1 Highgate Terrace is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 10 April 1989. Cottage. 1 related planning application.

1 Highgate Terrace

WRENN ID
proud-outpost-torch
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
10 April 1989
Type
Cottage
Address
1 Highgate Terrace, 1 Penygreen Road, Llanidloes, SY18 6AH
OS grid reference
SN 952 845
Coordinates
52.44887, -3.54274
Source
Cadw listing

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

Description

The building at 1 Highgate Terrace comprises a group of four three-story, one-window red brick cottages, with a two-story, two-window former gaol attached to the right-hand end. The cottages have renewed slate roofs, boarded eaves, and modern brick chimney stacks, with a black painted plinth to the former gaol. They feature small-pane sash windows with voussoirs, with 15 panes on the second floor and 20 panes on the first and ground floors. Camber-headed entrances have boarded doors. Between numbers 3 and 4 is a round-arched entry leading to a tunnel passage, now fitted with a metal door and a plain fanlight.

The former gaol has an old slate roof with a brick stack and part slate hanging. It contains a 15-pane sash window on the first floor and a 20-pane sash window below, accompanied by a similar entrance. The left end of the gaol is largely shale-covered, with the upper section rendered where a former weaving loft door was blocked. The right gable end has a pebbledash finish, and the gable end of the gaol is slate-hung, with an attached boarded lean-to shed. A colourwashed passage leads to a shale rear elevation with brick dressings. The rear of the gaol is constructed with shale above rubble, and features small-pane metal-frame windows.

The second floor runs the length of the building and was formerly used as a weaving loft. Numbers 2 and 3 have been combined into a single residence. The gaol’s interior retains two cells, each with barred windows, which were used to detain Chartists. Policemen’s accommodation is located above the cells. Included are brick privy lean-tos attached to numbers 1 and 3, a later one to number 4, and small cellar windows. Boarded loft openings conceal windows.

Local climate

1 Highgate Terrace sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.

It experiences an average of 53 freeze-thaw cycles a year, more than 94% of listed buildings. Of these, 32 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 — 7 transactions since 1995
  • 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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