Union Castle House is a Grade II listed building in the Southampton local planning authority area, England. First listed on 8 October 1981. House.
Union Castle House
- WRENN ID
- upper-spire-rowan
- Grade
- II
- Local Planning Authority
- Southampton
- Constituency
- Southampton Itchen MP: Darren Paffey (Lab)
- Country
- England
- Date first listed
- 8 October 1981
- Type
- House
- Address
- Union Castle House, 100, Canute Road, City of Southampton
- OS grid reference
- SU 424 109
- Coordinates
- 50.89676, -1.39749
- Source
- Historic England listing
Description
Union Castle House, built in 1847 by Alfred Giles, was originally the Custom House and served in that capacity until 1902 when a new Custom House was constructed. The building is two storeys high and made of yellow brick. The elevation facing Canute Road features a 20th-century stone addition, with the central portion being slightly higher. The facade has a window arrangement of three in the center, five in the middle, and three on the ends. It has a hipped tiled roof adorned with a large wooden modillion cornice, and the central section includes a louvred lantern. The windows are sash style, with most of the glazing bars still intact, and the first-floor windows have moulded architraves and cornices above the central windows. The ground floor has a stone projection with a round-headed doorcase, flanked by lights on either side and engaged Tuscan columns that support an entablature featuring a triglyph frieze and urns. The center of the parapet is raised, and the building has end quoins and a plinth.
Local climate
Union Castle House receives an average of 830 mm of rain a year. This makes it wetter than 53% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.
It experiences an average of 18 freeze-thaw cycles a year, fewer than 82% of listed buildings. Of these, 7 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
- No sale records on file
- No related consent applications matched
- 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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