Erfyl House is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 20 March 1996. House.

Erfyl House

WRENN ID
fallow-cupola-willow
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
20 March 1996
Type
House
Address
Erfyl House, Llanerfyl, SY21 0EG
OS grid reference
SJ 034 097
Coordinates
52.67678, -3.42999
Source
Cadw listing

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

Description

Erfyl House is a mid-19th century building, constructed around 1830-1840, located at a slight angle to the main road in front of the Church. Originally marked on the Tithe Map as ‘house in 3 dwellings’, it has since been converted into a single residence.

The house is two storeys high and consists of western and central sections that were likely originally three bays each, along with a smaller eastern section that may have served as a service wing. The exterior features white-painted brickwork, with the western gable showing the shadow of a lower range in red brick and tile hanging above. The eastern range is built of brick with a tin roof, while the rear elevation is constructed of rubble masonry. The roof is covered with asbestos slate and features three chimney stacks made of blue brick.

The western and central houses each have a two-unit plan with a central doorway and a chimney at the western end. Each section has two upper-storey windows beneath the eaves, which are tripartite, made of cast iron, with 24 panes and a central opening light. On the ground floor, the central house has two similar wooden windows flanking its doorway, while the former western house has two modern casement windows, each with 16 panes. The ground floor windows have flat arches with gauged brick heads. The central house features a modern four-panelled, half-lit door with an overlight, and the western house has a substantial added porch with a similar door.

The eastern house, which is at right angles to the main range, has a doorway at the eastern end. It features wooden casement windows under arched heads, along with small casement windows with eight panes each at the rear. A visible butt joint indicates that this eastern section is a later addition.

Erfyl House is included in the listing as it retains the character of a mid-19th century terrace and is part of a group of buildings at the center of the village.

Local climate

Erfyl House sits in a wetter-than-average part of the UK, with an average of 1,030 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.

It experiences an average of 42 freeze-thaw cycles a year, more than 80% of listed buildings. Of these, 22 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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  • No EPC on record for this property
  • Sale history — 5 transactions since 1999
  • No related consent applications matched
  • 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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  2. Water Standpost / Fire Hydrant Grade II 45 m
  3. Bryn Erfyl and Tynllan Grade II 53 m
  4. Railings and Gates to Caerfynnon Grade II 57 m
  5. Caerfynnon Grade II 58 m
  6. Milestone Grade II 86 m
  7. Pont Llanerfyl Grade II 254 m
  8. Cowhouse and Stable at Maes-gwyn Grade II 482 m
  9. Maes-gwyn Grade II 497 m
  10. The Miller's Cottage Grade II 1.2 km