Ormesby Hall, Yorks.

National Trust
The hall is built of weather-stained stone in a notably plain Palladian style. Originally it was in open countryside but now the suburbs of Middlesborough have encroached on the estate. The two-story service wing on the east was formed out of the earlier Jacobean house. Inside, the interior of the main block, which has some rich plaster decoration and woodwork carving, is a complete contrast to the plain exterior. The service wing contains a fully equipped Victorian laundry. Outside, there is an attractive garden. The fine Georgian stable block is home to the horses of the Cleveland mounted police. A Model Railway group is based at the Hall in the old wing, with three permanent layouts on view.
I found that visiting the Hall was worth a rather tedious drive to reach it.