Thirston House with Attached Outbuildings and Courtyard Wall

Thirston House, built around 1820 by the architect John Dobson for the Newton family, is a house with attached outbuildings and a courtyard wall. It was altered and remodelled internally in 1902. The house is constructed of ashlar stone, with a rear wing and outbuildings of squared stone, and has a grey slate roof. It is arranged in an L-shape, including a stable wing that encloses three sides of a rear courtyard.

The south front, the main entrance, is two storeys high and has four bays. A raised platform with a central Tuscan porch, featuring a two-column front and panelled double doors, is accessed by three steps. The flanking openings were filled with glazing in 1902. The windows are 12-pane sash windows. The roof is hipped with two stepped and corniced ridge stacks. The left return has four bays with similar windows, alongside a conservatory added to the left. A yard wall with square gate piers connects to the end of the stable wing. The right return (garden front) features four bays and a one-story projection added in 1902. The rear wing is slightly set back and has four irregular bays, with a first floor added in 1902. The rear elevation of the stable wing displays a boarded loading door with a reused lintel inscribed 'TD 1728'.

The interior predominantly dates from 1902, including panelled entrance hall with an open-well staircase and a decorative plaster ceiling.