Ty-isaf is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 4 November 1999. House. 2 related planning applications.

Ty-isaf

WRENN ID
guardian-terrace-hazel
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-isaf, Llanymawddwy, Machynlleth, Mawddwy, Gwynedd, SY20 9AQ
OS grid reference
SH 902 189
Coordinates
52.75676, -3.62796
Source
Cadw listing

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

Description

Ty-isaf is a house with an attached village store, aligned along the road. It is constructed of coursed rubble and topped with a slate roof. The building has two storeys and two bays, with a single-storey extension for the shop on the left. The house features a boarded door on strap hinges, set within a slate slab open fronted porch that has a gabled slate roof and shaped bargeboards. Each floor has two-light 4-pane casement windows, and there is an additional window above the porch. The ground floor openings have slate lintels, while the first floor has timber lintels. The gable stacks include drip courses and a neck drip course.

The shopfront to the left contains a bowed and paned shop window, with a door to its left that has a plain overlight inscribed with "Wm THOMAS." This shopfront is framed by three panelled pilasters with outset heads that support a weatherboard. Further left, there is a cartshed featuring two pitching doors set within a small raised gabled dormer. A lean-to has been added to the rear of the house, which is partly glazed.

Local climate

Ty-isaf sits in one of the wettest parts of the UK, with an average of 1,190 mm of rain a year. This makes it wetter than 91% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.

It experiences an average of 54 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 34 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
  • Related listed building consents — 2 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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