Treblok is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 30 May 1967. House. 3 related planning applications.

Treblok

WRENN ID
over-spindle-linden
Grade
II
Local Planning Authority
Cornwall
Constituency
Truro and Falmouth MP: Jayne Kirkham (Lab)
Country
England
Date first listed
30 May 1967
Type
House
Address
Treblok, 1 and 3, Chapel Terrace, St. Just-In-Roseland, TR2 5BH
OS grid reference
SW 846 331
Coordinates
50.15885, -5.016
Source
Historic England listing

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

Description

A pair of houses, possibly dating from the late 18th century, originally a bake house, located on Chapel Terrace in St Just in Roseland. The ground floor is painted brick, while the upper levels are clad in slate. The roof is half-hipped, covered with asbestos slate, and features painted brick chimneys positioned over splayed external rubble breasts on the side walls. The houses have a two-room layout, double-depth plans, and two storeys over a basement, with an attic space. Both the north and south fronts have two windows and feature paired wooden box porches with console brackets. The north front retains original 16-pane, two-light casement windows, with slate sills. Later raking roof dormers have been added. The interior of Treblok remains largely unchanged, exhibiting delicate ovolo mouldings to the ground floor beams, original floors, and the original roof structure featuring pegged truss apexes and nailed collars. Numerous original two-panel doors are also present. A substantial brick domed oven remains in the basement.

Local climate

Treblok 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.
  • Sale history — 3 transactions since 1999
  • 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
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