Cobham Park is a Registered grade II* historic park surrounding a grade I Elizabethan mansion. It has a nationally significant assemblage of landscape and archaeological features.
ACTA prepared conservation and management plans for a successful bid to the Heritage Lottery Fund and restoration is now in progress.

Identifying and summarising the international significance of the site’s buildings required extensive consultation with specialists and English Heritage. They included the Neo-classical Darnley Mausoleum, at that time one of the most threatened structures on English Heritage’s Buildings at Risk Register.

A substantial part of the park is a Site of Special Scientific Interest containing a remarkable range of veteran trees. Conservation plan polices and management prescriptions needed to balance the conservation and management of the trees as significant sites for many forms of wildlife with the restoration of the designed landscape.

More recently ACTA has investigated the original design of the seventeenth-century lime avenues and identified how the surviving avenue can be accurately replanted.