Mill House is a Grade II listed building in the Northumberland National Park local planning authority area, England. House.

Mill House

WRENN ID
brooding-slate-wind
Grade
II
Local Planning Authority
Northumberland National Park
Constituency
North Northumberland MP: David Smith (Lab)
Country
England
Type
House
Address
Mill House, Harbottle
OS grid reference
NT 955 027
Coordinates
55.31843, -2.07177
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Mill House is a former mill that has been converted into a house, with origins dating back to the medieval period and the 19th century. It features squared stone construction and a Welsh slate roof. The lower storey is constructed entirely of masonry from the 13th or 14th century, although it is unclear whether this stonework is original to the site or taken from the nearby Holystone nunnery.

The building has two storeys and consists of three bays, with a single-storey, one-bay extension on the right side. A 20th-century central porch incorporates parts of two 14th-century grave covers. The windows are four-pane sash types, and the kitchen window in the single-storey section to the right includes a re-used 14th-century window head with cusping, along with the base of a two-light window repurposed as the sill.

The roof is gabled with flat coping and features corniced end stacks. The rear wall is predominantly made of solid medieval masonry, and the exposed roof timbers appear to date from the 18th century.

Local climate

Mill House receives an average of 840 mm of rain a year. This makes it wetter than 57% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 98% of listed buildings.

It experiences an average of 50 freeze-thaw cycles a year, more than 92% of listed buildings. Of these, 31 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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