an investment property if I use an owner builder arrangement?
Some lenders will finance owner builder projects, but your options are more limited compared to using a registered builder. Lenders see owner builder arrangements as higher risk, so expect stricter criteria and potentially fewer lenders willing to participate.
How much deposit do I need for construction finance on an investment property?
Deposit requirements depend on the lender and the loan-to-value ratio based on the expected finished value of the property. Most lenders require at least a 10 to 20 percent deposit, and the exact amount depends on the valuation and your financial position.
