Monument to H M Grylls is a Grade II* listed building in the Cornwall local planning authority area, England. First listed on 22 May 1972. Monument. 1 related planning application.

Monument to H M Grylls

WRENN ID
late-chancel-peregrine
Grade
II*
Local Planning Authority
Cornwall
Constituency
St Ives MP: Andrew George (LD)
Country
England
Date first listed
22 May 1972
Type
Monument
Address
Monument to H M Grylls, Monument Road, Helston, TR13 8EU
OS grid reference
SW 656 274
Coordinates
50.10045, -5.27774
Source
Historic England listing

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

Description

The Monument to H M Grylls is a memorial gateway that provides access to a bowling green on the site of a former castle. It was constructed in 1834 by George Wightwick, funded by public subscription in memory of Humphry Millet Grylls. The monument is made of granite ashlar and features a plinth, weathered buttresses, and various details, including an embattled parapet with tall crocketed pinnacles flanking the doorway. The structure has a rectangular plan and is designed in the Gothic style. Both the front and rear elevations are identical, showcasing a central four-centred arched doorway with sunk panels in the spandrels and an inscribed panel with a trefoil end above. The flanking bays contain tall trefoil-headed niches with quatrefoils above them, and a lower cornice is enriched with Tudor roses, topped by a parapet cornice over a trefoil frieze. This distinguished design provides a visually prominent end to Coinagehall Street.

Local climate

Monument to H M Grylls receives an average of 870 mm of rain a year. This makes it wetter than 63% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.

It experiences an average of 3 freeze-thaw cycles a year, fewer than 99% of listed buildings. Of these, 1 follows at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°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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Nearby listed buildings

  1. 51, Coinagehall Street Grade II 25 m
  2. 2, Monument Road Grade II 27 m
  3. No 58 and Attached Walls Grade II* 28 m
  4. Forecourt Walls and Railings to Coinagehall Grade II 28 m
  5. 3 and 4, Monument Road Grade II 35 m
  6. 49, Coinagehall Street Grade II 35 m
  7. Coinagehall Grade II 37 m
  8. Stable Building at Rear of No 58 Stable Building at Rear of No 58 Coinagehall Street Grade II 44 m
  9. 54 and 56, Coinagehall Street Grade II 46 m
  10. 52, Coinagehall Street Grade II 49 m