10 Y Graig (Sunnyside) is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 1 April 1974. Terraced houses.

10 Y Graig (Sunnyside)

WRENN ID
long-outpost-wind
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
1 April 1974
Type
Terraced houses
Address
10 Y Graig (Sunnyside), Tremadog, Porthmadog
OS grid reference
SH 559 402
Coordinates
52.94013, -4.14489
Source
Cadw listing

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

Description

10 Y Graig (Sunnyside) is part of a terrace of five two-storey houses located in Tremadog, constructed from local stone. The stonework is roughly coursed and squared for No 9, while the other houses feature random rubble with larger quoins. The terrace has stone lintels, a slate roof, and six stone chimney stacks. No 21 is a later addition to the row and is single-fronted, with its windows and door on the right, both replaced in the original openings. The left gable end of No 21 is painted black, and there is a lean-to at the back. A vertical joint separates Nos 20 and 21. Nos 20, 19, and 10 are also single-fronted with entrances on the right. No 20 is the best preserved, featuring a boarded door with an overlight and four-pane hornless sash windows. Nos 19 and 9 have had their doors and windows replaced in the late 20th century, but still in the original openings. No 9 is double-fronted and has also had its door and windows replaced in the original openings, along with a flat-roof rear wing. This terrace is part of a group that includes 9-10 and 19-21 Y Graig (Sunnyside).

Local climate

10 Y Graig (Sunnyside) 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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Nearby listed buildings

  1. 19 Y Graig (Sunnyside) Grade II 4 m
  2. 9 Y Graig (Sunnyside) Grade II 5 m
  3. 20 Y Graig (Sunnyside) Grade II 8 m
  4. 21 Y Graig (Sunnyside) Grade II 13 m
  5. 8 Y Graig (Sunnyside) Grade II 20 m
  6. 7 Y Graig (Sunnyside) Grade II 26 m
  7. 6 Y Graig (Sunnyside) Grade II 35 m
  8. 5 Y Graig (Sunnyside) Grade II 64 m
  9. 4 Y Graig (Sunnyside) Grade II 72 m
  10. Cynfal Grade II 81 m