Mount Pleasant Blockhouse is a Grade II listed building in the Plymouth local planning authority area, England. First listed on 25 January 1954. A Georgian Gun battery.

Mount Pleasant Blockhouse

WRENN ID
drifting-beam-spring
Grade
II
Local Planning Authority
Plymouth
Constituency
Plymouth Sutton and Devonport MP: Luke Pollard (Lab)
Country
England
Date first listed
25 January 1954
Type
Gun battery
Period
Georgian
Address
Mount Pleasant Blockhouse, Masterman Road, City of Plymouth
OS grid reference
SX 459 557
Coordinates
50.38153, -4.16832
Source
Historic England listing

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

Description

Mount Pleasant Blockhouse is a gun battery built in the mid-18th century to defend Plymouth Dock, now known as Devonport Docks. Locally referred to as the Pattypan, it features brick walls and granite flags for paving. The structure has an overall square plan with a central sunken area and splayed corners. The gun platform is accessed by two ramps flanking the entrance and by two flights of steps, with splayed gun positions on two sides. The blockhouse is situated in a prominent location at the center of a public recreation area, which is surrounded by a late 19th-century housing estate.

Local climate

Mount Pleasant Blockhouse sits in a wetter-than-average part of the UK, with an average of 990 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 89% of listed buildings.

It experiences an average of 9 freeze-thaw cycles a year, fewer than 91% of listed buildings. Of these, 3 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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