Odiham Castle is a Grade I listed building in the Hart local planning authority area, England. First listed on 24 November 1961. A Medieval Castle.

Odiham Castle

WRENN ID
floating-transept-hyssop
Grade
I
Local Planning Authority
Hart
Constituency
North East Hampshire MP: Alex Brewer (LD)
Country
England
Date first listed
24 November 1961
Type
Castle
Period
Medieval
OS grid reference
SU 725 518
Coordinates
51.26141, -0.96151
Source
Historic England listing

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

Description

Odiham Castle is a partly-surviving octagonal keep, believed to have been built by King John. It is situated within a moated area and features flint walling with stone dressings, rising up to three storeys. The site is designated as a Scheduled Ancient Monument.

Local climate

Odiham Castle receives an average of 750 mm of rain a year. This makes it drier than 70% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 62% of listed buildings.

It experiences an average of 33 freeze-thaw cycles a year, fewer than 53% of listed buildings. Of these, 14 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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  • 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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