Investment Property Types and How They Affect Your Loan

The property type you choose for your investment will shape your loan options more than most other factors.

Lenders assess risk differently across property types, which directly affects your deposit requirements, interest rates, and how much rental income they'll accept in your borrowing calculations. A studio apartment in Adelaide's CBD will face tighter lending conditions than a three-bedroom house in Salisbury Downs, even if both properties cost the same amount. Understanding these differences before you start looking helps you target the right property for your circumstances.

Established Houses and Lender Appetite

Established houses typically receive the most favourable lending treatment. Lenders view them as lower risk because they have established value, proven rental demand, and broader resale appeal if things go wrong.

For a public sector employee purchasing a three-bedroom house in Modbury as an investment property, most lenders will accept up to 80% of the loan to value ratio without Lenders Mortgage Insurance. They'll also use the full rental income in serviceability calculations, assuming the property shows a vacancy rate under 3%. This matters when you're trying to maximise your borrowing capacity while maintaining your current living arrangements. The same borrower looking at a one-bedroom apartment might find lenders will only recognise 70-80% of the rental income, even if the advertised rent is higher per square metre.

Units and Apartments Under 50 Square Metres

Property size creates a distinct lending threshold at 50 square metres. Units or apartments below this size often fall into a higher risk category for lenders, which translates to stricter conditions on your investment loan.

Consider a scenario where you're looking at a 45-square-metre apartment near the Adelaide Showgrounds precinct. The property offers strong rental yield and sits close to public transport. Despite these positives, many lenders will cap your borrowing at 70% loan to value ratio, require a larger deposit, and apply a higher interest rate compared to a 65-square-metre unit in the same building. Some lenders won't consider properties under 50 square metres at all. This affects your deposit needs and overall borrowing capacity, so knowing this threshold before you inspect properties prevents wasted time on properties you can't finance on reasonable terms.

Off-the-Plan Purchases and Valuation Risk

Buying an investment property off-the-plan introduces valuation timing issues that established properties don't carry. Lenders will assess your loan application based on the purchase price, but they'll order a valuation at settlement, which might be 12 to 24 months later.

If the market softens or the area sees an oversupply of similar apartments, the valuation at settlement might come in below your contract price. In our experience with public sector employees, this creates two problems. First, you might need to increase your deposit at settlement to meet the agreed loan to value ratio. Second, if you were relying on an LMI waiver available to government employees, a lower valuation could push you above the 80% threshold and trigger insurance costs you hadn't budgeted for. The property investment strategy needs to account for this valuation risk, particularly in areas like Mawson Lakes where multiple developments complete around the same timeframe.

Properties with Body Corporate Structures

Any property with a body corporate requires additional lender scrutiny. They'll want to see body corporate financial statements, sinking fund balances, and confirmation that the building has no major defects or pending legal action.

This matters for your loan timeline as much as your loan approval. A house in Paralowie might take seven days from application to approval. A unit in Glenelg with a body corporate could add two weeks while the lender reviews strata documents. Some lenders also apply higher interest rates or lower LVRs if the body corporate shows inadequate sinking fund reserves or high owner-occupier to investor ratios. These aren't reasons to avoid body corporate properties, but they require earlier preparation. Requesting body corporate records during your due diligence period, before you apply for finance, keeps your settlement timeline on schedule.

How Property Type Affects Interest Only Lending

Interest only investment loans are common for investors targeting passive income while maintaining cash flow for other purposes. Lenders apply different policies on interest only periods depending on property type.

For established houses and units above 50 square metres, most lenders offer interest only periods up to five years on investment loans. For smaller units, serviced apartments, or properties in regional areas outside the Adelaide metropolitan region, that period often drops to one or two years, or isn't available at all. This affects your repayment structure and tax planning. If you were counting on interest only repayments to maximise tax deductions while building wealth through other assets, discovering your chosen property doesn't qualify for that loan feature means reworking your numbers before you commit.

Dual Occupancy and Granny Flats

Properties with dual occupancy potential or existing granny flats present rental income advantages, but lenders treat them with caution. They'll only recognise rental income from legal, council-approved dwellings.

If you're looking at a property in Salisbury East with a granny flat that generates additional rental income, your lender will require proof of council approval and separate utility connections before they include that income in your serviceability assessment. Without proper approvals, they'll assess the property as a single dwelling regardless of what you're actually collecting in rent. Some lenders won't provide investment property finance on dual occupancy properties at all, which narrows your options for comparison and rate discounts. Confirming the legal status of any secondary dwelling before you make an offer protects you from discovering financing obstacles after your cooling-off period expires.

Rural and Regional Property Restrictions

Lenders define metropolitan boundaries differently, and properties outside those boundaries face tighter lending conditions. What counts as regional for one lender might be acceptable metro for another.

For South Australian public sector employees looking beyond the Adelaide metro area, this becomes relevant quickly. A property in Gawler might receive standard metro treatment from some lenders and regional restrictions from others. Regional classifications typically mean lower maximum LVRs, higher interest rates, and longer valuation timeframes. If you're considering regional property as part of your portfolio growth, identifying which lenders define your target area as metro versus regional changes your shortlist of suitable loan products. This applies whether you're purchasing your first investment or looking at investment loan refinancing to release equity for additional purchases.

The property type you choose sets the boundaries for your financing before you even submit an application. Aligning your property search with lending realities means fewer surprises and clearer numbers when you're ready to move.

Call one of our team or book an appointment at a time that works for you to discuss which property types suit your situation and which lenders will back them on terms that support your plans.

Frequently Asked Questions