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Your trusted company for loft conversions, extensions and general building projects.

We are experts in the project management of loft conversions, extensions and refurbishments throughout London and surrounding areas.  Our approach is to provide our clients with a team of people that know how to work together, with the experience and skills required to make the project a success for all involved.  It is our aim to always operate in an open and harmonious environment with a ‘partnering’ style approach adopted so that when challenges occur we work together to find the best solution.​

For the past 10 years we have been dedicated to establish good relationships with some of the most significant manufacturers in Europe, allowing us to ensure we can provide our clients, developers, architects and designers with what we believe to be the most diverse collection of materials to achieve the best finishes possible materials such as stone, ceramic tiles, wood flooring etc. We are actively involved in a variety of projects from corporate buildings and hotels to general residential developments.

We are committed to raising standards of service and safety and to achieving maximum value by working in partnership with Clients, Consultants and Suppliers whilst avoiding waste and damage to the environment.


iRoom Extensions

At CUK21 we believe it is vital for construction to evolve and be innovative in order to meet the demands of the 21st century. In fast paced modern society time and convenience is precious. Our "intelligent room" extensions promise to be faster, cheaper and more environmentally considerate without compromising build quality.  Learn more from the detailed overview below.



Renovation of a substantial three-bedroom house. By opening up the kitchen, rear utility and w.c we managed to create a spacious and sociable kitchen and dining area leading onto the rear garden. With clean design and neutral colours continuing throughout the house as well as a number of upgrades including new internal doors pocket sliding, bathroom with free standing bath, wet room and under floor heating the overall appearance and feel of the property was transformed

We carried out a full renovation of these one bedroom town houses. This included opening up the outdoors front and side, dwarf wall with metal railings, paving slabs with rapid draining were used to help maintaining a clean and dry outdoors through out the winter. Building a second floor extension and adding a loft conversion with ensuite shower rooms. Working closely with the client throughout the build, we created these truly special homes filled with character and elegance.

This project comprised of a full renovation of this very special detached house located in Kingston. This included opening the kitchen area to achieve an L shape kitchen / dinner, installing a ground and second floor extension and adding a loft conversion. Working closely with the client, building upon their ideas and flare for design throughout the build, we created a truly special home filled with character, elegance and great entertaining space. 


At CUK21 we can work with any kind of space  - even oddly shaped, cramped or drafty spaces can be transformed into an amazing getaway. The loft is too often an unused space in the home.

As your family grows or your lifestyle changes, you probably need more from your home. Consider remodeling your upper floor as an economical way of increasing the living space and value of your home. 


You may desire an loft conversion if:

  • You need more room for a growing family 

  • You would like a home office or study

  • You desire another room for entertaining guests and visitors

  • A third-storey bathroom would make your family life easier

  • You need air-conditioned storage or room for a hobby





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