Basement Extension

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Our Services for Basement Extension

A basement extension is a great solution if extending out or upwards is not a feasible option. This is often the case in London or other cities, where development regulations, or a lack of space, can prevent them. Alternatively, you may already have a loft conversion Londonsingle storey extension, or double storey extension, but still need more room for your family or to use as a spare room, a games room or even an office space. A basement extension can create new rooms with unique qualities.

From an architectural perspective, a house extension London in underground spaces may not be ideal for a kitchen or dining room because of the limited natural light and views, but they are certainly useful for entertaining spaces, such as cinema rooms, children’s playrooms or even swimming pools. The space from a basement extension is so versatile, that you can transform it to become your dream room that may not necessarily fit with the interior of the rest of your property. A basement extensions enables you to have a relaxing space that is away from the world or can be a perfect area to entertain guests or can even be a utility room that is completely out of the way.

Why Choose A Basement Extension For Your Property?

Basement extensions are fast becoming the most popular type of home extension in London, and even if you don’t have a basement, you can still have a basement extension by excavating down. At Extension Architecture, our architects in London have extensive knowledge when it comes to making your house extension come to life.

A massive benefit of a basement extension is that you don’t lose any external space, but instead gain internal living space, which is closer to the living area of your house, as opposed to a lost. Typically, securing planning consent is relatively easy, especially if people have opted for a basement extension in your street.

Basement extensions can also add value to a property, particularly urban areas, as it created additional space, but also as the extension will free up space in other parts of the house.  This adaptable room can also change depending on what your family needs. The space doesn’t have to be used for practical purposes and can be simply a room where you relax comfortably, as a basement extension can be cooled or heated, so you can transform your unused basement into one of the most enjoyable and pleasant rooms in your house.

At Extension Architecture, we have worked on many different projects for basement extensions, so have years of experience helping home owners to create their dream space or a practical area. Please view our previous work to see the fantastic results that our clients have been delighted with. We will work with you to ensure that everything you need and want out of your basement extension is met.

If you would like to find out more information about our services, get in touch with our team today. We can offer you a free consultation and even provide you with a quote if you let us know about your plan that you have.

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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