Glanmachlas is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 26 July 2000. House. 1 related planning application.
Glanmachlas
- WRENN ID
- waning-cloister-fern
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 26 July 2000
- Type
- House
- Address
- Glanmachlas, Llanegryn, Tywyn, Gwynedd, LL36 9UF
- OS grid reference
- SH 613 059
- Coordinates
- 52.63333, -4.0499
- Source
- Cadw listing
Description
Glanmachlas is a house dating from the 18th century, constructed of rock-faced stone with a slate roof. The main body of the house is a long range running southwest to northeast, extended by a single-bay lower block, and a cross wing of equal height at the southwest end. A porch is situated in the re-entrant angle between the main range and the cross wing; it has a gabled design and is open to the approach pathway, featuring a glazed door in a Gothic style. The windows are timber, with three lights, mullions, and transoms, set under expressed lintels of a light-coloured stone, and with sills of the same material. Buff brick stacks are present. A later 19th-century building is attached to the rear of the cross wing, projecting into the yard. The rear entrance is located opposite the front door in the cross wing, and a secondary service entrance is within the single-bay extension to the main range.
Local climate
Glanmachlas sits in one of the wettest parts of the UK, with an average of 1,360 mm of rain a year. This makes it wetter than 96% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 94% of listed buildings.
It experiences an average of 25 freeze-thaw cycles a year, fewer than 73% of listed buildings. Of these, 10 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 — 1 transaction since 1998
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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- Farm range on the NE side of the farmyard at Glanmachlas
- SE range of farm buildings around the large farmyard at Glanmachlas
- Barn in the farmyard at Glanmachlas
- Cemaes
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- The Clock House
- Peniarth
- Brewery/Laundry range at Peniarth
- Gate piers at the W driveway to Peniarth
- Gate piers and gate to Peniarth