Understanding the basics of Construction Loan Structures

How Construction Finance Differs from a Standard Home Loan

Construction finance releases funds progressively as your build reaches set milestones, not in one lump sum at settlement. You only pay interest on the amount drawn down at each stage, which keeps repayments lower during construction. Once building finishes, the loan converts to a standard home loan structure with principal and interest repayments.

This progressive structure suits new builds, knockdown rebuilds, renovations, and house and land packages where the property doesn't exist yet or isn't habitable during the work. The approach matches funding to actual building progress, so you're not paying interest on money sitting idle.

Consider a buyer building a custom home in Armadale. They secure suitable land first, then arrange construction finance structured around five drawdowns tied to foundation, frame, lock-up, fixing, and completion stages. At frame stage, they've drawn roughly 40% of the total loan amount and are charged interest on that portion alone. By lock-up, another 25% is released. The final 35% comes through at practical completion, at which point the loan switches to standard repayment terms.

Construction to Permanent Loan or Split Structure

Most construction finance automatically converts to a permanent home loan once the build completes, which avoids reapplying or paying a second set of establishment fees. You nominate your preferred loan features upfront, such as offset accounts or interest-only repayment options during construction, and these activate once the property is finished.

Some borrowers split their loan amount between fixed and variable portions to balance certainty with flexibility. A portion on a fixed rate locks in repayments during construction, while the variable portion allows additional payments without penalty. This structure works when you expect irregular income or bonuses and want the option to reduce debt faster without triggering break costs.

Lenders vary in how they handle the transition. Some offer interest-only terms during construction and for a set period after, which suits buyers managing cashflow while furnishing or settling into the property. Others shift to principal and interest repayments immediately at practical completion. Clarifying this timing during your construction loan application prevents surprises when the first full repayment is due.

How the Progressive Drawdown Schedule Works

The construction draw schedule ties payments to specific building stages verified by a progress inspection. Your builder submits a claim, the lender arranges an inspection to confirm the work matches the claim, and funds are released directly to the builder within a few business days.

Most lenders structure drawdowns around five or six stages: base or slab, frame, lock-up, fixing, and practical completion. Some include an initial land payment if you're financing land and construction together. Each stage represents a percentage of the total contract price, and the schedule is agreed before construction begins.

Lenders charge a progressive drawing fee at each stage to cover inspection costs and administration. This fee typically ranges from $200 to $400 per drawdown, depending on the lender and the property location. For a five-stage build, you could pay $1,000 to $2,000 in drawdown fees across the project. These fees are separate from the construction loan interest rate and are usually deducted from the drawdown amount or charged to your loan account.

If your build is delayed or stages take longer than expected, you continue paying interest only on the drawn amount until the next stage is reached. This protects you from paying interest on the full loan during delays, but it also means your builder controls the pace of drawdown releases based on their progress.

Fixed Price Contracts and Cost Plus Structures

A fixed price building contract sets the total construction cost upfront, and your lender approves the loan amount based on that figure. The builder absorbs cost overruns unless you request variations, which must be approved by the lender before additional funds are released. This structure offers certainty and limits your financial exposure during the build.

A cost plus contract, more common with custom builds or where the scope isn't fully defined, charges for actual costs plus a builder's margin. You pay for materials, labour, and subcontractors as invoices arrive, with the lender releasing funds against those receipts. This structure requires more active management and a larger contingency buffer, because final costs aren't locked in at the start.

Most lenders in Australia prefer fixed price contracts for residential construction finance, as they reduce risk for both borrower and lender. If you're building a custom design in Armadale with a registered builder, expect the lender to request a fixed price building contract, council approval, and evidence that you can commence building within a set period from the disclosure date. Owner builder finance is available but attracts higher interest rates and stricter conditions, as lenders view it as higher risk.

Land and Construction Packages

A land and construction package combines the land purchase and building contract into a single loan, which simplifies the application and avoids double settlement costs. You buy the land, construction begins within the lender's required timeframe, and drawdowns progress as usual. The loan amount covers both components, and you only pay interest on the land portion until construction drawdowns begin.

This structure suits buyers purchasing in new estates or through project home builders offering turnkey solutions. You need council plans approved and a fixed price contract in place before the lender will settle on the land. Some lenders also require a registered builder and proof that the land is suitable for the proposed dwelling.

If you're buying land separately and arranging construction later, you'll need to refinance or structure the loan to accommodate the build once you're ready. This adds an extra application step but offers more flexibility if you're not ready to commit to a builder immediately. Vacant land loans typically require a higher deposit than land and build packages, as the lender has no dwelling as security during the land-only phase.

Interest Costs During Construction

You're charged interest only on the amount drawn down, calculated daily and charged monthly. If you've drawn $200,000 at frame stage on a $500,000 loan, you pay interest on $200,000 until the next drawdown. At current variable rates, this could be $1,200 to $1,400 per month, depending on your loan terms and lender.

Some lenders let you capitalise interest during construction, meaning they add it to the loan balance rather than requiring monthly payments. This reduces cashflow pressure while building but increases your final loan amount and the interest you'll pay over the life of the loan. Others require interest payments from the first drawdown, which keeps your loan balance lower but demands available income or savings during construction.

If your build runs over schedule, your interest-only period extends until practical completion. A six-month build that stretches to nine months means three extra months of interest-only payments. Planning for potential delays when calculating your construction budget avoids cashflow strain if timelines shift.

Choosing the Right Structure for Your Build

Your choice between a standard construction loan, a split rate approach, or interest capitalisation depends on your income stability, timeline, and how much control you want over repayments during the build. If you're renovating your house rather than building new, the structure changes slightly, with drawdowns tied to renovation stages rather than new construction milestones.

For project home builds with a fixed price contract, a straightforward construction to permanent loan works well. For custom builds where scope might shift or where you're managing multiple trades, a structure with more flexibility around additional payments or redraw could suit your circumstances. If you're self-employed or have variable income, interest-only repayment options during construction can smooth cashflow while you're managing other building costs.

Lenders assess your application based on the finished property value, not just the land and contract price. If you're building a high-quality custom home in Armadale, where the finished value exceeds the construction cost, this can improve your borrowing capacity and reduce the deposit required. Conversely, if you're building in an area where completed values are uncertain, the lender may apply a more conservative valuation and require a larger deposit.

Call one of our team or book an appointment at a time that works for you. We'll walk through your building plans, compare construction finance options from banks and lenders across Australia, and structure your loan to match your build timeline and budget.

Frequently Asked Questions