Upsizing in a Softer Sydney Property Market: Why the Price Gap Matters More

Why a Softer Market Looks Different to an Upsizer

If you are selling to buy something larger, a lower sale price is only half the picture. A softer market can reduce what you receive for your current home. It can also reduce what the next one costs. For an upsizer, a lower sale price can be offset by a larger saving on the next home.

That does not make the move easy, and it does not mean the numbers will work for your household. It means the sale price alone is the wrong place to stop. We looked at the wider market in our piece on the Sydney property market slowdown. This article is about the arithmetic that sits underneath a single move.

The Number That Matters Is the Gap

The more useful number is the gap between what you sell for and what you pay. A smaller gap means less to fund from savings, borrowing or both, and a larger one means more. Both prices move, so the gap can move with them.

An Illustration: $100,000 Less, $300,000 Less

This is an illustration, not an actual client transaction, and it is not a guaranteed saving. It shows how the gap can behave.

• Your sale: a homeowner receives $100,000 less for their current home than they had expected.
• Your purchase: the larger home they want costs $2.7 million instead of $3 million, which is $300,000 less.
• The result: after allowing for the $100,000 they gave up on the sale, they need roughly $200,000 less to fund the move, before stamp duty and other transaction costs.

Two cautions apply. First, the comparison depends on credible price benchmarks. You need evidence for what your home is likely to achieve and for what the next one will cost, not hopeful assumptions in either direction. Second, it is not a guaranteed wealth gain. Nothing here predicts where prices go next, and the home you want may not be available at the price you have in mind.

Buying First or Selling First

Timing matters as much as price. Buying first can force a rushed sale of your current home. Selling first can mean renting, or feeling pressure to compromise on the next purchase because the right home has not appeared.

There is no single rule about which should come first. The right strategy depends on your household's finances, flexibility and priorities. Financing is part of that decision, because what you can borrow, and on what terms, depends on your circumstances. It is worth speaking to a mortgage broker or lender early, before you are committed to either side of the move.

Transaction costs on both sides, including stamp duty, agent and legal fees and the cost of moving, reduce the gap you have worked out. Allow for them in the numbers, not afterwards.

How Preparation Reduces the Uncertainty

We help clients assess their existing home's value, run a preliminary search and establish what they can realistically buy before they commit. Understanding both sides of the move reduces uncertainty and supports better decisions. It also means you are working from recent comparable sales rather than asking prices or the figures you were hearing a year ago.

What Matters When Choosing the Next Family Home

A larger home is a bigger commitment, so the same discipline applies as with any purchase.

• The things you cannot change later - location, aspect, floor plan and the size and shape of the block usually matter more than finishes you can renovate.
• What due diligence turns up - building condition, approvals and, for strata properties, the building's finances and records.
• How long the home will suit you - the next stage of your household's life, not just the next year.
• Your price limit - and whether you are prepared to walk away if the numbers stop working.

Upsizing Is About the Whole Move

Upsizing decisions should be based on the entire move, not just the sale price of the existing home. Work out the gap, test it against real evidence, allow for the costs and decide which order suits your household.

If you would like a second opinion on either side of the move, we are happy to talk it through. Our page for families explains how we work with households who are growing out of their home, and our client stories show recent purchases.

Where to go next

• Families - how we help households moving to a larger home
• Full service buying - end-to-end search, evaluation and negotiation
• Sydney property market slowdown - why falling prices do not always mean a bargain
• Client stories - recent purchases across the Lower North Shore and beyond

Source: Inform Buyers' Q3 2026 quarterly update (21 October 2026). The $100,000 and $300,000 figures are a hypothetical illustration, not a client transaction. General information only; seek advice from a qualified financial adviser, accountant or mortgage broker about your own circumstances.