Building an investment property from scratch gives you control over layout, finish quality, and depreciation schedules that older stock can't match.
The funding structure is different to a standard purchase loan. Instead of one lump sum at settlement, construction finance releases money in stages as the build progresses. Each drawdown triggers interest charges only on what's been released, not the total loan amount. That staged approach affects cash flow, deposit requirements, and how lenders assess your income, particularly if you're rostered FIFO and already servicing a primary residence.
How Construction Finance Releases Funds
Lenders release funds in instalments tied to building milestones, not calendar dates. A typical progress payment schedule includes slab pour, frame up, lock-up, fixing stage, and practical completion. The builder invoices at each stage, a quantity surveyor or bank valuer inspects the work, and the lender releases the next tranche once satisfied the stage is finished. You only pay interest on the amount drawn down, so if $150,000 has been released from a $400,000 facility, interest applies to $150,000 until the next drawdown.
Most lenders charge a Progressive Drawing Fee each time they release funds, usually between $150 and $400 per drawdown. That adds up across five or six stages, so factor another $1,500 to $2,000 into your upfront costs alongside council approval fees and the development application.
Fixed Price Building Contract or Cost Plus
A fixed price building contract sets a total build cost agreed before you start. The builder absorbs cost overruns, and the lender knows exactly how much to approve. Cost plus contracts charge actual costs plus a builder's margin, which can shift during the build if materials or labour move. Lenders prefer fixed price contracts for investment builds because the loan amount stays predictable. If you're using a registered builder and council plans are already approved, most lenders will work from the fixed price contract without needing a second valuation mid-build.
In our experience, mobile plant operators with strong savings and clear FIFO income find it easier to get approved on a fixed price contract than trying to explain cost plus variations to a credit assessor who doesn't know the building industry.
Interest-Only Repayment Options During Construction
During the build phase, most lenders offer interest-only repayment options on the amount drawn down. You're not making principal and interest payments on the full loan until construction finishes and the loan converts to a standard investment mortgage. That keeps cash flow manageable while you're still covering rent or a mortgage on your primary residence. Once the build reaches practical completion, the loan converts automatically to principal and interest unless you've structured it to stay interest-only for investment purposes.
Consider a mobile plant operator building a three-bedroom investment property while renting closer to the airport. During the eight-month build, drawdowns total $320,000 across five stages. Interest charges average around $1,100 per month by the final stage, compared to roughly $2,200 per month if the full loan amount was drawn from day one. That $1,100 difference covers part of the rent on the current place without stretching serviceability.
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Land and Construction Package Versus Buying Land First
A land and construction package bundles the land purchase and build contract from the same developer. The lender treats it as one loan with two settlement dates: one when the land title transfers, one when the build finishes. You start paying interest on the land portion immediately, even if construction hasn't started. Some contracts require you to commence building within a set period from the Disclosure Date, usually six to twelve months, or the package lapses.
Buying suitable land separately gives you time to find the right block and builder without a countdown, but it means two separate valuations, two sets of legals, and potentially two loan applications if the land purchase exhausts your borrowing capacity before the build starts. For FIFO workers with lumpy income or complex rosters, consolidating everything into one construction loan application keeps the process contained and the serviceability assessment consistent.
How Lenders Assess FIFO Income for Construction Loans
Lenders assess construction loans the same way they assess any investment loan, but they also want to see that you can service interest payments during the build and after rental income starts. If you're already paying a mortgage on an owner-occupied property, the lender adds construction interest to your existing commitments and tests whether your FIFO income covers both. Allowances, penalties, and overtime count if they're consistent across your last two years of tax returns or recent payslips, but if your roster just changed or you've moved sites, some lenders will shade those loadings.
Mobile plant operators often have clean income records because the work is steady and the hourly rates are transparent. If your payslips show regular allowances and your tax returns confirm them, most lenders will include 80 to 100 percent of that income when calculating how much you can borrow. The construction element doesn't change that assessment, it just adds another layer of documentation around the building contract and progress payment schedule.
Deposit and Genuine Savings for Construction Investment Loans
Most lenders want a 20 percent deposit to avoid Lenders Mortgage Insurance on an investment build. That deposit applies to the combined land and construction cost, not just the land. Some lenders will consider 10 percent if you're an existing customer with a strong repayment history, but LMI on investment construction loans is more restrictive than owner-occupied equivalents. If you've built equity in your primary residence, you might use that equity as part of the deposit rather than liquidating savings, particularly if you want to keep cash aside for any build variations or settlement costs.
