Basement Conversions

If you’re lucky enough to have a basement then why not make use of the space? Our basement services include new installations and renovations so you can gain additional space in your home.
We serve London and surrounding areas.

Many homes have a basement but don’t make very good use of the space. Even if you have a finished basement, you might need a skilled basement contractor and project manager for a remodelling or overhaul. We offer basement planning and design services throughout Greater London and the surroundings, and are happy to offer a free consultation session.

In many cases, a completely new basement can be excavated for an existing home. Summit can help you with the planning, the structural engineering services and the interior design of your new basement space. Note that such excavations often take 12 weeks or more to complete.

Whether your dream basement includes a home office, a wine cellar, a games room or nearly anything else, Summit Architecture’s basement design and planning services can help you create exactly the downstairs space you need. No matter what you select, it will almost certainly add value and practicality to your home.

Types of basement conversions

Partial Basement Conversion
If a basement already exists in a habitable state – below ground level and tall enough to stand in comfortably – it may be a candidate for partial basement conversion. Even if some excavation is required, this often falls under the remit of ‘permitted development’.
Full Basement Conversion

If no basement space exists, you may still be able to build the underground room of your dreams via full basement conversion. This will mean full excavation and structural design to ensure that it presents no danger to the home above, of course!

Subject to planning and practical restrictions, it may even be possible to excavate more than one level. This would add dramatically to the usable living space (and value) of your home.

Get in touch!

Book in for a casual, no obligation chat with one of our consultants who can talk you through each process of your project and how best Summit can help.

Get in touch!

Book in for a casual, no obligation chat with one of our consultants who can talk you through each process of your project and how best Summit can help.

Overview of Services

The Summit scope of services you will need to complete your project

Our Reviews

What you can expect when working with our dedicated team.
Daljinder Mohamed
Daljinder Mohamed
We wanted a two-storey extension to the rear of our property and maximise our upstairs space to accommodate a bigger bedroom. Micaiah was very professional and helpful. She listened to our requirements, came up with multiple high quality designs and was extremely patient with us throughout the process. Furthermore, she was persistent and fought our case well during the planning approval process. We would highly recommend.
Isabelle Jourdan
Isabelle Jourdan
Seamless and first class service!I’ve been extremely impressed by the service delivered by Summit. The team made the whole experience very smooth and painless. At times, it felt like being on a conveyor belt effortlessly being passed on from one member of the team to the next for support at the various stages, taking away all the pressure and anxiety of having to think about the next step myself, I felt in safe hands. I'd like to particularly thank Nicolette who was an absolute gem and a mine of information, responding to emails outside office hours and always finding a response to my queries, and also Hania who helped me with the Scope of Work. Jamiul provided very helpful and expert advice to get the planning application approved, and all other members of the team were equally efficient. I have managed to find a builder through Nicolette and I’m very excited to have a start date for my project. I highly recommend Summit Architecture, first class service, lovely friendly team. Would definitely use them again!
Eleana Gkogka
Eleana Gkogka
Very professional service and great communication. They really helped me with my full home renovation plan and structural calculations. I highly recommend.
Robert Coppin
Robert Coppin
An excellent experience. I was buying a house and needed to make sure that some structural work had been done to a high standard. It was a complex task, and the people selling the house were a bit difficult. But the Summit team stuck with it, and were professional, polite and creative. I received the structural report in good time. They were responsive and also their quote was the best value. I would recommend them without hesitation.
LMB Group Ltd
LMB Group Ltd
LMB Group has always had a brilliant relationship with Summit Architecture. We would recommend them highly to anyone in the industry looking across London.
adam humphries
adam humphries
We had a very tricky time getting our design through planning as we live in a conservation area. The team at Summit and in particular our architect Gus were incredibly supportive and always there to talk to and allay any worries. As well as the support, Summit made the design process inclusive and fun. I would highly recommend them.
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Start Your Dream Project Today!

Book in for a casual, no obligation chat with one of our consultants who can talk you through each process of your project and how best Summit can help.