Westmill House is a Grade II* listed building in the East Hertfordshire local planning authority area, England. First listed on 24 January 1967. A Early Modern House. 3 related planning applications.

Westmill House

WRENN ID
eternal-pavement-merlin
Grade
II*
Local Planning Authority
East Hertfordshire
Constituency
North East Hertfordshire MP: Chris Hinchliff (Lab)
Country
England
Date first listed
24 January 1967
Type
House
Period
Early Modern
Address
Westmill House, Westmill Road, Thundridge, SG12 0ET
OS grid reference
TL 338 162
Coordinates
51.82928, -0.05879
Source
Historic England listing

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

Description

Westmill House is a Grade II* listed house dating from the early 17th century. It has been plastered and re-windowed in a Georgian style in 1781. The building is timber-framed and lined to resemble ashlar, topped with a steep old red tile roof that features a hip at the northwest corner. This large L-shaped house faces west and consists of two storeys, a cellar, and attics. The northern wing extends to the rear and includes a stair tower at the angle.

Inside, the principal room at the south end of the west wing has a large rear fireplace, with an external lateral chimney stack that has three diamond stalks. This room used to occupy much of the entrance hall. The parlour is located at the north end of this wing and formerly extended to the south, where there is now a study. The kitchen is situated in the northeast wing, with a service room at the eastern end. There is a chimney at the junction of the wings, and the stair in the angle features an early 17th-century balustrade that survives in the attic storey.

The north elevation retains 17th-century cross-windows and has a small bellcote next to the middle first-floor window. The formal west front showcases a moulded eaves cornice, five flush box sash windows with small panes of Crown-glass, and a central six-panel fielded door with a semi-circular fanlight featuring interesting Gothic tracery. The entrance is framed by a Tuscan doorcase with attached columns and an open triangular pediment. Additionally, there is a wall painting with a Corinthian capital in the first-floor room above the kitchen.

Local climate

Westmill House sits in a drier-than-average part of the UK, with an average of 710 mm of rain a year. This makes it drier than 88% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 84% of listed buildings.

It experiences an average of 33 freeze-thaw cycles a year, fewer than 55% of listed buildings. Of these, 16 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 — 2 transactions since 2021
  • Related listed building consents — 3 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. Westmill Grade II 27 m
  2. Garden Wall on South of Westmill House Grade II 46 m
  3. Payne's Hall Grade II 176 m
  4. Westmill Farm House Grade II 384 m
  5. The Robin Hood Public House Grade II 1.0 km
  6. Number 4 Chapmore End Grade II 1.1 km
  7. Number 2 Chapmore End Grade II 1.1 km
  8. Water Tower Grade II 1.1 km
  9. Granary at High Trees Farm Grade II 1.1 km
  10. Poles Convent (Fcj) Grade II* 1.3 km