Treva House is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 9 October 1987. House.

Treva House

WRENN ID
grey-ashlar-tallow
Grade
II
Local Planning Authority
Cornwall
Constituency
St Ives MP: Andrew George (LD)
Country
England
Date first listed
9 October 1987
Type
House
Address
Treva House, West End, Marazion
OS grid reference
SW 517 306
Coordinates
50.12361, -5.47434
Source
Historic England listing

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

Description

Treva House is a house from the 18th century, likely refronted in the 19th century. It features a granite ashlar front, while the rest of the building is made of stucco and rubble. The roof is made of grouted scantle slate and is hipped at both the front and rear. There are tall brick chimneys from the late 19th century on the side walls. The layout consists of two rooms deep, with a large reception room at the front, an axial passage behind, and probably two rooms at the rear. The front is in a classical style, which may have been added in the 19th century.

The exterior is two storeys high and has a symmetrical two-window south-west front without a doorway. It features a plinth, rusticated chamfered quoins, keyed flat arches with projecting keystones, a first-floor sill band, and a parapet with an entablature of band and cornice topped with a blocking course. The windows are late 19th or 20th century 16-pane horned sashes, and there are 20th century boarded external shutters. The interior has not been inspected.

Local climate

Treva House receives an average of 910 mm of rain a year. This makes it wetter than 68% 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, 1 follows 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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  • Detailed attributes — period, style, materials, features
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  • Radon risk assessment
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