Arwelfa is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 29 August 2003. House.

Arwelfa

WRENN ID
tattered-buttress-curlew
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
29 August 2003
Type
House
Address
Arwelfa, Llanrhaeadr-Ym-Mochnant Village, Llanrhaeadr-Ym-Mochnant, SY10 0JX
OS grid reference
SJ 123 261
Coordinates
52.82607, -3.303
Source
Cadw listing

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

Description

Arwelfa is a symmetrical pair of houses built in local brown shaley stone, dating from the 19th century. The buildings are two storeys high and feature a four-window range. They have roofs covered with small slates, which match the roof of Lloran House, and a tile ridge. A shared central stone chimney is present. The houses have 16-pane hornless-sash type windows set in exposed frames, with openings that have segmental stone arches and concrete sills. The ground and upper windows are of the same proportions, although the rhythm of the facade is interrupted by a large gap for the fireplace positions. There are modern semi-glazed doors located within lightly constructed open-fronted timber porches.

At the rear, both cottages rise to three storeys, each featuring a brick-fronted full-width rear gable. There is an additional shared rear chimney situated in the valley between the rear extensions. The rear also has 16-pane sash windows similar to those at the front, but they are taller in proportion. Flanking staircase windows, along with a basement door and window, complete the rear elevation.

Local climate

Arwelfa sits in a wetter-than-average part of the UK, with an average of 960 mm of rain a year. This makes it wetter than 75% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 61% of listed buildings.

It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 25 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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  • Detailed attributes — period, style, materials, features
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Nearby listed buildings

  1. Bodawel Grade II 4 m
  2. Lloran House Grade II 13 m
  3. 11 Waterfall Street Grade II 29 m
  4. The Waterloo Stone Grade II 62 m
  5. Bryn Tirion Grade II 82 m
  6. Haulfre Cottage and Shop ('Dragons') including railings at front. Grade II 83 m
  7. Llanrhaeadr-ym-Mochnant Bridge (partly in the Community of Llanrhaeadr-ym-Mochnant (South)) Grade II 98 m
  8. Llanrhaeadr-ym-Mochnant Bridge Grade II 100 m
  9. Capel Seion including Railings Grade II* 113 m
  10. Hanmer House including railings at front Grade II 117 m