Castle Mill Bridge is a Grade II listed building in the Exmoor National Park local planning authority area, England. First listed on 4 August 1983. A C18 Bridge.

Castle Mill Bridge

WRENN ID
under-groin-moon
Grade
II
Local Planning Authority
Exmoor National Park
Constituency
Tiverton and Minehead MP: Rachel Gilmour (LD)
Country
England
Date first listed
4 August 1983
Type
Bridge
Address
Castle Mill Bridge, Mill Lane, Dunster, Somerset
OS grid reference
SS 991 433
Coordinates
51.18029, -3.44398
Source
Historic England listing

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

Description

Castle Mill Bridge is a picturesque bridge built in the mid to late 18th century by H. F. Luttrell of Dunster Castle to replace a medieval mill bridge over the River Avill. The bridge is constructed of brick and stone and features two pointed arches. The south side has a low brick parapet, while the north side has a raised but damaged parapet. The bridge also showcases rock-faced rusticated voussoirs.

Local climate

Castle Mill Bridge sits in a wetter-than-average part of the UK, with an average of 1,130 mm of rain a year. This makes it wetter than 88% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 10 freeze-thaw cycles a year, fewer than 90% of listed buildings. Of these, 5 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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Nearby listed buildings

  1. Castle Mill and Attached Gateway and Gate Grade II* 55 m
  2. 7, Mill Lane Grade II 74 m
  3. Dunster Castle and Gatehouse Grade I 161 m
  4. Rose Cottage Grade II 198 m
  5. Stables, Dunster Castle Grade II* 234 m
  6. The Oval Grade II 238 m
  7. Fair View Grade II 248 m
  8. 9, West Street Grade II 251 m
  9. Westbury Grade II 255 m
  10. Carmel Grade II 258 m