Plas-isa is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 30 March 1999. House.
Plas-isa
- WRENN ID
- grey-doorway-swallow
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 30 March 1999
- Type
- House
- Address
- Plas-isa, Penmorfa, Dolbenmaen, LL49 9RS
- OS grid reference
- SH 548 406
- Coordinates
- 52.94335, -4.16092
- Source
- Cadw listing
Description
Plas-isa is a two-storey building constructed from coursed squared rubble stonework and topped with a hipped slate roof. The main elevation, which faces east, features three bays that include a central panelled door and flanking margin-glazed windows. These are all covered by an open timber lean-to verandah that has a slated roof and modillion eaves. On the first floor, there are 9-paned single sash windows, with the central window being blind. A stone stack is located on the party wall with No 2, and there is another stack with weather courses at the northern end of the hipped roof. At the rear, there is a contemporary lean-to that contains 16-paned sash windows, likely used for service rooms. Further back, there is a single-storey washhouse set at right angles, which has a side door and a 6-paned sash window.
Local climate
Plas-isa sits in one of the wettest parts of the UK, with an average of 1,550 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It experiences an average of 20 freeze-thaw cycles a year, fewer than 79% of listed buildings. Of these, 8 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
Sign in or create a free account to unlock:
- No EPC on record for this property
- Sale history — 3 transactions since 2003
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
this building 1 similar nearby listed buildings