Numbers 18 and 20 (Dormer House) is a Grade II listed building in the South Oxfordshire local planning authority area, England. First listed on 4 November 1986. House, office. 2 related planning applications.

Numbers 18 and 20 (Dormer House)

WRENN ID
sheer-belfry-root
Grade
II
Local Planning Authority
South Oxfordshire
Constituency
Didcot and Wantage MP: Olly Glover (LD)
Country
England
Date first listed
4 November 1986
Type
House, office
Address
Numbers 18 and 20 (Dormer House), Blewbury Road, East Hagbourne, OX11 9LF
OS grid reference
SU 532 884
Coordinates
51.59238, -1.23282
Source
Historic England listing

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

Description

Numbers 18 and 20, known as Dormer House, is a house that now serves as both a residence and an office. It dates from the mid-17th century and features a rendered exterior, likely built on a timber frame, with an old plain-tile roof. The building has a brick chimney stack on the left side and a ridge stack positioned to the right of the center. It is a single-storey structure with an attic and has a three-window range.

The entrance is marked by a 20th-century panelled door located to the left of the center. To the left of the door, there is a three-light wooden casement window, while the center features a 20th-century angled bay window topped with a hipped plain-tile roof. To the right, there is a four-light wooden casement window. The house is adorned with three gabled dormers. Inside, there is a straight flight staircase and a queen-post roof. The central area of the ground floor has a chamfered spine beam with decorative end stops, an open fireplace, and a blocked fireplace to the right.

Local climate

Numbers 18 and 20 (Dormer House) sits in a drier-than-average part of the UK, with an average of 720 mm of rain a year. This makes it drier than 81% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 72% of listed buildings.

It experiences an average of 36 freeze-thaw cycles a year, more than 62% 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 — 3 transactions since 1995
  • 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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