Ty'n y Twll is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 4 November 1999. House. 1 related planning application.
Ty'n y Twll
- WRENN ID
- standing-frieze-wren
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 4 November 1999
- Type
- House
- Address
- Ty'n y Twll, Dinas Mawddwy, Machynlleth, Mawddwy, Gwynedd, SY20 9JG
- OS grid reference
- SH 856 184
- Coordinates
- 52.75129, -3.69503
- Source
- Cadw listing
Description
Ty'n y Twll is a farmhouse, built of coursed rubble with a slate roof, featuring a rooflight and a large gable stack at the north end. The house dates to the 18th century and has a symmetrical two-bay frontage, extending to the right as an open-fronted cart shed. The central entrance has a boarded door set back within the wall thickness. Small-paned windows are located on both floors to either side of the door, with an additional window above the entrance. The cart shed to the right has a cambered timber lintel, with a granary situated above it, accessible by an external stone staircase at the gable end. A two-storey, one-bay rear service wing, seemingly contemporary with the main house, is located to the left, featuring a door and two-light windows on each floor, along with a gable stack.
Inside, the layout includes a living room on the left, a central stair hall, and a parlour originally without heating, positioned on the right.
Local climate
Ty'n y Twll sits in one of the wettest parts of the UK, with an average of 1,250 mm of rain a year. This makes it wetter than 93% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 87% of listed buildings.
It experiences an average of 53 freeze-thaw cycles a year, more than 93% 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 — 2 transactions since 2013
- 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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