Construction finance works differently to a standard home loan because you're not borrowing a lump sum upfront. The money releases in stages as your build progresses, and the features built into these loans directly affect your cashflow, approval requirements, and how much flexibility you have when things inevitably change on site.
Progressive Drawdown: How Your Loan Releases in Stages
Your lender releases funds according to a progress payment schedule that matches specific stages of your build, not when you or your builder ask for them. Most construction loans follow a five or six stage drawdown, starting with the base or slab and finishing with practical completion. Each stage triggers a payment, usually around 10% to 20% of the total contract value, and your lender will require a progress inspection before releasing those funds.
Consider a buyer building in Mindarie on a fixed price building contract worth $550,000. Their lender structures the construction loan with six drawdowns: deposit stage, base complete, frame up, lock-up, fixing, and practical completion. At the frame-up stage, the builder invoices for $110,000. The lender arranges an inspection through a valuer or quantity surveyor, confirms the work matches the invoice, then releases the funds directly to the builder. The buyer doesn't touch that money, and they only start paying interest on the $110,000 once it's drawn down, not before.
Interest Charged Only on Drawn Amounts
You only pay interest on what's been released so far, not the full approved loan amount. During construction, your repayments stay relatively low because the loan balance builds gradually over several months. This is one of the main features that makes construction finance manageable compared to trying to service a full mortgage while still paying rent elsewhere.
If $220,000 has been drawn down across the first three stages, your interest calculation only applies to that amount. The remaining approved funds sit untouched until the next progress payment. Most lenders offer interest-only repayment options during the construction phase, which means you're covering interest costs without paying down any principal until the build finishes and the loan converts.
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Fixed Price Contracts and Why Lenders Prefer Them
Most lenders will only approve construction finance against a fixed price building contract with a registered builder. A fixed price contract locks in the total build cost, which gives the lender certainty about how much they're lending and reduces the risk of cost blowouts halfway through. A cost plus contract, where the builder charges for materials and labour plus a margin, introduces variables that lenders don't like because the final loan amount becomes unpredictable.
In Western Australia, your builder needs to be registered with the Building Services Board. Lenders check this during the construction loan application process, and if your builder isn't registered or doesn't carry the right insurance, your application won't proceed. This requirement exists whether you're building in Cottesloe or Padbury, and it applies to project home builders and custom builders equally.
Council Approval and Development Application Requirements
Your lender won't release any funds until you provide council approval for your build. This means your development application needs to be submitted, assessed, and approved before settlement on the land, or before the first drawdown if you already own the block. Some lenders also require you to commence building within a set period from the disclosure date, usually six or twelve months, to prevent land banking or indefinite delays.
If your build includes unusual design elements or sits in a heritage overlay zone, expect the council approval process to take longer. Lenders won't extend a formal construction loan approval indefinitely, so timing your application correctly matters. We regularly see buyers in older coastal suburbs like Trigg or Scarborough run into longer approval times because of local planning overlays, and that can affect when the loan needs to be formally applied for versus when the land settles.
Progressive Drawing Fees and Inspection Costs
Most lenders charge a progressive drawing fee, sometimes called a progress payment fee, each time funds are released. This fee typically sits between $200 and $400 per drawdown and covers the cost of the progress inspection and administration. Over a six-stage build, that adds up to somewhere between $1,200 and $2,400, and it's not always highlighted upfront when you're comparing construction loan options.
Some lenders cap the total progressive fees regardless of how many drawdowns occur, while others charge per inspection. If your builder requests additional drawdowns beyond the standard schedule because of how they've structured payments to sub-contractors or material suppliers, those extra drawdowns can trigger extra fees. Knowing whether your lender caps these costs or charges per event changes the total cost of your construction funding.
Land and Construction Packages Versus Buying Land First
A land and construction package bundles the land purchase and build contract together, often through a project home builder offering house and land packages in new estates. Lenders treat these differently to scenarios where you buy suitable land first, then engage a builder later. With a package, the builder and developer have usually worked together before, the土地 is titled and ready to build on, and council plans are often pre-approved or templated.
If you're buying land separately in an established suburb and engaging a custom builder for a custom design, the lender needs to assess the land, the builder, and the contract independently. The process takes longer and requires more documentation, but it gives you control over the design and the block you're building on. Both approaches work, but they suit different buyers depending on whether location flexibility or design flexibility matters more.
Owner Builder Finance and Why It's Harder to Access
Owner builder finance is available in Western Australia, but far fewer lenders offer it and the loan-to-value ratio is usually capped lower than if you're using a registered builder. Lenders see owner builders as higher risk because there's no registered builder carrying insurance, no fixed price contract, and a higher chance of delays or cost overruns. If you do find a lender willing to approve owner builder finance, expect to need a larger deposit and provide detailed project costings including quotes from plumbers, electricians, and other sub-contractors before drawdown approval.
Most owner builders also need to prove relevant building experience or qualifications before a lender will consider the application. The process is more involved and the interest rate is often higher, so unless you have genuine building experience and a clear cost advantage, using a registered builder usually makes more financial sense when you're relying on construction funding to complete the project.
Construction to Permanent Loan Conversion
Most construction loans automatically convert to a standard variable or fixed rate home loan once the build reaches practical completion. You don't need to reapply or go through a second approval process. The loan transitions from interest-only repayments on a progressively drawn balance to principal and interest repayments on the full amount, and your repayment schedule adjusts accordingly.
Some lenders require a final inspection and valuation before they'll convert the loan, particularly if the build took longer than expected or if there were variations to the original contract. Once the conversion happens, you can refinance, fix your interest rate, or make additional payments without the restrictions that applied during the construction phase. The ability to refinance after completion gives you a chance to reassess your loan structure once the build is finished and you know the final valuation.
If you're planning a new build anywhere in Western Australia and want to understand which construction loan features actually matter for your situation, call one of our team or book an appointment at a time that works for you.
Frequently Asked Questions
Do I pay interest on the full construction loan amount from the start?
No, you only pay interest on the amount drawn down so far, not the total approved loan. As each progress payment releases, your interest calculation increases to include that new amount.
What is a progressive drawing fee on a construction loan?
A progressive drawing fee is charged by the lender each time they release funds during your build, usually between $200 and $400 per drawdown. This covers the cost of progress inspections and administration.
Can I get construction finance if I'm building as an owner builder in WA?
Yes, but fewer lenders offer owner builder finance and the loan-to-value ratio is usually lower. You'll need a larger deposit, detailed project costings, and often proof of building experience or qualifications.
Why do lenders require a fixed price building contract?
A fixed price contract locks in the total build cost, which gives the lender certainty about the loan amount and reduces the risk of cost blowouts. Cost plus contracts introduce variables that most lenders won't approve.
What happens to my construction loan after the build finishes?
Most construction loans automatically convert to a standard home loan once you reach practical completion. The loan transitions from interest-only on a progressive balance to principal and interest on the full amount.
