Postern Forge House is a Grade II listed building in the Tonbridge and Malling local planning authority area, England. First listed on 20 January 1972. House. 2 related planning applications.

Postern Forge House

WRENN ID
fallen-sill-sage
Grade
II
Local Planning Authority
Tonbridge and Malling
Constituency
Tonbridge MP: Tom Tugendhat (Con)
Country
England
Date first listed
20 January 1972
Type
House
Address
Postern Forge House, Postern Lane, TN11 0QU
OS grid reference
TQ 606 462
Coordinates
51.19261, 0.29768
Source
Historic England listing

Also on this page: sale history · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Postern Forge House is an L-shaped building that dates back to the 17th century, with parts from the late 15th century. Originally two cottages, it has been converted into one residence. The house is two storeys high and features four windows, with two window bays located in the south wing, which is short but wide. The ground floor is fronted with red brick, while tiles cover the upper part, although it is likely timber-framed underneath. The roof is tiled, with a half-hipped gable at the east end of the south wing and a smaller pointed gable on the west half. The house has casement windows. It is believed that Thomas Willard, an iron master, built the house around 1480, and it has been associated with the iron trade for many generations. A forge dam is located next to the house, and the interior features a fire ingle nook and some late 17th-century panelling.

Local climate

Postern Forge House receives an average of 750 mm of rain a year. This makes it drier than 70% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 58% of listed buildings.

It experiences an average of 30 freeze-thaw cycles a year, fewer than 63% 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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  • No EPC on record for this property
  • Sale history — 3 transactions since 1997
  • Related listed building consents — 2 applications
  • 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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