Forge Farm is a Grade II listed building in the Dacorum local planning authority area, England. First listed on 19 March 1987. Farmhouse. 6 related planning applications.

Forge Farm

WRENN ID
dreaming-steel-poplar
Grade
II
Local Planning Authority
Dacorum
Constituency
Harpenden and Berkhamsted MP: Victoria Collins (LD)
Country
England
Date first listed
19 March 1987
Type
Farmhouse
Address
Forge Farm, 9, Nettleden with Potten End, HP1 3DQ
OS grid reference
TL 020 104
Coordinates
51.78346, -0.5218
Source
Historic England listing

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

Description

Forge Farm is a farmhouse that has been converted into a private house. It dates from the early 18th century and was raised to two storeys and significantly enlarged at the rear in the mid-18th century, with a 20th-century east wing added. The Gash family, who were village blacksmiths, have been documented as living here since 1756. The building is constructed of red brick, which was partly painted, and features a moulded wooden eaves cornice along with steep hipped roofs covered in old red tiles.

The house faces north and is set back from the road, with a three-window facade. It has flush 18th-century casement windows that contain rectangular leaded panes and iron plate casements. An eight-panel door is located between the first and second windows from the west, framed by a wooden doorcase. This doorcase has an open pediment supported by carved trusses with a cusped cross-member. Originally, the house had a single-storey end-chimneys plan, which was altered by the addition of another storey and a parallel rear wing that includes a staircase, a cellar, and a low dairy situated in the southwest half underground, with a low pantry above it on the ground floor. A straight joint on the west end indicates where the extension was made.

Local climate

Forge Farm sits in a drier-than-average part of the UK, with an average of 730 mm of rain a year. This makes it drier than 78% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 77% of listed buildings.

It experiences an average of 36 freeze-thaw cycles a year, more than 64% of listed buildings. Of these, 17 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 — 4 transactions since 2002
  • Related listed building consents — 6 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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Nearby listed buildings

  1. Barn and Stable Attached at Number 9 (Forge Farm) Grade II 17 m
  2. 7/8 Grade II 59 m
  3. Church of St Lawrence Grade II* 67 m
  4. Pipers Cottage Grade II 87 m
  5. Church House Grade II 101 m
  6. Nettleden House Grade II 113 m
  7. Numbers 15, 17 (Pigtle Cottage), and 18 Grade II 119 m
  8. Pipers Forge Grade II 136 m
  9. Shepherd's Cottage Grade II 673 m
  10. Little Manor Grade II 711 m