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Mark Horner Architects specialise in the renovation, extension and conversion of oast houses, and other domestic buildings as well as barns, granaries, former industrial, agricultural and office buildings. They create beautiful homes through innovative and sensitive design. They are specialists in heritage and listed buildings throughout Kent and Sussex.

About Mark

Mark studied at Brighton School of Architecture and has 25 years’ experience covering a wide range of projects. He has run his own practice for the past 12 years and has a particular interest in historical buildings. One of his first projects as a trainee was a Voysey house in the Lake District and since then he has also been privileged to work on buildings by, Waterhouse, Baillie Scott, Lutyens and Pugin.

He has a real passion for oast houses and he has studied some 3,000 buildings! These quaint, characterful buildings include some of the most beautiful examples of industrial vernacular architecture and are a delightful reminder of the region’s agricultural past.

Listed or unlisted, previously developed or requiring complete renovation, Mark’s sympathetic and creative input can transform these unique structures into stunning and highly desirable homes. Central to his design process is the balance between the client’s needs, respect for a building’s history and fabric, and the conditions of planning and building regulations.

Technical drawing of a barn

Mark’s Services

Conversion to dwellings

If you have an oast house, barn or other vernacular building that you would like to convert to a dwelling, please get in touch. I make an initial visit, without obligation, to discuss the options, talk you through the planning process and give you an approximate idea of costs.

Change of use to residential

Where an oast house or other historic building is currently used as an office, or other non-residential use, the possibility of converting it can be investigated. This can either be to a new dwelling, or possibly into flats or for use as a holiday let.

Extensions, Alterations and Refurbishments

If you are already living in an oast house or a similar building, I am happy to discuss the possibility of an extension, internal alterations and renovation to adapt your home to provide for a more modern way of living.


No-one can fail to be charmed by the sight of a beautiful oast house surrounded by orchards and hop gardens, its towering roundels topped by snowy cowls. However, these are very unusual buildings and potential buyers should consider carefully what is involved before making a commitment.

Mark Horner

Case Studies

Planning Permission was granted to extend the farmhouse considerably and to convert the oast to a substantial dwelling. The original character of the farmhouse was preserved by keeping the Georgian reception rooms to the front, while at the rear the basement was dug out to provide a guest suite, cinema room, sauna and utility room. A new staircase was added and an open-plan kitchen completed the spacious, modern design.

The owners of this oast house on the outskirts of Sandhurst, and which had been converted to a home some years previously, wanted to extend the accommodation. Planning permission was obtained for a two-storey side extension that provided an en-suite to the master bedroom, plus a guest bedroom and en-suite. A further addition to the property formed a new kitchen with a glazed conservatory

Contact Mark

Telephone 01580 763092
Mobile 07976 928586
Technical drawing of a barn