Bodyddan Isaf is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 22 March 1993. House.

Bodyddan Isaf

WRENN ID
solemn-mortar-wren
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
22 March 1993
Type
House
Address
Bodyddan Isaf, Cwm Nant Fyllon, Llanfyllin
OS grid reference
SJ 119 216
Coordinates
52.78478, -3.30697
Source
Cadw listing

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

Description

Bodyddan Isaf is a single-storey building with attics, featuring a slate roof and a rendered chimney on the left, along with rectangular brick chimneys at the centre and right. It has two gable dormers that contain small-pane casement windows set along the eaves. The main entrance is marked by a door beneath a gabled open porch, with a casement window on each side. To the left, there is an additional doorway accompanied by a small-pane window. A projecting chimney is located in the left gable, and there is a rear crosswing to the left.

Inside, a large fireplace aligned with the entrance doorway creates a lobby area. The room to the left includes a fireplace with a massive beam and remnants of a post and panel partition, which has a dais canopy beam above it. The room beyond features a flagged floor at a higher level and has a cross-beam with mortices indicating a lost partition. The upper floor reveals exposed timbers from one cruck and one box-frame truss.

Local climate

Bodyddan Isaf 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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