Construction loan interest rates are typically 0.5% to 1% higher than standard home loan rates, and you only pay interest on the amount drawn down at each stage of the build.
That structure means your repayments start low and increase as each progress payment is released to your builder. It also means the rate you're quoted upfront isn't the full story. The way your lender calculates interest during construction, the fees attached to each drawdown, and whether you're locked into interest-only repayments all shape what you actually pay.
If you're building in Fairfield, understanding how construction funding works gives you more control over your borrowing cost and helps you plan cash flow through each stage of the build.
How Construction Loan Interest Rates Are Structured
Construction finance is priced higher than a standard home loan because the lender is funding a property that doesn't exist yet. The loan is released in instalments as your builder completes each stage, and you're charged interest only on the funds drawn down so far. That means your repayments increase with each progress payment.
Consider a buyer building a custom home in Fairfield with a land and construction package. They purchase the land for $400,000 and the build contract is $600,000. At settlement, the lender releases $400,000 to pay for the land. If the construction loan interest rate is 6.5%, the buyer pays interest on $400,000 while the slab is poured. Once the frame is up and the second progress payment of $150,000 is released, they're now paying interest on $550,000. By completion, they're paying interest on the full loan amount and the loan converts to a standard home loan with a lower rate.
This progressive drawdown structure means your repayments are lower in the early months, but you need to budget for them to climb as the build progresses. Most lenders offer interest-only repayment options during construction, which keeps your repayments manageable while you're still paying rent or holding another property.
What Drives Your Construction Loan Application Outcome
Lenders assess construction finance differently to a standard purchase. They want to see a fixed price building contract with a registered builder, council approval for the development application, and evidence that you can cover progress payments without financial stress.
Your deposit size, income, and existing debts all matter, but so does the builder's reputation and the contract structure. A cost plus contract, where the final price can move, is harder to get approved than a fixed price contract. Lenders also want to see that construction will commence building within a set period from the disclosure date, usually six to twelve months.
If you're an owner builder, expect fewer lenders to be available and higher rates. Owner builder finance carries more risk because there's no licensed builder guaranteeing the work, and lenders know delays and cost blowouts are more common.
In Fairfield, where there's a mix of knock-down rebuilds and house and land packages, lenders are comfortable with both, but they'll want to see that the land is zoned correctly and that your building plans match council plans. If you're renovating rather than building from scratch, a house renovation loan works differently and may not require the same level of documentation, but rates are often similar.
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The Cost of Each Drawdown
Every time your builder requests a progress payment, the lender needs to send someone out to inspect the site and confirm the stage is complete. That costs money, and most lenders pass it on as a progressive drawing fee or progress inspection fee.
The fee is usually between $200 and $400 per inspection, and if your build has five or six stages, that adds up. Some lenders cap the total, others charge per visit. A few lenders don't charge at all, but their construction loan interest rate might be higher to compensate.
If you're deciding between two lenders, add up the total fees across the build and compare them alongside the rate. A lender with a slightly higher rate but no drawdown fees might cost you the same or less than one with a lower rate and $300 per inspection.
Those fees also affect your builder. If the lender delays an inspection or disputes whether a stage is complete, your builder might not get paid on time. That can slow the project or strain the relationship, so it's worth choosing a lender with a reputation for turning around inspections quickly.
Fixed Versus Variable Rates During Construction
Most construction loans start on a variable rate during the build, then give you the option to fix once construction is complete and the loan converts to a standard home loan. Some lenders let you lock in a fixed rate from the start, but you'll still pay interest only on the amount drawn down.
If rates are rising, locking in a fixed rate early can protect you from paying more as each stage is funded. If rates are falling or stable, a variable rate gives you flexibility and might save you money.
Once the build is done and you've got keys in hand, the loan converts and you can choose a variable rate, a fixed rate, or a split. That's also when your repayments shift from interest-only to principal and interest, unless you negotiate an extended interest-only period.
