Construction Loan Risks: The Pros and Cons

Construction loans carry different risks to standard home loans because your money releases in stages while you carry the liability from day one.

If you're planning to build in Geelong, you need to understand where things typically unravel. Cost blowouts, builder disputes, and timing delays can all leave you carrying interest on an incomplete build with limited options to recover. The risk isn't that these issues are common, it's that when they do occur, the financial structure of a construction loan can amplify the damage. Knowing where the pressure points sit before you sign anything means you can structure the loan and contract in a way that gives you room to move if something goes sideways.

The Fixed Price Contract That Wasn't Fixed

A fixed price building contract should lock in your total build cost, but variations and exclusions can push the final figure well beyond what you budgeted. Most contracts include a base price that covers standard inclusions, but upgrades to fixtures, changes to the floor plan, or unforeseen site costs like rock removal or drainage work get added as variations. Each variation increases the amount you need to fund, and if your loan approval was based on the original contract price, you may find yourself short when the builder requests the final progress payment.

Consider a buyer building in Highton who signed a contract for a custom design home. The base contract price covered the standard build, but during construction they upgraded kitchen appliances, added a second bathroom, and discovered that the sloping block required additional retaining work that wasn't identified in the initial site assessment. The variations added close to $40,000 to the build cost. Their construction loan was approved based on the original contract, so they had to find the extra funds from savings or apply for a top-up, which delayed the final drawdown and pushed out settlement.

The contract itself is only as fixed as the exclusions list allows. Read the fine print on what's included in the base price and what will trigger a variation. Site costs, council requirements, and any changes you request after signing will all increase the amount you need to fund.

Progress Payment Timing and Cash Flow Pressure

You start paying interest as soon as the first drawdown occurs, but the builder controls when each stage completes and when they request payment. The gap between what you're paying in interest and how much of the build is actually finished creates cash flow pressure that can stretch for months.

Most lenders structure progress payments around five or six stages such as base stage, frame stage, lock-up, fixing, and practical completion. Each stage triggers a drawdown, and you begin paying interest on that amount immediately even though the home isn't habitable. If the builder falls behind schedule or delays requesting a drawdown, you're still carrying interest on the earlier stages without being able to move in or generate rental income if it's an investment build.

During the construction period, you'll typically make interest-only repayment options on the drawn amount while still covering your existing rent or mortgage. If the build drags out due to weather, supply delays, or labour shortages, that dual cost can run for longer than anticipated. Builders in Geelong have experienced timber and trades delays over recent years, which has pushed some builds out by several months beyond the contracted timeframe.

Builder Insolvency and Incomplete Builds

If your registered builder goes into administration before practical completion, you're left with an incomplete build, a loan balance tied to the work already done, and limited options to finish the project without additional funding. The builder's insurance may cover some situations, but it won't cover poor workmanship or delays, and it often won't stretch to the full cost of engaging a new builder to complete the remaining work.

In Victoria, builders are required to hold domestic building insurance, which provides some protection if the builder becomes insolvent or dies during the project. However, this insurance only covers specific events and usually requires you to pursue the claim through a lengthy process. In the meantime, you're paying interest on a loan secured against an unfinished property that may not meet the lender's valuation expectations.

If you're forced to engage a new builder, they'll typically want to re-price the remaining work, and that cost may exceed what's left in your approved loan amount. Lenders are cautious about topping up construction loans mid-project, particularly if the original builder has walked away, because the property's value is uncertain until it reaches practical completion.

Council Approval Delays and Holding Costs

Most construction loans require you to commence building within a set period from the Disclosure Date, usually three to six months. If your development application or council approval drags out beyond that window, the loan approval can lapse and you'll need to reapply, which may result in different rates, conditions, or even a decline if your financial situation has changed.

In Geelong, council plans for certain precincts such as Armstrong Creek or the Bellarine Peninsula can involve additional overlays or design requirements that extend the approval timeline. If your block sits within a heritage overlay, bushfire zone, or area requiring specific environmental assessments, expect the process to take longer than a standard residential block in an established suburb.

While you're waiting for council approval, you're often still committed to the land purchase if you've already settled on a land and construction package. That means you're paying interest on the land component without being able to start the build, which adds to your overall holding costs before construction even begins.

Cost Plus Contracts and Budget Uncertainty

A cost plus contract allows the builder to charge for the actual cost of materials and labour plus a margin, rather than locking in a fixed price upfront. This structure can leave you exposed to price increases during the build, and because the final cost isn't confirmed until the project finishes, it's difficult to secure a loan amount that covers the full scope.

Most lenders prefer fixed price building contracts because they can assess the total loan amount against a known build cost. If you're using a cost plus contract, the lender may only approve a portion of the estimated build cost and require you to cover any overruns from your own funds. This becomes a problem if material costs spike or the build takes longer than anticipated, because you're locked into a loan that may not stretch to the finish line.

Cost plus contracts are more common with custom home finance or owner builder finance arrangements where the design is complex or the scope isn't fully defined at the outset. If you're going down this path, build a buffer into your loan application and your savings to cover the risk of cost increases.

Valuation Shortfalls on Completion

The property's value on completion may come in lower than the total amount you've borrowed, particularly if the market softens during the construction period or if the build cost exceeded typical rates for the area. Lenders require a valuation at practical completion before converting the loan to a standard home loan, and if that valuation falls short, you may be required to pay down the difference or accept a higher interest rate due to increased loan-to-value ratio.

This is a particular risk if you're building a custom design that doesn't align with the typical housing stock in the area. A high-specification build in a suburb where most homes are modest may not achieve the same valuation uplift as a comparable home in a prestige precinct. If you've spent $600,000 on a build in a street where most homes sell for $500,000 to $550,000, the valuer will base their assessment on comparable sales, not on what you've spent.

The gap between build cost and market value becomes your problem if the lender won't settle the final drawdown until you reduce the loan balance. In that scenario, you're stuck covering the shortfall from savings or other equity before the loan converts.

What You Can Control Before You Commit

Most of the risks in construction finance come down to contract structure, builder selection, and how much buffer you build into your loan amount and timeline. Work with a broker who can assess the contract before you sign, confirm that the loan amount covers the full build cost including likely variations, and structure the approval so you have time to manage council delays without the loan lapsing.

Choose a registered builder with a solid track record and verify that their domestic building insurance is current before you make the first payment. Ask for a detailed progress payment schedule that breaks down what gets completed at each stage and when the builder will request each drawdown, so you can forecast your interest costs and cash flow through the build.

If you're building in Geelong and want to talk through the risks specific to your build contract and loan structure, call one of our team or book an appointment at a time that works for you.

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