Carreg Wen, Marine Terrace is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 26 September 2005. House.

Carreg Wen, Marine Terrace

WRENN ID
ghost-jade-barley
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
26 September 2005
Type
House
Address
Carreg Wen, Marine Terrace, 2 Fford Garth (Garth Road), Porthmadog
OS grid reference
SH 568 382
Coordinates
52.92268, -4.13103
Source
Cadw listing

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

Description

Carreg Wen is a late Georgian style house that stands 2½ storeys tall and features three windows. It is constructed of rubble stone laid in regular courses, with large stone lintels and a slate roof that has coursed stone end stacks. The central entrance is highlighted by a fielded-panel door, which is topped by a 2-pane margin-glazed overlight. The house has hornless sash windows, with 12 panes in the lower storey and 16 panes in the upper storey. Additionally, there are two gabled dormers that have 2-light windows and slate-hung sides.

Local climate

Carreg Wen, Marine Terrace sits in one of the wettest parts of the UK, with an average of 1,490 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 97% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 60% of listed buildings. Of these, 15 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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  • 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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  2. Wenallt, Marine Terrace Grade II 19 m
  3. Afallon, Marine Terrace Grade II 28 m
  4. Garthowen, Marine Terrace Grade II 37 m
  5. Aberteg, Marine Terrace Grade II 46 m
  6. Harbour Side, including attached gate piers and wall Grade II 51 m
  7. Belle Vue, including forecourt wall and railings Grade II 56 m
  8. 2 Pencei (Cornhill) Grade II 57 m
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  10. Belle Vue, including forecourt wall and railings Grade II 63 m