Avoid These 5 Construction Loan Preparation Mistakes

Most construction loan applications stall because the preparation happened in the wrong order. You need council approval locked in, building costs detailed to the dollar, and drawdown timing mapped before a lender will take the conversation seriously.

Building a new home means coordinating builders, council, lenders, and timelines that all depend on each other. The difference between a smooth approval and a delayed start often comes down to how well you prepare the application upfront. This article walks through the specific mistakes that slow down or derail construction finance, and what to do instead.

Starting Without Council Approval or a Development Application Lodged

Lenders will not approve construction loans until they see that council has either approved your plans or that a development application is at least formally lodged. They need certainty that the build can legally proceed before they commit funding.

Consider a couple planning a custom design on a block in Riverside. They approached a broker with sketches and a builder's rough quote, expecting to secure finance and then finalise council plans. The lender declined to proceed until the development application was submitted and acknowledged by council. That added six weeks to their timeline, which pushed their intended start date into winter and delayed settlement on the land they had under contract.

If your build requires a development application, lodge it early. If it's exempt or only needs a building permit, get that permit in hand. Lenders assess construction finance based on certainty, and without formal council acknowledgment, your application has none.

Using a Cost Plus Contract Instead of a Fixed Price Building Contract

A fixed price building contract gives the lender a clear view of total project cost and removes the risk of budget blowouts. A cost plus contract, where the builder charges actual costs plus a margin, introduces uncertainty that most lenders will not accept for standard construction finance.

In our experience, applicants who present cost plus arrangements either need to renegotiate with the builder for a fixed price contract or seek specialist funding, which typically comes with higher interest rates and stricter drawdown conditions. Lenders want to know the exact loan amount required and that the build will not exceed it halfway through. Cost plus arrangements make that impossible.

If your builder is reluctant to offer a fixed price, ask why. It may indicate uncertainty about site conditions, design complexity, or the builder's own capacity. Those are risks a lender will not take on, and neither should you without a clear funding strategy.

Submitting a Construction Draw Schedule That Does Not Match the Builder's Progress Payment Schedule

Your builder will expect progress payments at specific stages: slab down, frame up, lockup, fixing, and practical completion are the typical milestones. Your lender will release funds based on their own construction draw schedule, which should align with those stages. If the two schedules do not match, you will be caught funding the gap out of pocket or delaying the builder.

Lenders charge a Progressive Drawing Fee each time they release funds, and they will only do so after a progress inspection confirms the stage is complete. If your builder expects payment on the 15th of the month but the lender's inspection is not scheduled until the 20th, that is five days where the build may pause or you need to cover the amount personally.

Before lodging your application, sit down with your builder and your broker. Match the progress payment schedule to the lender's drawdown structure. If there are gaps, negotiate timing with the builder or factor in a buffer amount in your loan to cover short-term mismatches. This is not something you sort out during the build.

Not Allowing Enough Time Between Approval and the Requirement to Commence Building

Most construction loan approvals require you to commence building within a set period from the Disclosure Date, often 90 to 120 days. If you are still waiting on final council sign-off, your registered builder is booked out, or site works are delayed, that window closes fast.

We regularly see applicants rush to submit an application because they want approval in hand, but they have not confirmed the builder's start date or whether the site is ready for earthworks. The approval comes through, the clock starts, and then they realise the builder cannot start for another four months. At that point, the approval may lapse or need revalidating, which means updated financials, another credit check, and potentially a different interest rate.

Do not apply until your builder has given you a confirmed start date and you know the site is ready. If there are delays outside your control, talk to your broker about extending the commencement period before the approval is issued, not after.

Underestimating What You Need Beyond the Build Cost

The building contract covers the structure, but it does not cover everything you need to move in. Driveways, fencing, landscaping, letterbox, clothesline, window coverings, and connection fees for power, water, and sewerage all sit outside the builder's scope. So do any upgrades or variations you request during the build.

A borrower building a project home on suitable land in Launceston secured a land and construction package with a loan amount that covered the land, the build, and a small buffer. Halfway through construction, they realised the driveway and retaining wall would cost another $18,000, and the builder's quote did not include floor coverings in the garage or laundry. They had to apply for a top-up, which required another valuation and serviceability check. It delayed final drawdown and added costs they had not planned for.

When you are working out how much to borrow, add at least 10% to 15% on top of the builder's contract price to cover these extras. Your broker can help structure the loan amount to include a contingency without over-borrowing. Lenders will only fund what the valuer assesses as reasonable, so the contingency needs to be realistic and justified upfront.

Choosing the Wrong Loan Structure for Your Build Timeline

Construction loans only charge interest on the amount drawn down, not the full loan amount. During the build, most borrowers make interest-only repayments, which keeps costs low while the property is not yet liveable. Once construction is complete, the loan converts to a standard home loan with principal and interest repayments.

If your build is going to take longer than six months, the interest-only repayment option during construction becomes more important. If you are also carrying a mortgage or paying rent elsewhere, you need to factor in dual accommodation costs. If you are building an investment property, you need to understand when the loan converts and how that affects your cash flow.

Some lenders offer a construction to permanent loan, which means one application, one approval, and a seamless switch from construction funding to a standard home loan. Others require you to reapply once the build is finished, which introduces risk if your financial situation has changed or rates have moved. Ask your broker which structure suits your situation, and make sure the loan documents reflect that from the start.

You can explore how different loan structures affect your repayments by reviewing your current position with a loan health check, or if you are weighing up construction versus buying established, a broker can model both scenarios side by side.

Preparation is the difference between a build that starts on time and one that sits in limbo while you chase paperwork. Council approval, a fixed price contract, matched drawdown schedules, realistic timing, a proper contingency buffer, and the right loan structure are not optional. They are the foundation of a construction loan application that actually gets approved and funded without drama.

Call one of our team or book an appointment at a time that works for you. We will walk through your build timeline, check your documents, and make sure everything is ready before you lodge.

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