Penwarne House is a Grade II* listed building in the Cornwall local planning authority area, England. First listed on 10 July 1957. County house. 3 related planning applications.
Penwarne House
- WRENN ID
- upper-shingle-holly
- Grade
- II*
- Local Planning Authority
- Cornwall
- Constituency
- Camborne and Redruth MP: Perran Moon (Lab)
- Country
- England
- Date first listed
- 10 July 1957
- Type
- County house
- Address
- Penwarne House, Mawnan, TR11 5PH
- OS grid reference
- SW 773 302
- Coordinates
- 50.13063, -5.11655
- Source
- Historic England listing
Description
Penwarne House is a country house dating to the late 18th century, with extensions added around the mid-19th century. The main house is stuccoed, with a granite ashlar plinth at the front, and has a dry Delabole slate roof, hipped at the rear with two hipped roof dormers. A stuccoed parapet runs along the front, and the chimney stacks are stuccoed with modillioned cornices. The plan is symmetrical, forming a U-shape and incorporating a lower, one-room-width wing to the right, with 20th-century service rooms behind.
The exterior is two storeys plus a basement, with a five-bay south-east front featuring rusticated stucco quoins, dentilled moulded parapet cornices, and an ashlar plinth. The central bay projects forward, topped by a triangular pediment. The original six-panel front door, with fielded panels and a fanlight, is set within a distyle Ionic porch with an open triangular pediment, approached by five granite steps. The wing to the right is set back slightly, with a similar parapet and a hipped roof with wide eaves and a central two-light window piercing the parapet. Ground floor windows have moulded jambs with consoles supporting a segmentally-headed pediment; a matching window is present to the right-hand return wall. Original 12-pane hornless sash windows with thin glazing bars are found throughout the front elevation, with internal shutters to the ground floor. Other elevations also retain original windows, including tripartite sashes to the rear wings. A round-headed stair window has marginal panes and may be of a later date. Slatehanging is present on the rear wall between the wings. The rear courtyard features blind windows in the wing walls, with hipped roof dormers above.
Inside, many original 18th and 19th-century features remain, including mahogany panelled doors, original door furniture, plaster ceiling cornices with dentils in the reception rooms, an elliptical archway between the hall and stair hall, and an open-well staircase with a shaped handrail and fluted stick balusters.
Local climate
Penwarne House receives an average of 850 mm of rain a year. This makes it wetter than 59% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 84% of listed buildings.
It experiences an average of 7 freeze-thaw cycles a year, fewer than 95% of listed buildings. Of these, 3 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
- Related listed building consents — 3 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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