Basement Conversion

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Our Services for Basement Conversion

Make use of your existing space and enlarge your living area with a basement conversion in London, creating a new room with unique qualities that help it stand out. If you’re in a location which makes a traditional house extension London unfeasible, a basement conversion enables you to create your dream space away from the world so you can enjoy some relaxation or host your guests. From an extra bedroom or home office to a more creative space such as a playroom, home gym or even swimming pool, the possibilities are endless so transform your unused space for the better. 

One of the key benefits of a London basement conversion is the addition of internal living space without the need to lose your outdoor space or undergo a full building project, making it significantly easier to secure planning approval. As well as providing you with extra space to enjoy, a basement refurbishment in London is likely to increase the value of your property, especially in desirable urban areas where space is a luxury.

Maximising City Space with a London Basement Conversion

When choosing to live in the heart of the city, a lack of space is a likely sacrifice you’ll have to weigh up. Unless you’re looking into undertaking a loft conversion London, single storey extension, or double storey extension, a basement refurbishment in London is an effective way to maximise your space without compromising on your outdoor area. Although many homeowners are put off by the thought of a dark and cold space with no natural light, the versatility of the space can offer a lot of potential. As the basement is separate from the rest of the house, create an interior that suits your needs without worrying about consistency, and rest assured that the basement conversion in London can be heated or cooled like the rest of your property.

London basement conversions are fast becoming the most popular type of home extension in the city, with endless possibilities. If you do not have an existing basement, our architects in London have extensive knowledge and capabilities, being able to excavate downwards to make your vision a reality and expand your home. Having worked on various projects with different end goals and a wide array of property types, we pride ourselves on establishing a tailored approach to each client so you can get the best for your home.

Discuss Your Basement Conversion in London

If you would like to know more about the possibilities within your property, do not hesitate to get in touch today. We will discuss your aims and recommend the best approach for you, providing a free quote with no obligation. If you’d like to see some of our past projects to get some inspiration for your own home, take a look at a selection of our results below.

Frequently Asked Questions about Basement Extensions

What’s the cost of a Basement Extensions?

The cost of your basement extension will depend on various facotrs such as the building type, size, location, geology and whether or not it is in a conservation area. the Basement Waterproofing Association has provided the most recent costs involved when considering extending your basement:

  • Conversion of existing basement: £900 – £1,400 per square metre
  • Lowering the floor level of an existing basement: £1,500 – £2,000 per square metre
  • Digging a new basement space and underpinning: £2,500 – £3,000 per square metre
  • Digging a new basement: £1,500 – £2,000 per square metre
  • Creating a light well or external access: £5,000 – £7,500 per square metre
  • Planning application council fees (if required) : £206 (householder application), £462 (if new unit of accommodation is proposed)
  • Building Regulations application At least £750
  • Party Wall agreement (if required) At least £700 per neighbour
  • Additional tax if using VAT-registered contractors +20%

Do I need planning permission for Basement Extensions?

If you are planning to convert your existing basement wihtout having to excavate, or change the external appearance of the property then it is not likely that you will need planning permission. However, if you are planning to retrofit your existing basement, by adding light, ventilation or additional structural elements then you will need planning permission. This of course applies to creating a whole new basement all together, planning permission amoungs other mandatory SPD (Supplimentary Planning Documents) will be required. You should always check with your local planning authority to see what information they require, as there are a lot of surveys and assessments that need to be carried out to determine the viability of basment construction, so it is always best to be prepared.

Will a Basement Extension add property value?

A basement extension can increase the value of your home by up to 30%, for example in areas like Hammersmith and Fulham, where space is few and far between, converting a basment if the most popular type of extension. However, there are a few things you need to check out which will give you an indication of how much your cellar conversion is likely to cost. (Remember, you are likely to need a surveyor or architect to help you with some of these investigations.

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