Redoubt is a Grade II* listed building in the Tendring local planning authority area, England. First listed on 20 June 1972. A Modern Fortification. 1 related planning application.
Redoubt
- WRENN ID
- lesser-casement-lake
- Grade
- II*
- Local Planning Authority
- Tendring
- Constituency
- Harwich and North Essex MP: Sir Bernard Jenkin (Con)
- Country
- England
- Date first listed
- 20 June 1972
- Type
- Fortification
- Period
- Modern
- Address
- Redoubt, Main Road, Harwich, CO12 3LT
- OS grid reference
- TM 261 321
- Coordinates
- 51.94213, 1.28914
- Source
- Historic England listing
Description
The Redoubt in Harwich is a historic military structure built between 1808 and 1810, constructed from brick and granite. It features a circular design with an internal courtyard and brick vaulted chambers. Surrounding the Redoubt is a circular dry moat, which originally had a drawbridge that has since been replaced by a concrete span. Some original fittings remain, including iron railings, a hoist, and a lantern in the magazine wall. The Redoubt was designed as a bomb-proof fortification with the capability to withstand a prolonged siege. In 1861, it was remodeled but retained the same basic plan. The upper level of the structure includes batteries that were originally intended for ten 24-pounder cannons; one cannon, dating from 1865, has been excavated from the moat. The moat's revetment is made of brick.
Local climate
Redoubt sits in a drier-than-average part of the UK, with an average of 730 mm of rain a year. This makes it drier than 79% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 70% of listed buildings.
It experiences an average of 11 freeze-thaw cycles a year, fewer than 89% of listed buildings. Of these, 6 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
- Related listed building consents — 1 application
- 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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