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Building an extension for a swimming pool

An indoor swimming pool is the ultimate luxury addition to any home. Spectacular pools have become a common feature of London’s mansions, with pools being added to incredible basements. That being said, it’s not necessary to be in the 1 percent to be able to add a pool to your home. Yet a heated pool can have an impact on a room not originally designed for it. Issues like ventilation can be a problem, as can finding space for the plant room. If you’re going to splash out on an incredible pool, why not house it properly in a purpose-built extension?

Air flow

The benefit of having an indoor pool is that the water will actually get warm on a reliable basis – unlike an outdoor one. However, heating up the water will increase the humidity in a room and potentially cause issues like condensation, damp, or mould. If you decide to put a pool in an existing room in your house, it will need to be accompanied by some powerful extractor fans and some careful climate control.

Unfortunately, this might turn your serene escape into a noisy experience. If you choose to build an extension, you can incorporate a variety of measures to avoid the need for noisy extractor fans and increase air flow. This will reduce the damage of condensation, too.

Natural light

The problem the super-rich of London face is that while they can dig down and create subterranean palaces for their swimming pools, they lose natural light. With a more traditional extension, you won’t have that problem. In fact, with the right architect you can turn your pool room into a haven of natural light, with an abundance of glass making for an idyllic swimming experience all year round.

Again, although the glass will make it look very special, you’ll need to make sure there’s a plan in place to disperse some of that hot and wet air – otherwise you won’t be able to see out of any of the windows.


If you decide to construct a purpose-built home for your pool, you have two broad options. You can either build an extension, making the pool a part of your home proper, or you could put your pool in a building separate from your house. The key difference is that you may need planning permission for a separate building, and you probably won’t for an extension. There’s also the sheer convenience of the situation to consider. An indoor pool is a way of swimming in your own home without ever having to go outside. While it’s presumably not going to be a long walk, a separate building may still mean braving the elements in the colder months.

If you’re curious about the idea of an extension built to house your very own luxury pool, try doing some research about the options available to you. We’re happy to answer any questions you might have and even give you some inspiration ourselves. Take a look around our site to see our work, or get in touch with a member of our team today.



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96 Kensington High Street London W8 4SG
Studio 2 4 The Highlands Exning Newmarket Suffolk CB8 7NT
T: 01638 662393
Building an extension for a swimming pool