Everything You Need to Know About Custom Home Finance

What Makes Financing a Custom Home Different From Buying Established Property

When you purchase land and build a custom home, you need construction finance rather than a standard home loan. Construction loans release funds progressively as your build reaches specific stages, and you only pay interest on the amount drawn down at each point. This differs from a standard loan where the full amount is advanced at settlement.

The lender assesses both your ability to service the loan and the viability of your building project. That means reviewing your income, deposit, and existing debts alongside your building contract, council-approved plans, and the builder's credentials. In Noranda, where a mix of established homes and new builds sit within the City of Baxley, most lenders will require a registered builder working under a fixed price building contract before they approve funding.

Consider a buyer purchasing vacant land near Morley Drive with plans to engage a custom builder. The land settles first using a portion of the approved loan. Once the building contract is signed and council approval is granted, the construction phase begins. The lender releases funds at predetermined milestones such as base stage, frame stage, lock-up, and practical completion. Each release is triggered by a progress inspection conducted by the lender's valuer, and the builder invoices for work completed at each stage according to the progress payment schedule.

How the Progressive Drawdown Structure Works

Funds are released in instalments that align with your building contract. Most lenders use a five or six-stage drawdown, though some builders prefer different structures. Each drawdown is subject to a progress inspection to confirm the stage has been completed to the required standard. The lender pays the builder directly, and you begin paying interest on the cumulative amount drawn down.

Between drawdowns, you're typically on interest-only repayments, which keeps your costs lower while the build is underway. Once construction reaches practical completion and you receive the occupancy certificate, the loan converts to a standard principal and interest home loan. Some lenders call this a construction to permanent loan because it transitions automatically without needing to refinance.

Most lenders charge a Progressive Drawing Fee for each inspection and drawdown, usually between $150 and $400 per stage. These fees are either paid upfront or capitalised into the loan. If your builder requests payment outside the agreed schedule or asks for funds before a stage is completed, contact your broker before proceeding. Paying ahead of schedule can create complications if the build stalls or if the lender's valuer disagrees with the stage completion.

What Lenders Assess Before Approving Construction Finance

Lenders evaluate the building contract, the builder's licensing and insurance, council-approved plans, and your capacity to service the loan once construction is complete. The builder must be registered, and the contract must include a fixed price with a clear progress payment schedule. Cost plus contracts, where the final price isn't confirmed upfront, are difficult to finance through most mainstream lenders.

Your deposit requirement is generally higher than for an established property purchase. Most lenders require a 10% to 20% deposit, calculated on the combined land and construction cost. Lenders mortgage insurance may apply if your deposit is below 20%, and the premium is calculated on the total loan amount, not just the land portion.

In a scenario where a buyer in Noranda purchases land for $250,000 and signs a building contract for $400,000, the total project cost is $650,000. With a 10% deposit of $65,000, the buyer borrows $585,000. The lender assesses serviceability based on principal and interest repayments on the full $585,000, even though interest during construction is charged only on progressive drawdowns. If your income or existing debts limit your borrowing capacity, this can affect approval even if you can comfortably manage the interest-only payments during the build.

Fixed Price Contracts and Why They Matter for Approval

A fixed price building contract locks in the total construction cost and protects you from cost overruns during the build. Lenders prefer fixed price contracts because they know the maximum exposure at the outset. If your builder uses a cost plus structure, where the final price adjusts based on materials and labour, most lenders will decline the application or require a larger cash buffer to cover potential variations.

The contract should specify a start date and expected completion timeframe. Some lenders require that you commence building within a set period from the loan disclosure date, often six months. If council approval or site works delay the start, you may need to request an extension from the lender. Delays beyond 12 months can trigger a full reassessment, particularly if interest rates or your financial circumstances have changed.

Your builder should provide a detailed progress payment schedule that matches the lender's drawdown stages. Misalignment between the two can cause payment delays and frustration on site. If your builder operates on seven stages but your lender funds in five, either the builder adjusts their invoicing or you cover the gap from your own funds between drawdowns. Clarifying this before contracts are signed prevents issues once construction begins. For more detail on construction loan options, including how different lenders structure their drawdown schedules, speak with a broker familiar with local builders.

