Former Saw Mills is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 21 October 1998. Industrial building. 3 related planning applications.

Former Saw Mills

WRENN ID
distant-bronze-thrush
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
21 October 1998
Type
Industrial building
Address
Former Saw Mills, Glanusk Park, Llangattock, Powys, NP8 1LP
OS grid reference
SO 190 195
Coordinates
51.86884, -3.17652
Source
Cadw listing

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

Description

The Former Saw Mills is a Grade II listed building consisting of three adjoining parallel ranges, all single storey. It is built from snecked masonry with stone dressings and features slate roofs with moulded barge boards. The building is notable for its wide doorways that are set under segmental arches with voussoirs, typically fitted with double planked doors. Tall cast iron windows with flat stone lintels and sills are present, featuring 24 panes with opening lights. The north and south walls have three spans, and each gable includes an oculus with radial glazing. The arrangement of doors and windows is irregular; the gable ends of the west range each have two doorways, while the other gable ends feature one doorway and either one or two windows. The east wall has double doors to the left, followed by five windows, a door, and then three additional windows. The west side has a roughly central boarded doorway, and to the left, there is a very wide full-height opening with sliding corrugated iron doors, beyond which are two windows.

Inside, the central range is completely open and consists of 12 bays supported by simple queen post trusses. The concrete floor shows impressions for machine bases, and there is a bearing box attached to the south end of the east wall, indicated by oil stains. The west wall has been partially cut away and replaced with cast iron columns and beams, along with brick jambs. Iron rails run east-west through the west range, facing the wide external entrance with sliding doors. The north and south ends of this range are partitioned off by stone walls and were not accessed. The east range is divided and primarily used as workshops; the north half contains two rooms, at least one of which was previously converted into an office. The south half has a north-south partition wall with a loft above.

Local climate

Former Saw Mills sits in a wetter-than-average part of the UK, with an average of 1,100 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 74% of listed buildings.

It experiences an average of 54 freeze-thaw cycles a year, more than 94% of listed buildings. Of these, 30 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.
  • No sale records on file
  • Related listed building consents — 3 applications
  • 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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