Do you know how construction loan features work?

Construction finance operates differently from standard home loans because you're funding something that doesn't exist yet. You pay only for what's been built, which means the loan amount increases as your home takes shape.

Ashgrove's established character and elevated position make it attractive for knock-down rebuilds and custom builds on the suburb's larger blocks, particularly in the streets closer to Waterworks Road and around the Ashgrove Golf Club precinct. Understanding how construction loan features work becomes critical when you're committing to a build that might span eight to twelve months in a suburb where council approval processes and bushfire overlay zones can add complexity to your timeline.

You only pay interest on what's been drawn

With a construction loan, interest charges apply only to the portion of funds released to your builder. If you've borrowed $600,000 but only $150,000 has been paid out for slab and frame, you're charged interest on $150,000, not the full loan amount.

Consider a scenario where you're building a 280-square-metre home in Ashgrove. After the slab stage, your builder invoices for $120,000. The lender conducts a progress inspection to verify completion, then releases funds. You start paying interest on that $120,000 immediately, but the remaining loan balance sits untouched. By lockup stage, another $180,000 might be drawn, bringing your total to $300,000. Interest is now calculated on $300,000 while the remaining $300,000 stays dormant until later stages. This structure reduces your holding costs during the build compared to borrowing the full amount upfront.

Progressive drawdown schedules are tied to building stages

Funds are released in instalments based on your progress payment schedule, which is determined by your building contract. Most fixed price building contracts divide payments across five or six stages: base, frame, lockup, fixing, practical completion, and final.

Your lender arranges a progress inspection at each stage before releasing funds. The inspector verifies that work matches the invoice amount, checking that frame construction is complete before approving that drawdown, for instance. Some lenders charge a Progressive Drawing Fee for each inspection, typically between $200 and $400 per stage. Over six stages, that's $1,200 to $2,400 in additional costs that need to be factored into your build budget alongside council approval fees and any variations.

In Ashgrove, where many builds involve demolition of post-war homes and construction on sloping sites, your payment schedule needs to account for site-specific work like retaining walls or stormwater management that might trigger additional progress claims outside the standard stages. A cost plus contract, where you pay actual costs plus a builder's margin, requires more detailed documentation at each drawdown because there's no fixed price to reference.

Interest-only repayments keep costs manageable during the build

Most construction loans offer interest-only repayment options during the construction phase. You're not required to pay down the principal until the build is complete and the loan converts to a standard mortgage.

This feature matters because your cash flow during construction is already stretched. You might still be paying rent or covering costs on your existing property while funding the build. Interest-only repayments on $300,000 drawn at current variable rates might sit around $1,500 per month, compared to principal and interest repayments closer to $2,100. That $600 difference per month across an eight-month build is $4,800 in breathing room when you're also managing settlement costs, temporary accommodation, or unexpected variations.

Once construction reaches practical completion, the loan typically converts to principal and interest repayments automatically, though some lenders allow you to extend the interest-only period if your financial situation requires it. Understanding this conversion point is important for budgeting, particularly if you're coordinating the sale of another property or managing a transition from renting.

Fixed price contracts provide certainty for lender and borrower

Lenders strongly prefer fixed price building contracts because they know exactly what they're funding. A contract that specifies $580,000 for a defined scope of work gives the lender confidence that the project won't blow out and leave you unable to complete the build.

Without a fixed price contract, many lenders won't approve construction finance at all. If you're working with a cost plus arrangement or building as an owner builder, your options narrow significantly. Owner builder finance is available, but expect higher interest rates, lower loan-to-value ratios, and more stringent documentation requirements because the lender is taking on additional risk. You'll need to demonstrate construction experience, provide detailed quotes from sub-contractors, and often accept a smaller loan amount relative to the project value.

In our experience, clients underestimate how much easier the approval process becomes with a registered builder and a fixed price contract in hand. The lender's valuer can assess the completed value based on the plans and contract price, which streamlines the application compared to a scenario where costs are uncertain.

You'll need to commence building within a set timeframe

Most construction loan approvals require you to start building within six to twelve months from the disclosure date. Miss that window, and your approval may lapse, forcing you to reapply and potentially face different interest rates or lending criteria.

This clause exists because lenders assess your borrowing capacity based on current income, expenses, and market conditions. If twelve months pass, your financial situation might have changed, or the lender's appetite for construction lending might have shifted. Development applications and council plans can take months in Ashgrove, particularly if your site falls within a character housing precinct or requires design adjustments to meet local planning overlays. Submitting your DA early and having a builder ready to start once council approval comes through keeps you within the lender's commencement window.

Land and construction packages, common with project home builders, often include conditional approval that assumes you'll settle on the land and start building in quick succession. If you're buying suitable land separately and building later, you might need a land and build loan with separate settlement for the land purchase and a deferred construction start, which requires careful structuring with your broker.

Conversion to a standard home loan happens automatically

Once your builder reaches practical completion and you receive your occupancy certificate, the construction loan converts to a standard principal and interest mortgage. The lender conducts a final valuation to confirm the property's completed value matches their initial assessment.

At this point, your construction loan interest rate, which may have been slightly higher than a standard variable rate, typically reverts to the lender's usual home loan rate. Some lenders offer a construction to permanent loan where the same rate applies throughout, while others charge a margin during construction that drops away after conversion. Understanding which structure applies to your loan affects your total interest cost over the life of the build.

If you've been making interest-only payments on drawn amounts during construction, your repayment will increase once conversion happens because you're now paying principal and interest on the full loan amount over the remaining loan term. Planning for this jump in repayments before you start building prevents cash flow surprises when you're moving into your new home and managing connection costs for utilities and other settling-in expenses.

Variations and additional progress payments require lender approval

If you decide mid-build to upgrade fixtures, add a deck, or make changes that increase the contract price, those variations need to be documented and approved by the lender before additional funds are released. The lender will reassess whether the higher contract price still aligns with the property's expected value and your borrowing capacity.

Variations that push the total cost beyond the approved loan amount mean you'll need to cover the difference from your own funds, or apply for a loan top-up. Top-ups aren't guaranteed, particularly if your financial situation has changed or if the lender's valuer doesn't believe the variation adds equivalent value to the property. A $20,000 upgrade to stone benchtops might not lift the completed valuation by $20,000, leaving you to fund part of that cost without additional borrowing.

This is where having a buffer in your budget becomes important. Clients building in Ashgrove often encounter unexpected costs related to site conditions, like additional earthworks on sloping blocks or upgraded stormwater systems required by council. If your loan is already at the maximum loan-to-value ratio, those costs come out of your savings unless you've planned for contingency.

Call one of our team or book an appointment at a time that works for you. We'll walk through your building plans, contract structure, and funding options to set up a construction loan that fits your build timeline and budget.

Frequently Asked Questions