Interest Charges During Construction and How They're Calculated

During construction, interest is charged only on the amount drawn down, not the total approved loan. If $100,000 has been released to cover land purchase and base stage, you pay interest on $100,000. Once the next $80,000 is drawn for frame stage, interest applies to $180,000, and so on. This keeps your repayments lower while the build progresses, but it also means your repayments increase with each drawdown.

Most lenders offer interest-only repayment options during the construction phase, converting to principal and interest once the build is complete. Some buyers prefer to make additional payments during construction to reduce the balance before the loan converts, but this depends on whether your loan structure allows extra repayments without penalty.

If your build takes longer than expected, you continue paying interest on the drawn amount for the extended period. Delays caused by weather, material shortages, or council inspections are common, and while they don't usually affect your loan terms, they do extend the time you're paying interest without living in the property. Planning for a buffer of three to six months beyond the builder's estimated completion date helps manage cashflow during this period.

Owner Builder Finance and Why It's Harder to Secure

If you're planning to act as an owner builder, arranging finance becomes significantly more difficult. Most mainstream lenders will not provide owner builder finance because the risk of cost overruns, delays, and incomplete work is higher without a registered builder managing the project. The few lenders who do offer owner builder loans require extensive documentation, including detailed costings, proof of trade qualifications or experience, and a higher deposit, often 30% or more.

Owner builders also need to manage progress payments to subcontractors, including plumbers, electricians, and concreters, and provide evidence to the lender that each stage has been completed to standard. Without a head builder managing the schedule, the administrative burden falls entirely on you. For buyers in Noranda considering an owner builder route, it's worth speaking with a mortgage broker in Noranda who can identify which lenders will consider the application and what documentation is required upfront.

Land and Construction Packages Versus Separate Purchases

Some buyers purchase land and building as a package from a developer or project home builder, while others buy land independently and engage a custom builder later. Both approaches work with construction finance, but the structure differs slightly.

With a land and construction package, the developer often has existing relationships with lenders, and the approval process can be more straightforward because the builder, plans, and costings are already in place. The downside is less flexibility in design and builder choice.

When you purchase land separately, you have full control over the builder and design, but you need to move through the approval and contract process independently. In Noranda, where suitable land is available in pockets near Crimea Street and the light industrial precinct, buyers often secure land first and spend several months working with a builder and draftsperson on custom plans before applying for construction finance. This approach allows for a more tailored home but requires patience and coordination across council, builder, and lender timelines. For buyers weighing up whether to purchase established or build new, reviewing your borrowing capacity early in the process helps set realistic expectations around budget and loan serviceability.

When Renovation Finance Might Be a Better Option

If you're considering buying an older property in Noranda and renovating rather than building from scratch, renovation finance works similarly to construction loans but with some key differences. The property is already habitable, so you can often live in it during works, and the loan is structured around the renovation scope rather than a full build.

Renovation loans release funds progressively based on stages such as demolition, structural work, and fit-out. You still need detailed quotes, council approval where required, and a registered builder if the scope is substantial. The benefit is that you're improving an existing asset rather than waiting 12 months for a new build to complete. For more information on how renovation funding is structured, see home loans for details on how lenders assess renovation projects alongside standard purchase finance.

A buyer might purchase a 1970s brick and tile home near Walter Padbury Park with plans to extend and modernise. The purchase is funded through a standard loan, and the renovation component is structured as a separate facility or a construction top-up. The lender values the property in its current state and again on an 'as if complete' basis, lending against the improved value.

What Happens if Your Build Goes Over Budget or Over Time

If construction costs exceed the contracted price due to variations or unforeseen site works, you'll need to cover the additional amount from your own funds unless your loan has a built-in buffer. Most lenders will not increase the loan mid-construction unless the property's value has increased enough to support the higher borrowing.

If your builder becomes insolvent or abandons the project, your lender will freeze further drawdowns and require you to appoint a new builder to complete the work. Builders warranty insurance, which is mandatory in Western Australia for residential projects over $20,000, provides some financial protection in these situations, but it doesn't cover poor workmanship or non-structural defects.

Time delays are more common than cost blowouts. If your build extends beyond 12 months, your lender may require a revaluation or an update on your financial circumstances, particularly if your employment or income has changed. Keeping open communication with your broker during construction helps address issues before they affect your loan.

Call one of our team or book an appointment at a time that works for you to discuss your custom home project and how construction finance can be structured to suit your build timeline and budget.

Frequently Asked Questions