When to Use a Construction Loan for Your New Home

A construction loan releases funds in stages as your home is built, not all at once like a standard home loan. You pay interest only on what's been drawn down, and once construction finishes, the loan typically converts to a standard home loan with principal and interest repayments.

For families in Montrose looking to build among the established gum trees and acreage blocks along Mount Dandenong Tourist Road or in the newer subdivisions closer to Manchester Road, this type of finance makes a custom-designed home possible without needing the full loan amount sitting idle from day one.

What Lenders Actually Approve Before You Start Building

Lenders want to see a fixed price building contract with a registered builder, council approval in place, and enough deposit to cover both the land and the build. Most require at least 10% of the total project cost as genuine savings, though some lenders will accept 5% if you meet their criteria.

Consider a buyer who already owns a sloping block in Montrose and wants to build a split-level home designed around the terrain. The land is valued at $420,000, and the build quote comes in at $580,000. The total project cost is $1,000,000. With a 10% deposit, they need $100,000 in savings, plus another $25,000 to $30,000 for settlement costs, stamp duty on the land if applicable, and initial fees. The lender approves the loan based on the contract price, the builder's credentials, and the completed council plans. Without a fixed price contract, most lenders won't proceed, because the risk of cost blowouts is too high.

How the Progressive Drawdown Actually Works

Funds are released at specific stages of construction, usually five or six draws tied to milestones like slab down, frame up, lockup, fixing, and completion. Each draw requires a progress inspection by the lender's valuer, and you only pay interest on the amount released so far.

If $150,000 is drawn for the slab and base stage, interest accrues only on that portion until the next stage is completed and the next draw is approved. During construction, most borrowers make interest-only repayments, which keeps costs lower while the build is underway. Once the final draw is released and you move in, the loan converts to a standard home loan with regular principal and interest repayments. Lenders typically charge a progressive drawing fee, often around $300 to $500 per inspection, which covers the cost of sending a valuer to site at each stage.

Land and Construction Package vs Buying Land First

Some buyers purchase land and arrange construction finance later. Others use a land and construction package where both are financed together from the start. The difference comes down to timing and how long you can wait between buying the land and starting the build.

Most lenders require you to commence building within a set period from the date you settle on the land, usually six to twelve months. If you settle on a block in Montrose and then spend eighteen months finalising plans and getting council approval, you may need to refinance the land loan into a construction facility later, which adds another round of application costs and paperwork. If you know your builder and have your plans ready, financing both together from the outset often makes more sense. The land is purchased, the construction loan sits ready, and draws begin as soon as the builder breaks ground.

Owner Builder Finance and Why It's Harder to Secure

If you're planning to manage the build yourself as an owner builder, expect fewer lenders to support the project. Owner builder finance is considered higher risk because there's no registered builder guaranteeing the work or carrying insurance for defects.

Lenders who do offer owner builder finance usually require a larger deposit, often 20% or more, and may ask for detailed costings, quotes from every subcontractor, and evidence that you have the skills or experience to manage the project. Progress inspections are stricter, and if the build stalls or runs over budget, the lender may halt further draws until issues are resolved. In our experience, most owner builder projects in areas like Montrose involve buyers with trade backgrounds or those renovating an existing home rather than building from scratch. If you don't have that background, using a registered builder under a fixed price contract will give you access to far more construction loan options and lower deposit requirements.

Renovation Finance for Extending or Rebuilding on Your Block

If you already own a home in Montrose and want to knock it down and rebuild, or undertake a major extension, you can use construction finance for that too. The existing property acts as security, and the loan amount is based on the projected value once the work is complete.

Lenders will want a valuation of the current property, a fixed price contract for the renovation or rebuild, and council approval for the works. If the existing home is worth $650,000 and the rebuild will cost $400,000, the lender assesses the loan against the projected end value, say $1,050,000. You may be able to borrow up to 80% of that end value, which is $840,000. If you owe $300,000 on your current mortgage, you have access to $540,000 in additional funds to cover the rebuild. Draws are released progressively, just like a new build, and you continue living elsewhere or in a temporary setup during construction.

Fixed Price Contracts and What Happens When Costs Blow Out

A fixed price building contract locks in the build cost, and the builder wears any cost increases for the items covered in that contract. The lender relies on that fixed price when approving your loan, so if the builder tries to add variations or unexpected charges, you need to be clear about what's covered and what's not.

Variations for changes you request, like upgrading benchtops or adding a deck, are not covered by the fixed price and need to be funded separately. If the variation adds $20,000 to the project, you either pay that out of pocket or apply to increase the loan, which may require another assessment and approval. Some buyers assume the lender will just release more funds if the build runs over budget, but that's not how it works. The loan is approved based on the contract price and the end valuation. If costs blow out due to builder errors or poor planning, that's a dispute between you and the builder, not something the lender will automatically cover.

Interest Rate Options During and After Construction

During the construction phase, most lenders offer variable rates, and some allow you to lock in a fixed rate once the loan converts to a standard home loan after completion. Interest-only repayment options are common during the build, which reduces your monthly costs while funds are being drawn.

Once construction finishes and the final draw is released, the loan converts and you begin making principal and interest repayments at the rate you've chosen. If you want certainty, you can lock in a portion of the loan on a fixed rate at that point, though you'll want to weigh that against the flexibility of a variable rate if you plan to make additional payments or pay the loan down faster. Some buyers in Montrose who are building while still renting elsewhere prefer interest-only repayments during construction to keep costs low, then switch to principal and interest once they move in and their rental expense stops. That's a conversation worth having before you sign the loan documents, not halfway through the build.

Council Approval and Development Application Timing

You can't draw down construction funds until council approval is in place. Some buyers apply for finance before their plans are approved, but the lender won't issue a formal approval or allow any draws until that council sign-off is confirmed.

In Montrose, where many blocks are on slopes or in bushfire-prone areas, council plans can take longer to approve due to additional requirements around site access, bushfire attack level ratings, and native vegetation overlays. If your development application is still with council and you're pushing to lock in a builder, be aware that your finance approval may lapse if the build doesn't start within the lender's required timeframe. Most lenders give you six months from formal approval to settle on land and begin construction. If council takes four months to approve your plans, that leaves you two months to finalise the contract and break ground, which can be tight.

When to Talk to a Broker About Your Build

Before you sign a building contract or put down a deposit on land, talk to a mortgage broker in Montrose who works with construction finance regularly. Lenders have different policies on progress payment schedules, owner builder projects, and how they handle cost-plus contracts versus fixed price builds.

Some lenders are set up well for land and build loans, while others are difficult to deal with once construction starts. Knowing which lender suits your build type, your deposit size, and your timeline means you're not stuck halfway through a project with a lender who won't release the next draw because of a minor paperwork issue. We regularly see buyers who've signed contracts based on what a lender's online calculator told them they could borrow, only to find out later that the lender doesn't actually support their specific build scenario. Getting that clarity early means you can move forward with confidence, not hope.

Building a home in Montrose gives you the chance to design something that suits the land, the outlook, and the way you actually live. Getting the finance structure right from the start means you can focus on the build itself, not on scrambling for funds or renegotiating terms when you're halfway through. Call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions