The Mill House is a Grade II listed building in the Test Valley local planning authority area, England. First listed on 21 March 1984. Water mill.

The Mill House

WRENN ID
twelfth-ashlar-fen
Grade
II
Local Planning Authority
Test Valley
Constituency
Romsey and Southampton North MP: Caroline Nokes (Con)
Country
England
Date first listed
21 March 1984
Type
Water mill
Address
The Mill House, Wherwell
OS grid reference
SU 378 393
Coordinates
51.15256, -1.45983
Source
Historic England listing

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

Description

The Mill House is a water mill with an attached house, located on an ancient site. It dates from the late 18th century and has minor 20th-century extensions. The building features brick walls and a tiled roof. The house has a symmetrical south elevation with two storeys and an attic, consisting of three windows. The roof is half-hipped, higher above the mill, and has a catslide at the rear. The south elevation includes a goblet feature in the attic and an alarm gable for the mill. The walls are constructed in English bond with a flush blue band at the first floor level of the house, cambered openings on the ground floor, and a hoist door for the mill. Inside the mill, heavy timber-framing is exposed in the upper gable next to the house, while the west wall is tile-hung with scalloped bands. The windows are casements, and the doorways are plain, with the house entrance featuring a lightly-framed porch. The cut-waters and race are intact, and within the mill, there is a 19th-century metal wheel.

Local climate

The Mill House receives an average of 780 mm of rain a year. This makes it drier than 61% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 51% of listed buildings.

It experiences an average of 35 freeze-thaw cycles a year, more than 55% of listed buildings. Of these, 14 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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