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Bespoke Basement Conversions in Chesterfield,
Sheffield  and Across South Yorkshire

If you have an underused cellar and want to add extra space to your home but are subject to height restrictions or don’t want to lose valuable outdoor space, we have the perfect solution. Designed to Build Ltd undertakes full basement conversions from design to completion, creating stylish, functional and comfortable space you can use in any number of ways. Whether you’re looking to add a bedroom or bathroom or create a luxury space such as a cinema room, we deliver efficient, cost-effective solutions. We carry out work to your specifications and undertake all planning, waterproofing and construction for a stress-free experience, no matter the size of your project.

Working throughout South Yorkshire, including Sheffield, Chesterfield and all the surrounding areas, we transform existing spaces and, with a 12-month guarantee on all our workmanship, our customers have complete peace of mind.

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Design to Completion

Designed to Build Ltd offers full in-house services for basement conversions, covering everything from initial conception to completion and sign-off. Our surveyors will review the available space and design a conversion suited to your home and needs, including a tailored waterproofing system.

We can provide 2D and 3D plans to help you visualise your new space, and we undertake all construction services, including insulation, ventilation, lighting and heating, ensuring full compliance with building regulations. We can create all kinds of spaces for homeowners in South Yorkshire, Sheffield and Chesterfield, with popular options including:

  • Bedrooms
  • Bathrooms
  • Playrooms
  • Home Offices
  • Home Gyms
  • Cinema Rooms
  • Games Rooms
  • Entertainment/Media Rooms

Planning Permission

Basement conversions do not generally require planning permission, but it is always important to check with your local authority. Designed to Building Ltd can provide planning advice and assistance, including help with party wall agreements, to ensure your project runs smoothly.

It is important to remember that conversions will require building regulations approval but, by adhering to latest legislation, our skilled team makes sure your conversion passes all inspections.


Professional waterproofing is a vital part of any basement conversion, ensuring spaces are completely dry and habitable. At Designed to Build Ltd, waterproofing and damp proofing are two of our specialties and we undertake various techniques to suit every project, including garage conversions as well as basement alterations. As part of your conversion in South Yorkshire, Sheffield, Chesterfield or surrounds, we design a waterproofing system tailored to your property, ensuring reliable and durable results.

Advantages of Basement Conversions

A basement conversion allows you to add an additional living storey to your home without having to raise the height of your roof or build into the garden. This makes it an ideal project for homeowners who live in areas with building restrictions and for those who have small gardens or don’t want to lose any outdoor space.

Furthermore, if you underuse or neglect your cellar, a conversion helps make the most existing space in your home. It can also increase the value of your property by around 20-30%.

For personalised basement conversions in Chesterfield, Sheffield and all the surrounding areas, call Designed to Build Ltd today on 07903 603029.