Cynffyrch is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 27 May 2005. House.

Cynffyrch

WRENN ID
scarred-flagstone-hemlock
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
27 May 2005
Type
House
Address
Cynffyrch, Derwenlas, Cadfarch
OS grid reference
SN 719 987
Coordinates
52.57168, -3.89073
Source
Cadw listing

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

Description

Cynffyrch is a house made up of two ranges that are positioned at right angles to each other. The 18th-century range is a two-unit structure with two low storeys and features a lobby entrance at the left end. It is built from white-washed rubble stone and has a slate roof with stone end stacks. A gabled stone porch was added after 1979, which includes a boarded door with small-pane glazing. To the right of the porch, there are two late 20th-century plain-glazed wooden sash windows with stone lintels and slate sills, which replaced earlier four-pane sashes. Similar windows are aligned on the upper storey, just below the eaves. There is a former 19th-century dairy adjoining to the right, which is now used as a garage.

The 19th-century block was added at right angles and faces north. This symmetrical structure has two storeys and three windows, also made from whitewashed rubble stone and topped with a slate roof and stone end stacks. It features a central entrance with a late 20th-century gabled stone porch and a glazed wooden front door that faces west. The windows are 12-pane horned sashes set under segmental brick heads, which may have been renewed. A small top-hung light has been inserted to the right of the west gable end. The rear of the building was not seen during the resurvey.

Local climate

Cynffyrch sits in one of the wettest parts of the UK, with an average of 1,320 mm of rain a year. This makes it wetter than 95% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.

It experiences an average of 31 freeze-thaw cycles a year, fewer than 62% of listed buildings. Of these, 15 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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