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Pocketmags Digital Magazines
Pocketmags Digital Magazines

DESIGNING a basement extension

Digging down is a fantastic way to add more living space to your house, but is it right for your property? Julian Owen takes a closer look at the main design considerations
Architectural firm Alma-Nac ( has redesigned this mews house in London, including adding new basement and top-storey levels.

While basements are often a standard feature of new homes in other countries, such as the USA, this isn’t the case in Britain. There are simply not enough basements being built here, which is a shame because they can increase the size of a house by up to 50% without requiring more land. Some people might be put off the idea owing to visions of dank, smelly, uninviting spaces fit only for storage – but this is simply no longer the case thanks to sophisticated new building techniques. More and more homeowners are now realising the potential of digging down or converting cellars into comfortable extra rooms.

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About Build It

What's inside the April 2018 edition of Build It magazine: - Stunning eco home on a heritage plot (page 22) - Glazed doors design ideas (page 64) - Renovating for profit (page 71) - Garage design options (page 74) - Complete guide to building with timber (page 81) - How to get planning on your garden (page 110) - Window cost guide (page 117) ... and much more!