Do you know how Construction Loan Structures work?

How Construction Loans Differ From Standard Home Loans

A construction loan releases funds in stages as your build progresses, not as a single lump sum at settlement. You only pay interest on the amount drawn down at each stage, which means your repayments start small and increase as more of the loan is released. Most lenders charge interest-only repayment options during the construction period, then convert to principal and interest once the build is complete and you move in.

Consider a client building a custom home in Montrose who's arranged a $650,000 loan amount. At first drawdown for the slab, they might receive $130,000. Interest for that first month is calculated only on $130,000, not the full loan. When the frame goes up and another $150,000 is released, interest is then calculated on $280,000. This progressive drawdown continues until the final payment at practical completion. The structure protects both you and the lender because funds are only released when work is verified.

The Two Main Construction Loan Structures

Most lenders offer either a construction to permanent loan or a land and construction package, depending on whether you already own the land. If you own a block in Montrose outright or with existing equity, a standard construction facility covers the build only. If you're purchasing land and building simultaneously, the package finances both components under one approval, often with a requirement to commence building within a set period from the Disclosure Date.

The land and build loan structure typically involves two contracts: one for purchasing suitable land and another with a registered builder. Lenders assess both the land value and the proposed build cost, then approve a total facility. You settle on the land first, then drawdowns commence once council approval and building permits are in place. Some lenders allow you to make additional payments toward the land portion during construction to reduce the overall debt before conversion.

How the Progress Payment Schedule Works

Your building contract will outline a progress payment schedule tied to specific milestones such as base stage, frame stage, lock-up, fixing, and practical completion. The lender's valuer inspects the site at each stage to confirm work has been completed to the required standard before releasing funds. Most lenders charge a Progressive Drawing Fee or progress inspection fee for each valuation, typically between $150 and $400 per drawdown.

In a fixed price building contract, the payment amounts are predetermined as percentages of the total contract price. A cost plus contract, more common with owner builder finance or custom design projects, requires detailed invoices from sub-contractors like plumbers and electricians before each drawdown. The builder submits a payment claim, the valuer inspects, and if satisfied, the lender releases funds directly to the builder or into your nominated account depending on the arrangement.

Interest Charges During Construction

You only pay interest on funds that have been drawn down, not on the approved loan amount. During the build, most lenders offer interest-only repayments, which keeps your monthly commitment lower while you're often still paying rent or covering another mortgage. Once the build reaches practical completion and you receive your occupancy certificate, the loan converts to a standard principal and interest home loan unless you've arranged otherwise.

The construction loan interest rate is sometimes slightly higher than a standard variable rate, typically by 0.10% to 0.30%, though some lenders price them identically. Fixed price contracts with project home builders generally attract more competitive pricing than custom builds or owner builder arrangements because the lender views the risk as lower. It's worth comparing how lenders structure their rates and fees when you're weighing up construction finance options.

What Happens If Your Build Runs Over Time or Budget

Most construction loans include a construction period of 12 months, with some lenders extending to 18 or 24 months for larger or more complex projects. If your build takes longer than the agreed period, lenders may extend the construction phase but often charge an additional fee or adjust the interest rate. Delays in council plans, weather, or availability of materials can push timelines out, so building in a buffer when applying is sensible.

If your build goes over budget, you'll need to cover the shortfall from your own funds or seek a loan top-up, which requires a new application and valuation. In our experience, clients building custom homes in hilly areas around Montrose sometimes encounter unexpected site costs such as retaining walls or additional earthworks. A good builder will flag these risks early, and a construction draw schedule with contingency built in reduces the chance of being caught short.

Comparing Fixed Price Contracts and Cost Plus Arrangements

A fixed price building contract specifies the total build cost upfront, and the builder absorbs any cost overruns. This structure suits most clients because it provides certainty and makes the construction loan application more predictable for lenders. The builder invoices according to the agreed progress payments, and the lender releases funds based on the valuer's confirmation that each stage is complete.

A cost plus contract, where you pay the actual cost of materials and labour plus a builder's margin, offers more flexibility for custom design projects but requires tighter management. Lenders treat these arrangements as higher risk, so you may need a larger deposit or accept a higher construction loan interest rate. You'll also need to provide detailed invoices and receipts at each drawdown to satisfy the lender's valuer. This structure works well for owner builders or clients working with architects on a build dream home project, but it demands more documentation and hands-on involvement.

Converting to a Permanent Loan After Completion

Once your build is finished and you have an occupancy certificate, the lender revalues the property and converts the construction facility to a standard home loan. The revaluation is important because it establishes the completed property value, which affects your loan-to-value ratio and whether you'll need to pay lenders mortgage insurance on the permanent loan. If the property values higher than the combined land and build cost, your equity position improves immediately.

The conversion usually happens automatically, though you'll receive new loan documents reflecting the switch from interest-only to principal and interest repayments. Some clients choose to refinance at this point to access a lower rate or better features from another lender, particularly if they've built significant equity during construction. If you're planning to hold the property as an investment, switching to interest-only on the permanent loan is also an option worth discussing during the construction loan application.

Choosing the Right Structure for Your Montrose Build

Montrose attracts a mix of project home builders working on house & land packages and custom builds taking advantage of the elevated blocks and bushland outlook. The type of build you're planning influences which construction loan structure suits you. If you're working with a volume builder on a fixed price contract, most lenders will offer standard construction finance with competitive pricing and a clear Progressive Payment Schedule.

If you're building a one-off custom home with an architect or engaging in a house renovation loan that involves substantial structural work, expect lenders to take a closer look at the plans, costings, and builder's credentials. Some lenders won't touch owner builder finance or spec home finance, while others specialise in it. Access to construction loan options from banks and lenders across Australia means you're not locked into one approach. We work with clients in Montrose regularly, and matching the loan structure to the build type and your financial position is where the real value sits.

Call one of our team or book an appointment at a time that works for you. We'll walk through your plans, talk to your builder if needed, and set up a structure that keeps the build moving without surprises.

Frequently Asked Questions