The $10 million club: what a decade of Lower North Shore prestige sales actually shows

Two pieces of analysis, one honest picture — the macro view across the Lower North Shore, and the micro view inside Mosman.

Ask most people what has happened to prices at the top of the Lower North Shore and you tend to get the same answer: everything has doubled, the trophy homes are flying, and you would have been mad not to buy a decade ago. The first part is broadly true on paper. The rest deserves a closer look.

We have recently approached that question from two directions. We ran a deep dive into every Mosman house sale since 2015, and a wide sweep of every sale of $10 million or more right across the Lower North Shore — from Mosman in the east through to Hunters Hill in the west. Read together, the macro and the micro tell a more useful story than the headline number, and a more honest one. For anyone weighing up a purchase at the top of this market, the difference matters.

The $10 million club has grown up

Start with the breadth of the market. Across the Lower North Shore we identified more than 470 genuine individual purchases of $10 million or more since 2015 (we removed development-site amalgamations, bulk strata settlements and corporate acquisitions from the raw data, so what remains is people buying homes). The pattern is unmistakable. In 2015 there were just four house sales at $10 million-plus across the entire region. By 2025 there were 86 — a rise of more than twentyfold. The number of homes trading above $10 million has gone from a rarity to a near-weekly event.

That broadening is the single biggest shift in the prestige market, and it is the one most commentary misses by fixating on a median. But it needs one honest qualification. A $10 million line is a fixed nominal threshold, and inflation quietly pushes more homes across it every year. Some of the club’s growth is genuine new prestige activity; some is simply the dollar buying less than it used to. Hold that thought, because it is the key to reading the rest.

Most of the headline growth is inflation

This is where the Mosman deep dive earns its keep, because Mosman has the depth of sales to measure properly. In plain, as-sold terms, the Mosman house median rose from $3.10 million in 2015 to $5.82 million in 2025 — up 88 per cent, which is where the “prices have doubled” story comes from. But once you convert every sale into today’s dollars using the Consumer Price Index, the broad market grew about 42 per cent over the decade, or 3.6 per cent a year in real terms. Solid, dependable growth — and a long way short of doubling.

The gap between those two numbers is the most important thing a prestige buyer can understand. Nearly half of the headline gain is not the house becoming more valuable; it is the currency becoming less so. A home that looks like it almost doubled has, in real purchasing power, grown by a bit over forty per cent. That is still a good result for an asset you also get to live in. It is just not the runaway number the dinner-party version implies.