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Basement Extensions

Biocraft carries out basement extensions, excavations and construction throughout Berkshire, Oxfordshire, Surrey and Hampshire. Existing basements can be enlarged or extended to provide significant additional living space. Alternatively, new build basements can be incorporated into a rear or side extension or under an existing building.

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For further information get in touch with Biocraft:

Benefits of a basement extension

Basement extensions can add significant useable space to your home. One that is professionally constructed can be used as an office, playroom, bedroom, basement studio, home office or theatre. As well as increasing your living space, a basement extension will add value to your home (usually 30-50% more than the basement project cost).

Incorporating a basement into your extension project can be a cost-effective way of gaining a significant increase in floor area with a relatively small increase in the overall building costs. The newly constructed basement acts as the foundation for the extension and therefore the additional cost of the basement will be in the region of 15-25% of the original project cost.

In addition, basements improve the energy efficiency of homes. Heat losses through basement floors and walls are less than those at ground and upper floor levels. Research carried out by BRE found that when looking at two houses of the same above-ground size and construction, the one with a basement is 10% more energy efficient. Living space below ground also offers excellent sound insulation, particularly where a suspended concrete floor is used at ground level.

Basement extension specialists

The resurgence in the interest in basements has been fuelled by the self-build market. Self-builders have recognised the extra flexible living and storage space that basements provide and have used them as home offices, guest bedroom suites, utility rooms, gymnasiums and even swimming pools.

House builders are now beginning to incorporate basements, not only for the more efficient use of expensive land, but also to meet the demands of house buyers for more flexible living space. An added benefit of basements is that they meet the demands of the government for higher density and better levels of sustainability.

Basement extension design and build

Biocraft offers two options when it comes to basement conversions. We can provide a full package which includes design, specification and build. Alternatively, we can offer a purely sub-contract construction service only.

Our structural engineer, architect and building control specialist can prepare plans, arrange for soil and site investigations and prepare all construction details to ensure that your basement complies with all planning, structural, waterproofing and building regulation requirements.

Peace of mind when using Biocraft

Biocraft is a member of the Basement Waterproofing Association (BWA) and the Structural waterproofing group of the PCA. As a basement conversion specialist, we can offer 10-year insurance guarantees through Guarantee Protection Insurance (GPI) Ltd, which is required for new build home warranties.

We’re an approved installer of Isola Platon cavity drainage membrane systems for basement conversions. What’s more, we design our basement conversion solutions in accordance with BS8102, the code of practice for protection of structures against water from the ground.

Biocraft carries out basement extensions,  excavations and construction throughout Berkshire, Oxfordshire, Surrey and Hampshire. For more information or to arrange a quote, please call 0800 781 8358 or email [email protected].