Genuine savings still matter. Lenders expect to see at least five percent of the total loan amount held in your account for three months or longer. Sale proceeds from another property, inheritance, or a work bonus can sometimes substitute, but the assessor will want a paper trail showing where it came from and how long you've held it.
Owner Builder Finance and Why Most Lenders Won't Touch It
Owner builder finance is rare for investment properties because lenders see the risk as too high. If you're managing subcontractors, ordering materials, and coordinating inspections while working a two-week-on roster, the chance of cost blowouts or incomplete stages increases. Even if you've got trade tickets or site experience, most lenders won't approve construction funding unless a licensed builder holds the head contract. A handful of smaller lenders will consider owner builder applications if you've built before and can show detailed costings, but the interest rate usually sits 0.5 to 1 percent higher than a standard construction loan with a registered builder.
If you're set on managing the build yourself, expect to put down 30 percent or more and accept that your borrowing capacity will be shaded because the lender's risk appetite is lower.
Conversion to Permanent Loan and Rental Income
Once the build reaches practical completion and you've got an occupancy certificate, the construction loan converts to a standard investment mortgage. The lender will revalue the finished property to confirm it matches or exceeds the total loan amount, then switch the loan to principal and interest or interest-only depending on how you've structured it. Rental income from that point reduces the net cost of holding the property, and most lenders will include 80 percent of the assessed rent when calculating ongoing serviceability if you're planning another purchase down the line.
New builds offer higher depreciation deductions than established properties because you can claim the full cost of plant and equipment items like air conditioning, hot water systems, and floor coverings. That depreciation doesn't reduce your loan balance, but it lowers your taxable income and improves cash flow, which matters when you're holding an investment property on a FIFO roster with variable overtime.
Why Custom Design Investment Builds Are Less Common
Custom design builds for investment properties are uncommon because the extra cost rarely translates to higher rent. Tenants pay for location, bedroom count, and condition, not bespoke joinery or architectural features. Most construction investment loans fund project homes or spec home builds with standard floor plans and inclusions that keep costs predictable and resale appeal broad. If you're building in an area with strong rental demand, a three-bedroom project home with a double garage and a functional layout will lease faster and hold value better than a custom design that overshoots the street.
That said, if you're building in a regional hub near a mine site and you know the rental market will pay for four bedrooms and extra parking because contractors and supervisors want space for vehicles and storage, a semi-custom design might justify the cost. Just make sure the building loan amount doesn't push your loan-to-value ratio above 80 percent, or you'll be paying LMI on a property that might not appraise higher than a standard build.
When Renovation Finance Makes More Sense Than New Construction
Sometimes buying an established investment property and funding improvements through a house renovation loan delivers better returns than a ground-up build. Renovation finance lets you add value through extensions, kitchen upgrades, or reconfiguring floor plans without the long lead time of council approval and construction draw schedules. If you're crunched for time between rosters and you want rental income flowing sooner, an established property with a renovation component might suit your situation better than waiting eight months for a build to complete.
Construction loans work when you want control over the finished product and you've got the deposit and income to carry the build phase. Renovation finance works when you want to capture value quickly in a suburb where land supply is tight and established stock is underimproved. Both strategies fit FIFO income, it just depends on your timeline and how much cash flow you're comfortable managing during the works.
Call one of our team or book an appointment at a time that works for you. We'll walk through the construction draw schedule, how your FIFO income stacks up, and whether a land and build loan fits your deposit and timeline better than other options.
Frequently Asked Questions
How does interest work during a construction loan?
You only pay interest on the amount drawn down at each building stage, not the total loan amount. Once the build reaches practical completion, the loan converts to a standard investment mortgage with principal and interest or interest-only repayments.
What deposit do I need for a construction investment loan?
Most lenders want 20 percent of the combined land and construction cost to avoid Lenders Mortgage Insurance. Some will consider 10 percent if you're an existing customer, but LMI on investment construction loans is more restrictive than owner-occupied equivalents.
Can I use a cost plus contract for an investment build?
Lenders prefer fixed price building contracts because the loan amount stays predictable. Cost plus contracts can shift during the build, which makes credit approval harder and may limit your borrowing capacity.
Will lenders approve owner builder finance for an investment property?
Most lenders won't approve construction funding for investment properties unless a licensed builder holds the head contract. A handful of smaller lenders will consider owner builder applications, but expect a higher deposit and interest rate.
How do lenders assess FIFO income for construction loans?
Lenders assess construction loans the same way they assess any investment loan, but they test whether your FIFO income can service interest payments during the build and after rental income starts. Allowances and overtime count if they're consistent across your tax returns or recent payslips.
