The biggest layout mistake I see in UK homes - Building out. When the answer was always in

The biggest layout mistake I see in UK homes - Building out. When the answer was always in.

51% of UK homeowners renovated in 2024. The median spend hit £21,440 — up 26% year on year. A significant chunk of that went on extensions. Planning applications submitted, sweated over, approved.

And in a large number of those homes, the problem they were trying to solve still exists. Just with a bigger footprint.

A typical 30m² single-storey extension in 2025 costs between £66,000 and £99,000 before VAT and professional fees. That is not a small decision. And yet the question most homeowners never get asked before committing to it is a simple one:

- Is the problem actually a lack of space? Or - is it that the space you have isn’t working?

These are not the same problem. One requires building. The other requires thinking.

I walk into homes where the kitchen is dark because nobody repositioned a wall. Where the living room feels small because the flow from the hall kills it before you arrive. Where a family is planning a £80,000 rear extension because they need a utility room — when there is a perfectly underused space three metres away that nobody thought to reconfigure.

The extension industry does not have a financial incentive to tell you this. I do — because the most interesting work is never the one that adds square footage. It’s the one that finally makes sense of what’s already there.

78% of homeowners prefer to improve rather than move. Most of them are right. They just don’t always know what improving actually means…

Before you dig a single foundation: get someone to look at what you already have. Properly. Not a builder. Not an estate agent. Someone who understands how space works on human beings.

You might still need the extension. But you might not need it to be nearly as big. And you might find that £30,000 of reconfiguration does what £90,000 of building never quite managed.