Coop House, west of Netherby Hall

Coop House, located west of Netherby Hall, is a folly tower that was formerly the keeper's house for the salmon coops associated with Netherby Hall. It was likely built in the mid-18th century for the Reverend Robert Graham, with early 19th-century additions made for Sir James Graham. The structure features red sandstone rubble walls set on a chamfered plinth, with flush quoins, a string course, and a battlemented parapet. It stands two storeys tall with three bays, while the central recessed bay is a single storey. The entrance includes a pointed-arch doorway with a hood mould, and there are cruciform openings and a battlemented parapet. The early 19th-century flanking towers have cross-mullioned blocked windows, with similar two-light mullioned windows above. The rear of the building has single-light windows.

Coop House is situated on the river bank and is all that remains of the salmon coops. It is believed to have been influenced by the gatehouse of Wetheral Priory and the salmon coops belonging to that Priory. The Reverend Robert Graham consulted Mr. Howard of Corby Castle regarding the layout of the landscape garden at Netherby.