Trevarno is a private country estate in south-west Cornwall, England, UK, near the village of Crowntown, 2 miles (3.2 km) north-east of Helston.

Bickford-Smith was a rich local businessman turned Liberal politician, whose interests included tin mining and the Helston Railway, which ran through the estate and of which he was co-developer and chairman.

He supplemented the existing well-developed Georgian garden to create a merger of Georgian-Victorian styles, adding:[3][4] In the locally mild climate, rare tender plants, trees and shrubs could easily flourish.

[5] After four generations of occupation, in 1994 the Bickford-Smith family sold the residual 750 acres (300 ha) estate to the two directors of a local electronics company.

[6] Following the sale of the manor house, the Helston Railway which has 1 mile (1.6 km) of track running across the estate lands came to an agreement with the new owners to allow continuation of the operation of their line.