Long Barn Wiltshire, barn conversion

Ktirio Design and Build are one of Swindon’s leading builders, specialising in loft conversions, house alternations such as extensions, period renovations and new home builds.

We are experts in all aspects of building work, extensions, building renovations and alteration works for existing and new properties. We have over two decades worth of expertise and knowledge with the the building industry with over two decades of experience. Ktirio can help with all aspects of your building project, from the first meeting, providing detailed drawings, building works, through to project completion. We can work on specific areas of your project or provide you with a full turnkey building solution providing you with full peace of mind that everything is being managed to your requirements to deliver you the property of your dreams.

Builders in Swindon

Ktirio Design and Build manage the whole project from start to finish, providing a detailed and itemised estimate, overseeing Health and Safety. Leasing with building control if needed, sourcing and managing all trades, ensuring quality of works is maintained and time scales adhered to. Basically we will handle everything for you.

We are experienced builders that can offer a complete range of building services to customers in Swindon and the surrounding areas, delivering your project large or small. If you’d like us to work on a specific element or project manage the entire build from start to finish we can meet your needs. Whatever you decide, you can be sure of a quality outcome.

Locations We Operate In

We offer design and build services to Swindon and the surrounding areas between Bristol, Oxford and Reading up to Cheltenham, Gloucester and down to Salisbury and Southampton.

We are proud to have over two decades experience in the design and building trades and cover work from basic builds and installations to full turnkey building projects where we take responsibility for all professionals trades, time-manage the build and controlling the project from start to finish; providing you with exactly what you want, but without the stress.

For a comprehensive list of the areas which we operate in, see below:

Swindon, Wroughton, Wanbrough, Aldbourne, Liddington, Castle Eaton, Fairford, Chippenham, Bradforrd on Avon, Upavon, Cirencester, Brize Norton, Newbury, Witney, Trowbridge, Highworth, Henley-on-Thames, Lechlade-on-Thames, Thatcham, Abingdon, Stroud, Gloucester, Cheltenham, Amesbury, Andover, Chipping Sodbury, Bath, Reading, Bristol, Oxford, Kiddlington, Faringdon, Marlborough, Baskingstoke, Tetbury, Moreton in Marsh, Burford, Castle Combe, Bourton-on-the-Water, Bracknell, Wokingham, Mortimer, Banbury, Carterton, Bicester, Didcot, Kingswood, Mangotsfield, Nailsea, Salisbury, Lacock, Chippenham, Corsham, Avebury, Wells, Ascott under Wychwood, Chipping Norton, Dorchester-on-Thames, Wantage.

Full Turnkey Build Solution


We are ready!

Having specialised in improving properties and working on bespoke building projects for more than two decades, we have a highly competent, experienced team ready to listen to your ideas and develop the property of your dreams.


Each building project, whether a single storey extension or a complete new build, focuses entirely on the client’s requirements. Our aim is to provide the highest specification and quality, within the budget, and advise on the best options.