I’ve been watching the Sydney prestige property market closely for years, and something fascinating has been happening over the past 12 months. Off-market sales—properties that never appear on Domain or realestate.com.au—now account for nearly 40% of transactions above $5 million in the Eastern Suburbs and Lower North Shore.

This isn’t just a passing trend. It’s a fundamental shift in how high-value properties change hands, and it’s being driven by three key factors that every serious buyer and seller needs to understand.

Privacy Is the New Premium

Let’s be frank: when you’re selling a $7 million home in Mosman, you don’t necessarily want the world knowing about it. I’ve had clients who are going through private family matters, business transitions, or simply don’t want their neighbors gossiping. The traditional open-for-inspection circus doesn’t appeal to everyone.

What surprises many people is that privacy matters just as much to buyers. High-net-worth purchasers often prefer to view properties without competing with 30 other groups on a Saturday morning. They want meaningful conversations with agents, not rushed 15-minute inspections.

Technology Makes Discretion Possible

Here’s where things get interesting. Ten years ago, off-market meant showing properties to a small Rolodex of known buyers. Today, agents can discreetly market to qualified purchasers through private databases, targeted digital campaigns, and yes, AI-powered matching systems.

I recently spoke with AI property technology specialists who explained how machine learning can identify potential buyers based on past behavior, demographic data, and property preferences—all while maintaining confidentiality. This tech allows agents to find the right buyer without broadcasting the listing to thousands of casual browsers.

The result? Properties sell faster, often at higher prices, because you’re connecting with genuinely interested parties rather than tire-kickers.

The Double Bay Effect

I call it the Double Bay Effect, though it’s happening across all prestige suburbs. When a $6.8 million apartment sold off-market in Double Bay last month, it sparked conversations at every dinner party in the neighborhood. Suddenly, three more owners in the same building wanted to know if they could achieve similar results without listing publicly.

This creates a snowball effect. As more sellers choose the off-market route and achieve strong results, it becomes the expected approach rather than the exception.

What This Means for Buyers

If you’re shopping in the prestige market, you absolutely must work with an agent who has access to off-market listings. I’d estimate that about 35-40% of the best properties in suburbs like Vaucluse, Bellevue Hill, and Hunters Hill never hit the public market.

This doesn’t mean you should abandon your Domain alerts—public listings still matter. But you’re missing a significant chunk of available stock if you’re not tapped into the private network.

The Downside Nobody Talks About

I’ll be honest about the challenges here. Off-market sales can sometimes disadvantage sellers if their agent has a limited network. You might be leaving money on the table by not exposing your property to the wider market.

There’s also a transparency issue. Public auctions and listed sales create price benchmarks that help everyone understand market value. When transactions happen behind closed doors, it can be harder to gauge what properties are truly worth.

The NSW government’s property price data helps with this, but there’s always a lag.

Making It Work for You

Whether you’re buying or selling, the key is choosing an agent who operates in both worlds. Someone who can run a traditional campaign when it makes sense, but also has the relationships and technology to execute a sophisticated off-market strategy.

I’ve found that the best approach is often hybrid: start off-market for 2-3 weeks, then go public if you haven’t found the right buyer. This gives you privacy and exclusivity initially, with a backup plan if needed.

The prestige property market in Sydney has evolved dramatically. Off-market sales aren’t a gimmick or a temporary phenomenon—they’re a response to genuine buyer and seller preferences, enabled by technology that didn’t exist five years ago.

If you’re playing in this space, understanding how the private market works isn’t optional anymore. It’s essential.

Linda Powers has been selling Sydney real estate for over 15 years, specializing in prestige properties across the Eastern Suburbs and Lower North Shore.