Underground passage at Radnor Lodge is a Grade II* listed building in the Richmond upon Thames local planning authority area, England. First listed on 25 June 1983. A C18 Underground passage.

Underground passage at Radnor Lodge

WRENN ID
cold-lead-winter
Grade
II*
Local Planning Authority
Richmond upon Thames
Constituency
Twickenham MP: Munira Wilson (LD)
Country
England
Date first listed
25 June 1983
Type
Underground passage
Address
Underground passage at Radnor Lodge, Radnor Road
OS grid reference
TQ 157 728
Coordinates
51.44273, -0.33543
Source
Historic England listing

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

Description

The underground passage at Radnor Lodge, dating from the 18th century, leads diagonally beneath the junction of Radnor Road and Grotto Road to the grounds of St Catherine's High School. It features an arched design with niches on either side, which are decorated with various minerals and slag-glass arranged in intricate patterns. The entrances are rustic and arched, with the entrance from Radnor Lodge being partially altered and the other entrance blocked. Additionally, the passage is bricked up halfway along its length.

Local climate

Underground passage at Radnor Lodge sits in a drier-than-average part of the UK, with an average of 720 mm of rain a year. This makes it drier than 83% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 78% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 59% of listed buildings. Of these, 14 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
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Nearby listed buildings

  1. Underground Passage in Grounds of St Catherine's High School Grade II* 25 m
  2. Ryan House Grade II 265 m
  3. Pope's Grotto in Grounds of St Catherine's High School Grade II* 269 m
  4. Summer House in Radnor Gardens Grade II 350 m
  5. Cross Deep and Coach House Grade II* 362 m
  6. Twickenham War Memorial Grade II* 379 m
  7. K6 Telephone Kiosk Junction of the Green and Heath Road Grade II 397 m
  8. Grotto or shell house in the grounds of Thames Eyot Grade II* 398 m
  9. Loggia in the grounds of Thames Eyot Grade II 405 m
  10. Holy Trinity Church Grade II 418 m