Mill House and Tanhouse Farmhouse J R Swanston Plant and Engineer (Longford) Limited is a Grade II listed building in the Slough local planning authority area, England. First listed on 26 April 1985. House, farmhouse.

Mill House and Tanhouse Farmhouse J R Swanston Plant and Engineer (Longford) Limited

WRENN ID
nether-timber-lichen
Grade
II
Local Planning Authority
Slough
Constituency
Windsor MP: Jack Rankin (Con)
Country
England
Date first listed
26 April 1985
Type
House, farmhouse
Address
Mill House and Tanhouse Farmhouse J R Swanston Plant and Engineer (Longford) Limited, Mill Street, Colnbrook with Poyle
OS grid reference
TQ 028 771
Coordinates
51.48398, -0.52024
Source
Historic England listing

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

Description

Mill House and Tanhouse Farmhouse, dating from the 17th and 18th centuries, are located on Mill Street in Colnbrook. The buildings are timber-framed at the rear and feature painted brickwork. They are arranged in an L-plan, with a long wing facing the road, and have a colour-washed brick exterior topped with an old tile roof.

The road-facing section on the left is from the early 18th century and has two storeys. The first floor features three flush sash windows with glazing bars and a floor band, while the ground floor has four sash windows and a door with a timber hood. The right-hand section, dating from the 17th century, has a stuccoed first floor with two sliding casements. The ground floor includes one sliding casement, a modern door, and two three-light windows. The garden front is also stuccoed, with two storeys that contain casement and sash windows.

Local climate

Mill House and Tanhouse Farmhouse J R Swanston Plant and Engineer (Longford) Limited sits in a drier-than-average part of the UK, with an average of 700 mm of rain a year. This makes it drier than 89% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 83% of listed buildings.

It experiences an average of 29 freeze-thaw cycles a year, fewer than 68% of listed buildings. Of these, 12 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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  • No sale records on file
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  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Barn at Tanhouse Farm to South East of the Farmhouse Grade II 57 m
  2. Old School House Grade II 100 m
  3. 1, 2 and 3, Park Street Grade II 127 m
  4. Former School (Now Colnbrook Youth Centre) Grade II 129 m
  5. Church of St Thomas Grade II 131 m
  6. Aberdeen House Grade II 143 m
  7. Fairmead and the Haven Grade II 144 m
  8. Park House and Ye Olde George Public House Grade II 144 m
  9. Abington Grade II 154 m
  10. Star and Garter Public House Grade II 159 m