For homeowners looking to expand their living space in busy urban and suburban areas, there is often limited space available to expand the home outwards or upwards.

Basement conversions, therefore, are an increasingly popular option among London homeowners that help people create space for different purposes and increase the value of their properties.

At DS Squared Architects, we provide an end-to-end basement conversion service, coordinating with a network of skilled consultants to create airy, light and versatile modern basements to enrich the lives of you and your family.


Basement conversions are the perfect way to extend your living space downwards without increasing the footprint of your existing property. By doing so, you won’t encroach on your garden or parking space, cut off light from yourself or your neighbours, or fundamentally change the character of your home (unless of course that is your goal).

If you live in a terraced property, a basement conversion may be the only realistic option to moving house if you need more space, and in heritage conservation areas, it may be easier to obtain planning permission for a basement conversion than it would be for an extension of the equivalent size.

In terms of use, a basement extension can be used for a wide range of purposes, including:

  • Games room/children’s play area
  • Utility room
  • Extra storage
  • Home gym
  • Sauna/hot tub room
  • Art studio
  • Home Office
  • Guest bedroom
  • Cinema room
  • Wine cellar
  • Even swimming pools! 

In fact, a basement conversion can be used for almost the same scope of purpose as an above-ground extension. A high-quality basement conversion can add significant value to your property, especially in heavily built-up areas in which space is valued as a premium.


Traditional cellars have a reputation for being cramped, damp and dark spaces. However, due to our use of light wells and contemporary structural design, the strategically placed glazing and clever lighting basement conversions we create at DS Squared Architects are the very opposite of this – light, spacious roomy structures with plenty of space for a variety of fixtures and furnishings.

We design each basement conversion to incorporate optimal drainage and light, and to facilitate easy and seamless access from the main body of the house.


If you are considering ways to extend the living space in your home and would like to explore alternatives to a traditional extension, have a chat with one of our RIBA Chartered Architects about basement conversions today. We offer support throughout the whole process, from site surveys and feasibility studies, through to technical drawings, planning support and project management during the build.

Call us today on 020 8732 5620 or click here to send us a message.


Basement Extension

Basement Extension



The project involved a new basement that extended under the existing property and under the garden. The existing property was a substantial five bedroom residential property and the 130msqu new basement included a media room, en-suite, shower room with wc, utility, storage room.

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