Australian property has spent years climbing, and national home values are still higher than a year ago. But the latest data shows the market has turned, just as new rules have changed how self-managed super funds can borrow for property. For SMSF trustees weighing property in September 2026, the rules on borrowing, related parties and Liquidity may matter more than the headline price trend.

What the latest data shows

According to Westpac's summary of Cotality's Home Value Index, national home values fell 0.9 per cent in August 2026. It was the fifth consecutive monthly decline, leaving values 3.6 per cent below their March 2026 peak.

Over 12 months, national values were still up 2.7 per cent. That annual figure reflects earlier gains rather than current momentum.

The falls were widespread. Sydney values dropped 1.4 per cent in August, Melbourne and Canberra 1.1 per cent, Brisbane 1 per cent, and Adelaide and Perth 0.8 per cent each. Sydney and Melbourne values were down 4.6 and 4.7 per cent over the year respectively.

According to the ABC, Cotality reported that 93 per cent of Capital city suburbs recorded a fall in values through winter, up from 45.8 per cent in autumn. Cotality research director Tim Lawless said the downturn was no longer confined to select markets or higher-value segments.

Why the market has shifted

The ABC reported that the market has faced several headwinds, including three Reserve Bank Interest Rate rises and tax changes affecting property investors.

According to the ATO, reforms announced in the May 2026 federal budget are now law and apply from 1 July 2027. Negative gearing for residential property investments will be limited to new builds, and the 50 per cent CGT discount for individuals, trusts and partnerships will be replaced with cost base indexation and a 30 per cent minimum tax rate on capital gains.

The ATO notes properties held at the time of the announcement are exempt from the negative gearing changes. How these measures affect a particular SMSF strategy may depend on its circumstances.

The big change for SMSF borrowing

The most significant development for SMSF trustees is a change to limited recourse borrowing arrangements, or LRBAs. Under an LRBA, the asset is held in a separate holding trust, and the lender's recourse is limited to that asset.

According to the ATO, the Treasury Laws Amendment (Tax Reform No. 1) Act 2026 received Royal Assent on 26 June. For LRBAs entered into on or after 10 August 2026, borrowing to acquire real property is only allowed if the property is Business real property.

LRBAs are not banned. The ATO says existing LRBAs entered into before 10 August 2026 are unaffected, as is refinancing of those arrangements. Binding contracts exchanged before that date are also unaffected, even if settlement occurs later.

For new arrangements, the property must be business real property when the LRBA starts and must remain so for the life of the loan. If it stops being business real property, the ATO says the fund breaches the borrowing rules and compliance action may apply.

An SMSF can still buy residential property that is not business real property, provided it meets all other rules. It simply cannot finance it through an LRBA.

The rules that have not changed

Several long-standing rules continue to shape SMSF property investment.

Sole purpose: the fund must be maintained to provide retirement benefits. The ATO says no one associated with an SMSF should get a present-day benefit from its investments, so members and their relatives cannot live in or holiday at a fund's residential property.

Related parties: an SMSF generally cannot acquire Assets from related parties. Business real property, meaning land and buildings used wholly and exclusively in a business, is an exception, provided the price reflects market value.

Leasing: business real property leased to a related party is an exception to the in-house asset rules. Any Lease must be at arm's length and reflect market value.

Single acquirable asset: under current LRBA rules, a single arrangement cannot generally cover multiple property titles, even where the properties are substantially the same.

Improvements: the ATO says an SMSF cannot borrow under an LRBA to improve an existing fund asset, such as building a house on vacant land the fund owns.

Liquidity and concentration risk

The SIS regulations require trustees to formulate, regularly review and give effect to an Investment strategy. It must consider risk and return, diversification, liquidity, the fund's ability to meet its liabilities, and whether to hold insurance for members.

A fund with most of its money in one property may have limited diversification. It may also find it harder to pay pensions, meet expenses or pay a death benefit without selling. Selling in a falling market could mean accepting a lower price, and buying and selling costs can be significant.

For example, a hypothetical fund holding a single property worth $800,000 and $40,000 in cash would have little room to cover a vacancy, major repairs and pension payments in the same year.

What trustees may consider

For trustees, the current environment raises several questions. Does the fund's investment strategy address concentration and liquidity if property makes up a large share of assets? If a property is business real property, will it remain so for the life of any new LRBA? Are related party leases documented and charged at market rates?

Valuation is also relevant. SMSF assets must be reported at market value, and a changing market may make up-to-date valuation evidence more important for audits.

The bottom line

Property prices climbed for years, but Cotality data shows national values fell for a fifth straight month in August 2026, though they remain higher than a year ago. For SMSFs, the bigger change may be legal: from 10 August 2026, new LRBAs can only fund real property that is business real property. Sole purpose, related party, liquidity and investment strategy rules continue to apply. Whether property suits a particular fund depends on individual circumstances, and