THESDA specialise in the conversion of barns and the refurbishment of old and Listed Buildings.

We also create character new builds which reflect the historic environment in which they sit.

We work with a team of quality independent architects, surveyors and engineers who all have the same passion and experience for historic buildings and sustainable construction.

We care about the sustainability of your property to ensure that future fuel and maintenance bills are kept to a minimum. Sensible sustainability.

THESDA is your one point of contact to plan, design and build your dream house, be it a conversion or a character new build.



The management team have over 75 years experience in architectural design, surveying, structural engineering and construction.

The partners have come together under the THESDA Group to offer a simple, quality experience.

We have a proven track record of successfully completed barn conversions, new build projects, Listed Building remodelling/extensions and refurbishments.

We manage the whole project - you get on with your life.



We work for property developers, local authorities, homeowners, landlords and self builders.



We work throughout London, the whole of the South East, Hampshire and East Anglia but would consider further afield depending on size of project.


Either by calling 01494 677887 or by emailing us at info@thesda.co.uk