Beginner's Guide to Construction Loans for Investment

Building an investment property from scratch can deliver stronger rental returns and depreciation benefits than buying established, but most lenders treat construction finance very differently to standard home loans.

The biggest difference is that you don't receive the full loan amount upfront. Instead, the lender releases funds in stages as construction progresses, and you only pay interest on the amount drawn down so far. That structure protects the lender, but it also means you need to understand how drawdown schedules work, what documentation you'll need at each stage, and how to avoid delays that can blow out your timeline and budget.

Banks also apply tighter serviceability tests for construction loans because they're assessing your ability to service a loan that hasn't yet produced any rental income. If you're holding another property or paying rent elsewhere during the build, that adds to your commitment levels. Lenders want to see a registered builder, council approval, and a fixed price building contract before they'll consider your application.

How Construction Finance Differs for Investment Properties

Construction loans for investment properties follow the same progressive drawdown structure as owner-occupied builds, but lenders assess your application based on projected rental income rather than your intention to occupy the property. You'll need to demonstrate that the completed property will generate enough rent to meet serviceability ratios, which most lenders calculate at around 80% of the projected rental income to account for vacancies and maintenance.

Consider a scenario where you're building a dual-occupancy development on a block in southern Sydney. The land cost $800,000, and the construction contract is $600,000. Your lender will assess your ability to service a $1.4 million loan based on the combined rental income from both dwellings once complete, minus a 20% buffer. If the bank's valuer estimates $1,200 per week in combined rent, the lender will calculate serviceability using $960 per week. If your existing commitments don't leave enough capacity, the application stalls before construction even begins.

Most lenders also require a larger deposit for investment construction, typically 20% of the total project cost, compared to 10% or less for owner-occupied builds. That deposit needs to cover both the land purchase and a portion of the construction contract. If you're using equity from another property, the lender will assess the combined loan-to-value ratio across your entire portfolio, not just the new build.

Fixed Price Contracts and Why Lenders Insist on Them

Lenders will almost always require a fixed price building contract with a registered builder before they approve construction funding. A fixed price contract locks in the total build cost, which means the lender knows exactly how much they're lending and can structure the drawdown schedule around agreed milestones. Without that certainty, the lender has no way to assess whether the project will stay within budget or whether you'll come back asking for more funds halfway through.

Cost plus contracts, where you pay the builder's costs plus a margin, are rarely accepted by mainstream lenders because the final price isn't fixed. The same applies to owner builder finance, which is only available through a small number of specialist lenders and typically comes with higher interest rates and lower loan-to-value ratios. If you're planning to project manage the build yourself and engage subcontractors directly, expect to put down 30% to 40% of the project cost and pay a rate that's at least 1% higher than standard construction finance.

The Progressive Drawdown Schedule and How It Works

Once your construction loan is approved, the lender sets up a progressive drawdown schedule that releases funds at specific stages of the build. The exact stages vary between lenders, but most follow a five or six stage structure: deposit or base stage, slab or frame stage, lockup stage, fixing stage, practical completion, and final inspection.

At each stage, your builder requests a progress payment, the lender arranges a progress inspection to confirm the work has been completed to that stage, and then releases the funds directly to the builder. You don't receive the money yourself. The inspection is usually carried out by a third-party valuer or quantity surveyor, and the lender will charge a Progressive Drawing Fee for each inspection, typically $300 to $500 per drawdown.

Between drawdowns, you're only paying interest on the amount that's been released so far. If the lender has drawn down $400,000 out of a total $600,000 construction loan, you're paying interest on $400,000, not the full amount. That helps keep your repayments lower during the build, but it also means your repayments will increase each time the lender releases another drawdown. Most lenders offer interest-only repayment options during construction, which further reduces your monthly commitment until the build is finished and rental income starts flowing.

Council Approval and Development Application Requirements

No lender will approve construction finance until you've received council approval for the build. That means you need either a construction certificate or a development approval, depending on the type of project. A standard single dwelling on an existing block usually only requires a construction certificate, but dual occupancy, subdivision, or any project that changes the use of the land will need a full development application.

The council approval process can take anywhere from a few weeks to several months, depending on the complexity of the project and the council involved. If your development application requires neighbour notification, heritage assessment, or traffic reports, expect delays. Most construction loans include a condition that you must commence building within a set period from the disclosure date, usually six to twelve months. If your council approval drags out beyond that window, you'll need to reapply for finance, and the lender will reassess your serviceability and the property valuation from scratch.

Land and Construction Packages Versus Buying Land First

You can structure construction finance as either a land and construction package, where you purchase the land and start the build under a single loan, or as two separate transactions where you buy the land first and then apply for construction funding later. A land and construction package is often quicker because the lender assesses everything in one application, but it also requires you to have your building contract and council approval locked in before settlement on the land.

If you're buying vacant land in an area where suitable land is limited, you might not have time to finalise your building plans and get council approval before the land vendor wants to settle. In that case, you'll need to settle on the land using a standard land loan, and then apply for construction finance separately once your plans are approved. The downside is that you'll be paying interest on the land loan during the design and approval phase, which can add months to your timeline and thousands to your holding costs.

Some lenders will roll the land loan into the construction facility once construction starts, which keeps everything under one loan and avoids the need to refinance. Others treat them as separate loans, which means you'll be servicing both the land loan and the construction drawdowns simultaneously until the build is finished and the loans are consolidated into a standard investment loan.

What Happens When the Build Is Complete

Once construction reaches practical completion and you've received the final inspection report, the lender converts the construction loan into a standard investment loan with principal and interest repayments. At that point, you'll also need to organise an occupancy certificate from the council, building insurance, and landlord insurance before you can lease the property.

Most lenders will automatically roll the construction loan into their standard variable rate unless you've requested a fixed rate at the outset. If you've been on a construction loan interest rate that was higher than the lender's standard variable, your rate should drop once the loan converts. If it doesn't, you've been moved onto the wrong product, and you'll need to contact the lender or your broker to have it corrected.

The conversion also triggers a revaluation in some cases, particularly if the lender wants to confirm that the completed property is worth what they expected. If the valuation comes in lower than the contract price plus land cost, you might find yourself with a loan-to-value ratio that's higher than the lender's policy allows, which can limit your ability to access equity or require you to pay lender's mortgage insurance.

Building an investment property through construction finance gives you control over the design, the ability to maximise depreciation, and the opportunity to create something that suits the local rental market rather than settling for what's already available. The process involves more documentation, stricter lender requirements, and a longer timeline than buying established, but the returns can justify the effort if you structure it correctly and choose a builder and location that align with tenant demand.

Call one of our team or book an appointment at a time that works for you, and we'll walk through your project, your borrowing capacity, and which lenders are likely to support your build without forcing you into a product that doesn't fit your goals.

Frequently Asked Questions