Round Tower is a Grade II listed building in the Portsmouth local planning authority area, England. First listed on 13 August 1999. Tower.
Round Tower
- WRENN ID
- fading-copper-cobweb
- Grade
- II
- Local Planning Authority
- Portsmouth
- Constituency
- Portsmouth South MP: Stephen Morgan (Lab)
- Country
- England
- Date first listed
- 13 August 1999
- Type
- Tower
- Address
- Round Tower, Circular Road, City of Portsmouth
- OS grid reference
- SU 639 013
- Coordinates
- 50.80856, -1.09433
- Source
- Historic England listing
Description
The Round Tower is a Grade II listed structure that is part of the dockyard sea defence wall and now serves as naval accommodation. It was built between 1843 and 1848 under the direction of Captain H James of the Royal Engineers and was dismantled and re-erected in its current position in 1867. The tower is constructed of ashlar and features a circular design with three stages. The lower stage is battered and includes both rectangular and round-arched openings. It has a machicolated band that rises over a round archway on the eastern side, as well as a machicolated parapet with roll-moulded coping. Originally, the tower was located to the north-west of the present No. 15 dock.
Local climate
Round Tower receives an average of 810 mm of rain a year. This makes it drier than 52% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 77% of listed buildings.
It experiences an average of 19 freeze-thaw cycles a year, fewer than 79% of listed buildings. Of these, 8 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.
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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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