Darnells Barn is a Grade II listed building in the Hertsmere local planning authority area, England. First listed on 11 December 1973. Barn. 1 related planning application.

Darnells Barn

WRENN ID
hollow-bronze-peregrine
Grade
II
Local Planning Authority
Hertsmere
Constituency
Hertsmere MP: Sir Oliver Dowden (Con)
Country
England
Date first listed
11 December 1973
Type
Barn
Address
Darnells Barn, 5, Watford Road, Aldenham, WD7 8LA
OS grid reference
TQ 160 998
Coordinates
51.68564, -0.32259
Source
Historic England listing

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

Description

Darnells Barn is a former barn that has been converted into a house, dating from the late 17th century to early 18th century, with alterations made in the 1970s. The structure features a timber frame that is weatherboarded and has a tiled roof. It consists of three bays and has 20th-century windows in the gable ends, along with bargeboarded gables. There is an entrance and a 20th-century link to a brick addition on the eastern side, as well as a one-storey brick shed attached to the western side. Inside, the barn has straight braces connecting jowled posts to cambered tie beams, and the roof is now ceiled with a queen post truss. A middle rail and one strut are exposed in the northeast section.

Local climate

Darnells Barn 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 89% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 87% of listed buildings.

It experiences an average of 31 freeze-thaw cycles a year, fewer than 61% of listed buildings. Of these, 15 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 — 1 transaction since 2024
  • Related listed building consents — 1 application
  • 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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