Nantylaethdy is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 August 1998. Farm house. 1 related planning application.

Nantylaethdy

WRENN ID
winter-lime-willow
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
28 August 1998
Type
Farm house
Address
Nantylaethdy, Dyffryn Crawnon, Llangynidr, Powys, NP8 1NU
OS grid reference
SO 130 183
Coordinates
51.85715, -3.264
Source
Cadw listing

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

Description

Nantylaethdy is a one-and-a-half-storey farmhouse with a lower attached byre, built of rubble sandstone with slate roofs. The house, situated at the higher end, has a single gable-end stack. On the west side, the house features an inserted doorway that has since been blocked, a window opening illuminating the hall, and a window with two diamond mullions lighting the parlour. The rear wall on the east side has window openings with hood moulds. To the right is a gabled stair projection with a window featuring two diamond mullions, a centrally located 19th-century sash window, an opening within a half dormer, and a ground-floor window with two diamond mullions lighting a former pantry. A window is also present in the south gable end of the attic.

The byre has one window on its west side, lighting a passage to the house’s front door and formerly a doorway. At the rear are a doorway on the left and a window opening on the right, both under timber lintels. Above, a raking dormer is located right of centre, the east roof slope being made of corrugated iron.

Inside the house, there is a hall and two small inner rooms separated by a partially surviving post-and-panel partition featuring two segmental door heads. A fireplace is present with a large chamfered bressumer; to the right of the fireplace is a stone stair accessed through a doorway. The cross beams are chamfered and have run-out stops. The byre consists of four bays with upper crucks. A stone dividing wall separates the passage from the rest of the byre.

Local climate

Nantylaethdy 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 78% of listed buildings.

It experiences an average of 57 freeze-thaw cycles a year, more than 96% 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 — 5 transactions since 1997
  • 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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