Cwrt yr Harbwr is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 1 April 1974. Block of dwellings and warehouse.

Cwrt yr Harbwr

WRENN ID
plain-mantel-grain
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
1 April 1974
Type
Block of dwellings and warehouse
Address
Cwrt yr Harbwr, Porthmadog
OS grid reference
SH 569 384
Coordinates
52.92444, -4.12963
Source
Cadw listing

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

Description

Cwrt yr Harbwr is a two-storey building made of rubble stone, featuring large slate-stone blocks arranged in rough courses, topped with a hipped slate roof. It has a stone ridge stack located to the right of the center and at the right end. The front of the building faces northeast, where the two original dwellings are situated on the right side and still have their original openings. The central and left sections of the building, which served as a warehouse, mainly feature inserted openings. All the inserted or replaced windows are small-pane horned sashes.

The gabled center has glazed doors in earlier openings on both storeys, flanked by windows for apartments Nos 3 and 4. At the left end, there is a balcony supported by steel posts and a glazed door beneath a gable. To the right of this is a lean-to porch with glazed doors leading to apartments Nos 5 and 6, along with two additional windows further to the right, and two upper-storey windows, one of which is a flat half-dormer. A full-height vertical joint to the right of center indicates that the warehouse and the dwellings were built at different times.

The double-fronted house (No 2) and the single-fronted house (No 1) have replacement doors, with the door to No 1 set in a slightly wider original opening. Notably, No 1 does not have an upper-storey window. The right (north) end wall of No 1 is constructed from slate-stone blocks laid in regular courses and features a central blocked doorway, which is unusually positioned directly beneath the stack. The nine-window rear elevation has replacement windows for the original dwellings on the left end, while the rest consists of inserted windows. A full-height joint separates the warehouse from the domestic section, and four additional full-height vertical joints suggest that there were originally open bays on this side of the warehouse. The building has not been inspected.

Local climate

Cwrt yr Harbwr 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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  • 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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