Mr Grenfell's Workshop is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 7 February 1974. Workshop.
Mr Grenfell's Workshop
- WRENN ID
- dusk-marble-jet
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- St Ives MP: Andrew George (LD)
- Country
- England
- Date first listed
- 7 February 1974
- Type
- Workshop
- Address
- Mr Grenfell's Workshop, Old Quay Street, Penzance
- OS grid reference
- SW 469 262
- Coordinates
- 50.08208, -5.53904
- Source
- Historic England listing
Description
Mr Grenfell's Workshop is likely from the early 19th century and constructed of granite rubble. It features a slurried slate roof that slopes down towards the road. The end of the building is mostly covered with weatherboarding. On the ground floor, there are double doors, and on the first floor, there is a loft door flanked by multi-pane fixed-light windows. This building is included for its group value alongside Portland House, Trelawny, Mr Gartrell's Workshop, No 6, and Wharf House on the Wharf.
Local climate
Mr Grenfell's Workshop sits in a wetter-than-average part of the UK, with an average of 970 mm of rain a year. This makes it wetter than 75% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.
It experiences an average of 1 freeze-thaw cycle a year, fewer than 99% of listed buildings. 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
- No related consent applications matched
- 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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