Gellilydan Terrace is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 25 February 2005. Terrace.
Gellilydan Terrace
- WRENN ID
- stony-threshold-hawk
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 25 February 2005
- Type
- Terrace
- Address
- Gellilydan Terrace, Maentwrog, Gwynedd
- OS grid reference
- SH 683 398
- Coordinates
- 52.94023, -3.96024
- Source
- Cadw listing
Description
Gellilydan Terrace is a two-storey terrace of houses built from roughly coursed mortared rubble masonry, featuring large stones as quoins and lintels. The terrace has a slate roof with stone coping at the northeast gable and rectangular stone stacks that include dripstones and capping.
The third house in the row from the right (northeast end) has a doorway that is offset to the right. To the left of the doorway, there is a single horned sash window on both the ground and first floors; the ground floor window has 12 panes, while the first-floor window is an unequal sash with 9 panes set under the eaves. The interior was not inspected during the survey conducted in June and July 2003.
Local climate
Gellilydan Terrace sits in one of the wettest parts of the UK, with an average of 1,450 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.
It experiences an average of 36 freeze-thaw cycles a year, more than 60% of listed buildings. Of these, 18 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 — 12 transactions since 1995
- 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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