Hill House is a Grade II listed building in the Hertsmere local planning authority area, England. First listed on 3 February 1950. Mansion. 3 related planning applications.

Hill House

WRENN ID
veiled-step-burdock
Grade
II
Local Planning Authority
Hertsmere
Constituency
Hertsmere MP: Sir Oliver Dowden (Con)
Country
England
Date first listed
3 February 1950
Type
Mansion
Address
Hill House, Elstree Hill South, Elstree and Borehamwood, WD6 3DE
OS grid reference
TQ 177 950
Coordinates
51.64226, -0.29978
Source
Historic England listing

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

Description

Hill House is an 18th-century red-brick mansion that has undergone many additions. The main block, dating from the mid-18th century, features two storeys and has a tiled mansard roof with three dormers behind a parapet. It has two full-height flanking bays with three windows each, and a central Venetian window on the first floor. The ground floor has a central door flanked by windows, which are now covered by a conservatory that fills the space between the bays.

To the left is a three-window, two-storey-and-dormer wing of the same period, along with a late 18th-century or early 19th-century three-storey wing beyond it. On the right, there is a lower, possibly earlier, long two-storey wing with a steep pitched roof and irregularly spaced windows. Beyond this wing is a 19th-century cottage and sheds. Most of the window glazing is modern, except for the late 18th-century wing. Behind this wing stands a taller, three-storey block from the 19th century. The building was recently purchased by Oliver Borthwick to serve as the Memorial "Morning Post" Home. It was previously listed in the London Borough of Barnet.

Local climate

Hill House sits in one of the driest parts of the UK, with an average of 690 mm of rain a year. This makes it drier than 97% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 94% of listed buildings.

It experiences an average of 29 freeze-thaw cycles a year, fewer than 67% of listed buildings. Of these, 13 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • No sale records on file
  • 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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