Tregenna is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 22 May 1972. Town house.
Tregenna
- WRENN ID
- inner-bonework-jackdaw
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- St Ives MP: Andrew George (LD)
- Country
- England
- Date first listed
- 22 May 1972
- Type
- Town house
- Address
- Tregenna, 33, Church Street, Helston
- OS grid reference
- SW 658 276
- Coordinates
- 50.10258, -5.27534
- Source
- Historic England listing
Description
Tregenna is a town house built in the early 19th century. It is constructed from local granite and other rubble, featuring granite dressings such as a plinth, rusticated quoins, mid-floor strings, and shallow segmental arches. The roof is hipped and covered with asbestos slate, with slightly projecting eaves and brick stacks at the ends. The building has a deep plan that includes a rear wing at right angles on the left side.
It stands three storeys tall and has a three-window range. The original windows are 12-pane hornless sashes. There is a fluted pilastered doorway on the right with a moulded entablature, panelled reveals, a six-panel door, and an overlight. On the left-hand return, there are ground- and first-floor windows, including a 4-pane hornless sash above an original 16-pane hornless sash, all set beneath a reused 17th-century chamfered lintel. The rear features original sashes, including a tall round-arched stair window with a fanlight head.
The interior has not been fully inspected, but it includes panelled window shutters and a moulded and carved ceiling cornice in the front room.
Local climate
Tregenna 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
- 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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