Ty Mawr is a Grade II* listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 19 November 1963. House.
Ty Mawr
- WRENN ID
- graven-column-stoat
- Grade
- II*
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 19 November 1963
- Type
- House
- Address
- Ty Mawr, Llanigon, Powys
- OS grid reference
- SO 214 399
- Coordinates
- 52.05243, -3.14649
- Source
- Cadw listing
Description
Ty Mawr is a 17th-century building facing southwest, featuring one storey with semi-attics, roughcast walls, and slate roofs. The rear reveals some visible timber-framing with squarish panels and a small diagonal brace between the corner-post and roof-plate. The continuous outshuts at the back have artificial stone-slate roofs, and there is one modern dormer window in the main roof. A large stone chimneystack at the back of the hall shows significant repairs.
Inside, the left-hand (northwest) room has a chamfered ceiling beam with pyramidal stops and is accessed through an original partition with a pair of doorways that have arched heads, one of which is blocked. This room retains one original door with an arched head. The original hall is entered through a similar partition, which includes one of a pair of very wide arched openings; the other opening is in a section that has been removed. The staircase dates from the early to mid-18th century and features turned oak balusters. The hall ceiling has been inserted, supported by longitudinal beams on brackets (all defaced) against the parlour and on a cross-beam held up by posts. The inner room remains partitioned off and shows visible timber-framing in its rear wall. It has chamfered ceiling beams inserted on edge upon brackets, with one beam retaining its quadruple roll mouldings. The upper storey of the framing is said to have a blocked scratch-moulded window.
Local climate
Ty Mawr receives an average of 900 mm of rain a year. This makes it wetter than 67% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 54% of listed buildings.
It experiences an average of 52 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 29 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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- 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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