If you're holding an investment property or managing cash flow across multiple projects, that interest-only option can make a big difference. But if this is your home and you want to pay it down, switching to principal and interest as soon as the build is done saves you money over the life of the loan.
How a Progress Payment Schedule Affects What You Pay
The progress payment schedule is written into your building contract and dictates when your builder gets paid. The lender ties their drawdown schedule to those milestones, and the timing affects how much interest you pay overall.
A build that takes eight months will cost you less in interest than one that drags out to fourteen months, even if the loan amount and rate are identical. If your builder is slow to reach each stage, you're paying interest on the funds already drawn for longer than you planned.
In our experience working with buyers building in Fairfield, delays are common around plumbers and electricians. If your builder can't get a sparky on site to rough in the wiring, the frame stage doesn't get signed off, the next drawdown doesn't happen, and the builder slows down other trades while they wait for payment. That delay costs you interest and extends the build.
You can't control every delay, but choosing a builder with a solid reputation and a realistic timeline reduces the risk. Ask how long their last three projects took and whether they hit their progress payment schedule. If they're consistently late, factor that into your budget.
Access Construction Loan Options That Suit Your Build
Not every lender offers construction finance, and the ones that do have different appetite for different projects. A project home loan with a volume builder on a house and land package is easier to get approved than a custom design with an architect and a small builder.
If you're building a spec home to sell or a custom home with higher-end finishes, you'll need a lender that understands quality construction and doesn't just lend on cookie-cutter designs. If you're buying off the plan, that's technically a different product and the funding works differently because the builder controls the construction timeline, not you.
Working with a renovation finance and mortgage broker who has access to construction loan options from banks and lenders across Australia means you're not limited to what one bank offers. Some lenders cap their loan amount for construction at a lower threshold than their standard home loans. Others won't lend on land and build loans in certain postcodes or with certain builders.
In Fairfield, where there's a strong demand for new home construction finance and knock-down rebuilds, most lenders are active, but knowing which ones move quickly and which ones have the most flexible construction draw schedule makes a difference when you're ready to start.
What Happens If You Want to Make Additional Payments
During construction, most loans are interest-only, which means you're not required to pay down the principal. But some lenders let you make additional payments into an offset or redraw facility, which reduces the interest you're charged as each new drawdown happens.
If you're selling another property or have savings you won't need during the build, parking that money in an offset linked to your construction loan can save you thousands in interest. Just make sure your lender allows it. Not all construction loans come with an offset, and some charge extra for the feature.
Once the build is done and the loan converts, those additional payments roll into the new loan structure and you keep the benefit. If you've been disciplined about putting extra in during construction, you'll start with a lower balance and pay less interest over the life of the loan.
Call one of our team or book an appointment at a time that works for you. We'll compare construction loans across lenders, explain how each progress payment structure works, and help you budget for the full cost of building in Fairfield. Whether it's a land and construction package, a knock-down rebuild, or a renovation, we'll make sure the rate and the loan structure fit how you're building your wealth.
Frequently Asked Questions
How much higher are construction loan interest rates compared to standard home loans?
Construction loan interest rates are typically 0.5% to 1% higher than standard home loan rates. You only pay interest on the amount drawn down at each stage, so your repayments start low and increase as the build progresses.
What is a progressive drawing fee and how much does it cost?
A progressive drawing fee is charged each time the lender inspects your build to release a progress payment. The fee is usually between $200 and $400 per inspection, and most builds require five to six inspections.
Can I fix my interest rate during construction?
Most construction loans start on a variable rate during the build, then let you fix once construction is complete. Some lenders allow you to lock in a fixed rate from the start, but you'll still only pay interest on the amount drawn down at each stage.
What do lenders look for in a construction loan application?
Lenders want to see a fixed price building contract with a registered builder, council approval, and evidence you can cover progress payments. Your deposit, income, and the builder's reputation all affect your approval and rate.
Do construction loans allow additional payments during the build?
Some lenders let you make additional payments into an offset or redraw facility during construction, which reduces the interest you're charged. Not all construction loans offer this feature, so check with your lender before you commit.
