It’s only been nine days since Treasurer Jim Chalmers dropped the biggest property tax bombshell in a generation, and apartment owners are right in the firing line. Investors are selling, slashing prices, rethinking strategies – and in at least one case, dropping $30,000 off an asking price after watching a TikTok video about the changes.

Sydney’s auction clearance rate plunged to 49% last weekend – a 6% drop from the previous week and, according to property data firm Cotality, the worst result since the onset of COVID-19 in 2020. Auction numbers fell sharply across the capitals in the aftermath of the budget, though Melbourne held a little steadier at 62.1% and Adelaide at 61.7%.

The numbers matter for apartment owners because units and townhouses are disproportionately held by investors – and it’s investor-heavy segments of the market that analysts say will cop the worst of it.

What actually changed

Negative gearing for established residential properties will be abolished from 1 July 2027 for properties purchased after 7:30pm on 12 May 2026. Investors affected by the changes will no longer be able to offset rental losses against salary or other personal income – instead, losses can only be offset against residential rental income or future capital gains from rental properties.

The government will also replace the 50% Capital Gains Tax discount with a discount based on inflation and introduce a minimum 30% tax on gains from 1 July 2027.

Crucially, existing property owners, including those already under contract before the announcement, are grandfathered and can continue under the old rules. And investors in new builds will be able to choose the 50% CGT discount or the new arrangements, with full negative gearing retained – a carve-out designed to encourage apartment construction.

Apartments are where the pain lands

CBA’s analysis found the combined effect of negative gearing and CGT changes is expected to see house prices just under 3% lower than they otherwise would have been. But the bank was explicit that the impact will be concentrated in market segments where investor participation is highest  – apartments, townhouses and lower-priced established dwellings are likely to be more affected than owner-occupier-dominated detached housing markets.

That’s a direct hit on the strata sector. Generic investor-grade apartments in oversupplied areas could face a double blow: fewer investor buyers going forward, plus existing owners potentially offloading stock they would otherwise have held.

As one Melbourne buyers’ advocate put it: “A $550,000 investor-focused apartment, a $900,000 townhouse, a $1.4 million family home and a $2.5 million school-zone property are not the same market, and they will not behave the same way.” The weaker investor-heavy stock will fall, while quality owner-occupier stock still rises.

In the Illawarra, several properties in the $850K–$1.2M bracket have already quietly reduced price guides or shifted from auction to private treaty since the budget, with investor sentiment noticeably softer.

Rentvestors — the apartment investor class — rethinking everything

Many of the investors most affected are rentvestors: younger Australians who rent where they want to live while owning an investment apartment elsewhere. It’s a strategy built around negative gearing, and the budget has pulled the rug out from under it.

Property investor and buyer’s agent Ravi Sharma told Yahoo Finance the initial feedback from his community was “a lot of frustration because rentvesting is really that strategy for you to get ahead, and what the budget’s really suggesting is maybe it’s not the most fruitful way to go about it.”

SBS News reported that rentvestors, young investors and aspiring first-home buyers are among the groups facing unintended consequences, with some economists warning the reforms could undermine the very strategy young Australians developed because they were priced out of buying where they live.

For strata schemes, this matters directly. A wave of disillusioned rentvestors selling their units could shift the owner-occupier balance in older strata buildings — potentially improving engagement at AGMs, but also flooding the market with listings in complexes that can least afford a price correction.

The two-tier strata market

William Buck’s analysis highlighted a perverse side-effect of the grandfathering provisions: existing property owners “may be less inclined to sell their residential investment property” — because selling means the next buyer won’t get the same tax treatment on an established apartment.

This could create a two-tier market within strata itself. Pre-budget investment apartments carry an embedded tax advantage that makes them more valuable to hold. Post-budget purchases of established apartments carry none of those benefits. The same unit in the same building could have a fundamentally different investment profile depending on when it was bought.

For owners corporations, the practical question is what happens to buildings where a cluster of investors decide to sell at once. Strata managers and committees may find themselves dealing with higher turnover, more vacancy, and the maintenance and levy-collection headaches that come with unsettled ownership.

The “don’t panic” chorus

One Melbourne buyers’ advocate put it bluntly: “Before everyone starts panic-selling investment properties like toilet paper in 2020, let’s be clear — this is not the end of property investing. But it is probably the end of lazy property investing.”

Joyce Property Investments warned against hasty decisions: “The temptation to quickly buy a new build before July 2027, or to sell an existing property in haste, could expose you to costly mistakes. These changes are still subject to Senate passage.”

But SQM Research’s Louis Christopher was less reassuring: “I suspect we’re in now for a lengthy downturn in Sydney and Melbourne. It’s going to be a weak market for some time. There’s no sweetener on the horizon.”

New builds: the exception that could reshape strata

The one corner of the apartment market that stands to benefit is new construction. With negative gearing limited to new builds from 2027, the policy gives newly created dwellings a fundamentally different investment profile, because the tax treatment is no longer a background detail — it’s the deciding factor.

Treasury expects that retaining negative gearing for new dwellings should redirect some investor demand from established properties toward new builds, supporting construction activity, particularly for apartments where investor pre-sales are important.

That could be good news for housing supply — but it could also mean a flood of new investor-grade apartment stock built to capture the tax advantage rather than to meet owner-occupier expectations of quality. Strata communities know all too well what happens when buildings are designed to a price point rather than a living standard.

The TikTok factor

Perhaps the most telling sign of the times is that property investment decisions are now being made on the basis of social media videos. A homeowner dropping $30,000 off their asking price because of something they saw on TikTok captures the mood-driven anxiety now sweeping the market.

Aussie Home Loans buyer’s agent Franklin Webber urged calm: “Don’t rush. The rules have changed but only at an individual level.” The reforms are significant, but they’re not yet law, they don’t affect existing holdings, and panicked decisions carry real risk.

For apartment owners, the next 12 months will be about separating signal from noise.

The buildings most at risk are those already carrying the hallmarks of investor-dominated stock: high turnover, thin owner-occupier interest, and maintenance deferred because absentee landlords voted down levies. The budget changes won’t create those problems – but they could make them harder to ignore.