The decision of whether to move or extend is a perennial one for homeowners and, with so many factors to consider, is always difficult to weigh up, in terms of the cost and stress involved versus the final outcome. Of course, such a decision is dependent on personal circumstances and preferences, but, leaving these aside, there are certain considerations that everyone should think about.
We spoke to seven planning and property experts who highlighted the issues you need to analyse before making a decision, particularly in the 2026 property and home improvement markets.
Moving is more beneficial if you’re buying bigger
The existing house-buying market is one that rewards buyers trading up. While they might sell their own property for a bit less, it’s likely they will make the difference back and more on their purchase.
“For households looking to trade up, moving can make sense in a softer UK market,” says Michael Holmes, property expert for the Homebuilding & Renovating Show.
Read more: Nine property market predictions for 2026
“When prices are subdued, buyers often find they can negotiate harder on the purchase than they would in a boom — so even if they accept a lower price on their own sale, the pounds-and-pence saving on the more expensive next home can be greater.”
Extending isn’t always cost-effective
While extending might give you the extra space to stay in a property, be wary of spending more than you’ll ever get back if and when you sell.
“Build costs per square metre have risen sharply in recent years and have reached the point where extending only makes financial sense in high-value areas. In those places, every extra square metre you build adds more to the value of a property than you pay for it,” says Simon Cairnes, property expert at BuyAssociation.
“Typical extension build costs are around £1,800–£3,000 per square metre so, on average, extending is most viable in regions where typical property values per square metre sit above that… Ultimately, extending hinges on three core issues: the true build cost per square metre, the local value per square metre, and the cost of moving.”
Areas where extending is likely to be cost-effective include London and the South, whereas, in the North and Wales, extensions tend to be more lifestyle-led than value-led. That said, even in the South, you need to be wary about costs stacking up.
“Not every property has good potential to be extended or have major alterations carried out to it,” says Michael Zucker, of London estate agent Jeremy Leaf & Co.
