Former slate warehouse on Oakleys Wharf is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 1 April 1974. Warehouse.

Former slate warehouse on Oakleys Wharf

WRENN ID
twisted-spindle-rowan
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
1 April 1974
Type
Warehouse
Address
Former slate warehouse on Oakleys Wharf, Porthmadog
OS grid reference
SH 569 384
Coordinates
52.92429, -4.12898
Source
Cadw listing

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

Description

The former slate warehouse on Oakleys Wharf is a single-storey building constructed of rubble stone with a slate roof. The northeast side, which used to be open-fronted with full-height coursed stone piers, has been infilled across all ten bays. The first bay, now serving as a harbour-master's office, is narrower and features an inserted boarded door and a steel-framed window, with pebble-dash below the sill. The second bay has a similar window, while the third bay contains boarded double doors. Bays four to nine have boarded infill, with doors incorporated in bay six. The tenth bay is mostly glazed, with rubble stone below the sill and a boarded door to the right. To the right of this bay is a full-height joint that marks the original end of the building, to which an extension has been added, roofed under the same range and featuring double boarded doors in each of its two bays.

On the left gable end, facing the harbour, there is a former doorway that has been blocked, with a window inserted into it. To the left of this is an inserted boarded door. The rear of the building has a centrally located inserted boarded door. The building has not been inspected.

Local climate

Former slate warehouse on Oakleys Wharf 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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  • No EPC on record for this property
  • No sale records on file
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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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  5. Wharf House Grade II 83 m
  6. 21 Pencei (Cornhill) Grade II 108 m
  7. Britannia Bridge Grade II 111 m
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  9. Cadw Mei Ce and house Grade II 112 m
  10. Awelfor Grade II 114 m