Sussex Barn Conversion

There is something deeply satisfying about a historic barn conversion done well. The challenge is not simply one of renovation — it is one of transformation. How do you breathe new life into a centuries-old agricultural building while respecting its character, protecting its fabric, and making it structurally safe for modern living? That question was at the heart of this project on the Sussex coast where we worked alongside with John Bullock Architects.

Structural Work: The Barn

The barn was stripped completely down to the original flint and brick walls — built in the distinctive Sussex vernacular, with knapped flint panels framed by brick quoins — which were sound but largely exposed to the elements. The roof structure, built with high pitch rafters and tie beams, was intact and in good condition.

The floor was a simple ground bearing slab, but it was established early on that the building would benefit with a reduction of the existing ground level to create additional headroom. To achieve this, it was necessary to underpin the existing external walls.

The Single-Storey Extension: New Oak Frame

Attached to the main barn was a single-storey outbuilding — functional in its time, but dated and out of keeping with the ambition of the project. This would be completely reimagined.

The existing single-storey outbuilding was transformed into a contemporary glazed extension, and the structural approach here was a deliberate celebration of natural materials. The oak timber posts supported on staddle stones now frame the large panels of steel-frame glazing, and internal oak trusses support the original roof, creating a new open-plan internal space.

Structural Work: The Terraced Landscape

The barn itself sits in the South Downs countryside.

An external stepped terrace had already been carved into a sloping hill at the back of the barn. This was completely re-imagined as part of the overall project. The terracing was increased in size to enable wider paved areas and new green landscaping, and also a plunge pool. Monson Engineering provided the design of the new external walls and foundations.

What This Project Is Really About

Barn conversions of this type sit at a fascinating intersection of heritage, engineering, and contemporary design. The flint walls that have stood for centuries are still standing. The structural engineer's job is not to impose on the building, but to enable it — to find ways of making the old and the new work together without either compromising the other.

Working on a barn conversion or heritage project? Get in touch — we'd love to help.