Knockdown Rebuild Loans: What Not to Do

A knockdown rebuild isn't a standard home purchase, and it won't fund like one either.

You're buying a property with an existing dwelling, demolishing it, and building a new house on the same block. That means your lender needs to cover the land purchase, the demolition, and the construction in stages. Most FIFO workers assume their income will be the main hurdle, but the real friction comes from timing, valuation gaps, and how much cash you need up front before the first slab goes down.

Why Lenders Treat Knockdown Rebuilds Differently

Lenders don't lend against what you're planning to build until it exists. When you buy a knockdown rebuild, the property you settle on is worth whatever the land is worth, not the finished home. If the existing dwelling adds value, that might help, but most knockdown candidates are old, tired, or structurally compromised. That means your loan-to-value ratio at settlement is based on land value alone, and you'll need enough deposit to cover that plus all the upfront costs before construction starts.

Consider a FIFO worker buying a tired 1960s weatherboard in Kallangur for the land value. The contract price is at the suburb's current median, but the existing dwelling is getting demolished within weeks of settlement. The lender values the land only, which comes in lower than the purchase price. That gap has to be covered by a larger deposit, and the construction portion won't release until the registered builder provides a fixed price building contract and the council signs off on the plans.

What You'll Need Before Settlement

You can't start a knockdown rebuild application with just a deposit. Lenders want proof that the construction side is locked in before they'll approve the full loan amount.

That means a fixed price building contract with a registered builder, council-approved plans, and a progress payment schedule that matches how the lender releases funds. You'll also need a demolition quote, a site works estimate, and enough cash to cover the land deposit, stamp duty, legals, and any valuation shortfall. If you're relying on a low deposit loan or an LMI waiver, the land-only valuation at settlement can push your LVR higher than expected, and some lenders won't proceed without a top-up.

In our experience, FIFO workers often underestimate how much needs to be in place before the loan even gets to credit. The construction loan doesn't just sit there waiting for you to pick a builder. The builder, the plans, and the council approval all need to be ready before the lender will issue full approval.

How the Progressive Drawdown Works

Once you settle on the land, the construction portion sits untouched until the build starts. Lenders only release funds at set stages, usually after a progress inspection confirms the work is complete. A typical progress payment schedule might release funds at slab down, frame up, lockup, fixing, and practical completion. The builder invoices, the lender sends an inspector, and if the stage is signed off, the funds go to the builder.

You'll be charged interest only on the amount drawn down, not the full construction loan. That keeps repayments lower during the build, but it also means your loan balance grows in chunks, not gradually. Each drawdown triggers a Progressive Drawing Fee, which is usually a few hundred dollars per inspection. Some lenders charge this upfront, others add it to the loan.

What Happens Between Settlement and the First Drawdown

This is where knockdown rebuilds get expensive. You settle on the land, you own it, but nothing is happening yet. The demolition needs to happen, the site needs to be cleared, and council might require additional work before the builder can start. All of that costs money, and it usually happens before the first construction drawdown is available.

Some lenders will include a demolition allowance in the first drawdown, but others expect you to fund it separately. If your contract says you need to commence building within a set period from the disclosure date, you'll need to move quickly or risk the builder walking. FIFO rosters don't always align with builder timelines, so you'll want someone on the ground who can coordinate inspections, sign-offs, and contractor access while you're away.

The Valuation Gap That Catches People

The completed valuation is what the property will be worth once the build is finished. The land valuation is what it's worth now. Lenders use the lower of the two to set your loan-to-value ratio during construction, and if the completed valuation comes in under the combined cost of land and build, you'll need to cover the gap in cash.

This happens more often than it should. A FIFO electrician buying in Morayfield might pay close to median for a knockdown block, then sign a building contract for a four-bedroom custom design. The total cost is higher than the bank's completed valuation because the build includes upgrades that don't add dollar-for-dollar value in that street. The shortfall has to be funded upfront, which can mean delaying the build or scaling back the inclusions.

FIFO Income and Construction Loan Approvals

Most lenders will assess your FIFO income the same way they would for a standard home loan, but construction loans add another layer. You're not just servicing a mortgage, you're also managing a build. That means some lenders want to see a larger cash buffer or a higher income threshold before they'll approve a construction facility on a FIFO wage.

If you're applying as an owner builder, expect even more scrutiny. Owner builder finance is harder to get, and most mainstream lenders won't touch it. You'll need proven construction experience, detailed costings, and a much larger deposit. For most FIFO workers, using a registered builder under a fixed price contract is the only realistic path.

Fixed Price Contracts vs Cost Plus

A fixed price building contract locks in the total cost before construction starts. The builder agrees to deliver the finished home for a set price, and any cost overruns are their problem. A cost plus contract charges you the actual cost of materials and labour, plus a margin. Lenders strongly prefer fixed price contracts because they know exactly how much they're lending and when each stage will cost.

If your builder is offering cost plus, expect your loan options to shrink. Some lenders won't fund cost plus contracts at all, and those that do will usually require a much larger contingency buffer. For a FIFO worker trying to keep upfront costs down, a fixed price contract is the only way to make the numbers work without burning through your entire offset account before the frame goes up.

Construction finance for a knockdown rebuild isn't something you can lock in over a swing. You'll need the building contract, the council approval, and a clear picture of what sits between settlement and slab down. Call one of our team or book an appointment at a time that works for you.

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