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Basement conversion into modern living room in London


Clean basement conversion in contemporary style


Teams of Diamond Construction specialists use only the best materials, equipment, as well as technological and functional solutions to comprehensively and quickly conduct all the necessary work. This includes, for instance:

  • plumbing,
  • lighting,
  • damp proofing,
  • electrical work,
  • additional tasks.

We are the basement company, which focuses on the needs and expectations of every customer. That is why we offer coordination on each stage of the project realisation – starting with adjustments to the initial project, through all of the changes according to your vision, up to final improvements and even the tiniest corrections. Our teams have successfully conducted numerous basement extensions in London, which allowed them to gain experience in remodelling the space in traditional or modern style, implementation of innovative technological solutions, as well as transformation of space of very different types and sizes. What is more, the cost is always adjusted to the customer’s possibilities, without compromises in terms of quality of our work.


Basement conversion infographic

Basement conversion infographic


Contemporary basement conversion in London – second view


Basement extension converted into a cinema room


Trust the experience and professionalism of Diamond Constructions Ltd. andconvert, extend your house or get fantastic bespoke furniture for your interiors.

  • Financial Responsibility to Our Clients
  • On Time and on Budget
  • Real focus on Customer Satisfaction
  • Superior Quality and Craftsmanship
  • Quality and Value to the Project we deliver


Check our Frequently Asked Questions (FAQ).

  • Is planning permission obligatory?

    In most cases it is not needed, as the changes are conducted only on the inside of your building. However, in case of some projects it might become a necessary requirement. For instance, when the plan involves adding an entrance or windows on the front side of the property, digging completely new basement or digging up a pavement or part of the road outside your house, the local council must first provide you with a planning permission.
    When you think of extending your rooms or changing its structure in the future, it is advised as well to familiarize yourself with planning permission specifics for basement conversions.
    Different regulations apply to a listed building. Before starting any work it is necessary to acquire planning permission, also in the case of changes not visible from the outside.

    It is required because such properties are under protection for, for instance historical reasons. Remember, that even if you do not need a planning permission, the conducted work must always comply with building regulations. They are a set of regulations, which apply for all new living space and guarantee the residents’ safety.

  • Do I get any financial benefits?

  • Can my basement be converted?

  • Is there something else I need to consider?

0208 648 56 00
0790 483 75 81

Unit 4, 245 Church Road
Mitcham CR4 3BH

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