Tregarthen Cottage is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 9 October 1987. House. 1 related planning application.

Tregarthen Cottage

WRENN ID
deep-stronghold-moss
Grade
II
Local Planning Authority
Cornwall
Constituency
St Ives MP: Andrew George (LD)
Country
England
Date first listed
9 October 1987
Type
House
Address
Tregarthen Cottage, Turnpike Hill, Marazion, TR17 0AY
OS grid reference
SW 522 307
Coordinates
50.12481, -5.46792
Source
Historic England listing

Also on this page: sale history · EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Tregarthen Cottage is an 18th-century house, which was later used as two separate dwellings. It is constructed of painted granite rubble with granite dressings and wooden lintels, and has an asbestos slate roof with brick chimneys at the gable ends. The house follows an L-shaped three-room plan, with a fireplace in each room. An 18th-century staircase is located to the right of the main doorway. A 19th-century staircase occupies the wall of the later divided front wing on the right-hand side. The exterior features two storeys, with the inner angle of the L exhibiting north and east fronts, each with two first-floor windows and doorways facing the angle. There are 20th-century windows on the north front and 12-pane two-light casement windows on the east front. The main part of the interior has had its floor replaced, but one reused 18th-century bowtell-moulded beam remains. The 18th-century staircase has a closed string and column-turned balusters. The wing contains a 19th-century staircase and moulded beams dating to the 19th century.

Local climate

Tregarthen Cottage 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 2 transactions since 2016
  • Related listed building consents — 1 application
  • 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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