Porthtown House is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 31 October 1988. Farmhouse. 2 related planning applications.
Porthtown House
- WRENN ID
- hushed-casement-mint
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- Camborne and Redruth MP: Perran Moon (Lab)
- Country
- England
- Date first listed
- 31 October 1988
- Type
- Farmhouse
- Address
- Porthtown House, St. Agnes, TR4 8AS
- OS grid reference
- SW 692 469
- Coordinates
- 50.27737, -5.24027
- Source
- Historic England listing
Description
Porthtown House is a farmhouse, possibly a former account house associated with Tywarnhaile Mine, dating from around the 1840s. It features walls made of killas rubble with granite dressings and a dry Delabole slate hipped roof. A 20th-century rebuilt brick chimney is located on the left-hand side, and it has cast-iron ogee gutters. The building has a double-depth plan, with two rooms at the front flanking a central entrance hall that leads to a stair hall situated between two rear service rooms. There are service lean-tos that are slightly set back on either side. The exterior is symmetrical with a three-window front and a central doorway, which contains the original six-panel door with an overlight. The original 16-pane hornless sash windows are present, and all openings are spanned by granite lintels. The interior has not been inspected.
Local climate
Porthtown House receives an average of 920 mm of rain a year. This makes it wetter than 70% 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 4 freeze-thaw cycles a year, fewer than 98% of listed buildings. Of these, 2 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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- No EPC on record for this property
- Sale history — 2 transactions since 2001
- Related listed building consents — 2 applications
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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