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14 tips for saving money on your extension

Homebuilding & Renovating

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September 2025

A well-designed extension can add value and floor space to your home without breaking the bank. Discover the best strategies for clawing back costs on your project

14 tips for saving money on your extension

A well-conceived extension can drastically change the look and feel of your home, transforming how you use the space on a day-to-day basis. But before getting carried away with fantasies of your dream design, it’s important to get to grips with the budget you have available to avoid disappointment later when your cash won't stretch to cover the design features and finishes you wanted. Of course, you might have to make compromises during your build - but that doesn’t mean you can’t create an extension that’s functional and stylish. Here, we take a closer look at the best ways to build an addition that ticks all the boxes - without overspending.

1 Employ a design professional

You might think that bringing another professional in for your extension will simply add to the total sum you're forking out on professional fees. However, a design expert can help you get the best bang for your buck when it comes to crafting the design for your new space.

Depending on the type of professional you employ - something we'll discuss in more depth later - a design expert will have the skills, experience and vision to come up with creative solutions that make the most of your space and budget. Plus, they'll know the best places to invest your cash for maximum impact. Not to mention, they’ll have a portfolio of professional contacts you can draw on, from builders to glazing suppliers. So while appointing a pro to draw up plans may not be the cheapest route, you'll see the return in added value when the extension is complete.

2 Decide on the type of extension that will deliver best value

Whether a two-storey rear extension, a simple side return infill or a loft addition, the project that offers the best value for money depends on both the unique features of your existing home and what you hope to gain from doing the project.

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