About Us

KESZ Construction is a design-and-build company based in North-West London, specializing in loft conversion, house extension, home refurbishment, and flooring.  

At KESZ Construction, we pride ourselves on the consistent delivery of great quality developments, on time and on budget. From concept to completion we deliver a first class service using top quality products. We strictly adhere to British standards and work in accordance with the manufacturer’s recommendations. 


Whether you’re looking for an all new kitchen/diner, a two-story rear extension or even a full apartment refurbishment, we can help you every step of the way. We draw up designs based on your specifications and ensure that our work is fully compliant with building regulations and council planning. Meanwhile, fixed prices and timescales mean you’ll know exactly what you have to pay and for how long our expert builders will be on site.

All of our home extensions in London are covered by a 10-year guarantee. We provide all of the relevant certification and paperwork on completion of your project.


If you are in the London area, we are ready and waiting to transform your home. Contact us today for your free, no-obligation quote!