Pantglas is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 October 2005. House. 1 related planning application.
Pantglas
- WRENN ID
- final-brick-falcon
- 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 October 2005
- Type
- House
- Address
- Pantglas, Heol Senni, Maescar, Powys, LD3 8SS
- OS grid reference
- SN 933 253
- Coordinates
- 51.91617, -3.55158
- Source
- Cadw listing
Description
Pantglas is a house, likely dating to the 18th century, constructed with whitewashed roughcast walls and slate roofs. It is two storeys high with an attic. The house features whitewashed rendered end wall stacks, a stone centre ridge stack, and a large external chimney at the rear. Most of the windows have been replaced with timber-framed, 12-pane Brecon hopper windows, although some retain original timber lintels. Modern roof lights are present on the front elevation.
The five bays are irregularly spaced. The first bay contains a 12-pane window above a small window that was previously marked as a door. The second bay is separated from the first and features a larger 12-pane window over another 12-pane window, situated close to the third bay which has a 9-pane window above the main entrance, housed within a modern porch. A dripstone sits above the front door. A large stone chimney marks a division within the house, although there is no structural joint visible. The right-hand portion of the house has two 12-pane sashes above and two below, each with a dripstone. A third window was marked as blocked in 1968-9. The right end wall includes a corbelled external chimney, while the left end has an external chimneybreast above a lean-to addition.
The rear elevation has two first-floor windows and one ground-floor window, which are not aligned. A massive projecting base of rubble stone supports a tall, leaning square stack. To the left of this stack, the roofline descends slightly before continuing over a rear outshut, incorporating a large gabled dormer and a ground-floor square window. The outshut overlaps the division between the two original sections of the house, marked by the stone ridge chimney, and slightly overlaps the corner of a stair gable to the left, which includes a window on each landing level and a plain gable. The final bay retains eaves to the original line and has a single window on each floor, with a dripstone over the upper window and a hoodmould over the lower.
The entrance hall contains the back of a ground-floor fireplace and the corbelled base of a first-floor chimney. A substantial beam is supported by two stone corbels. A door leads into the main east room, which contains two original beams and previously had a fireplace on the west end; a modern fireplace is now set into the east end wall. A previously existing beam with two hollow mouldings on the east wall was removed in 1965. The staircase opens off the back wall, featuring a winding design around a square pier. A cellar staircase turns at a right angle to access a cellar with a cobbled floor and an inset drain.
A room to the left of the hall features a lateral chimney on the back wall, with a large, cambered-headed fireplace opening containing stone voussoirs. Two principal beams (a third being within the entrance hall) are supported by a stone pier. The adjacent kitchen has two beams resting on stone corbels and a large beam over an end fireplace.
The stairs open onto a landing partially under the outshut where a massive beam spans the opening. Most of the first-floor rooms have been altered with modern partitions, and a fireplace corbelled around the chimney has been blocked. New attic stairs have been constructed, leading to two attics with collar trusses – three to the east and four to the west. The trusses over the west side are larger, and the collars of the west roof trusses have been repositioned.
Local climate
Pantglas sits in one of the wettest parts of the UK, with an average of 1,410 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.
It experiences an average of 55 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 31 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 — 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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