15 Pencei (Cornhill) is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 30 March 1951. House. 1 related planning application.
15 Pencei (Cornhill)
- WRENN ID
- blind-crypt-wind
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 30 March 1951
- Type
- House
- Address
- 15 Pencei (Cornhill), Porthmadog, LL49 9AT
- OS grid reference
- SH 568 383
- Coordinates
- 52.92387, -4.13098
- Source
- Cadw listing
Description
14-15 Cornhill is a pair of 2½-storey double-fronted houses built from large squared slate-stone blocks arranged in regular courses. They feature a slate roof with two skylights on each house and stone end stacks. Number 14 has raised rendered surrounds painted white, a fielded-panel door beneath a narrow overlight, and 4-pane hornless sash windows. Number 15 also has raised rendered surrounds, but features a replacement half-glazed door under a narrow overlight and 4-pane horned sash windows. Each house has slate steps leading to the entrances. Number 14 includes a dwarf forecourt wall made of coursed, roughly shaped blocks, while Number 15 has replacement steps.
Both houses have replacement windows at the rear, and Number 14 has an added large dormer. The interior has been modernised. This pair of houses belongs to a group context with 14-15 Pencei (Cornhill).
Local climate
15 Pencei (Cornhill) 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
- Related listed building consents — 1 application
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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Nearby listed buildings
- 14 Pencei (Cornhill)
- Cornhill Cottage, including revetment walls and steps
- 13 Pencei (Cornhill)
- Limekiln Cottage, including revetment walls and steps
- 12 Pencei (Cornhill)
- Tafarn Pencei Cafe Bar
- 11 Pencei (Cornhill)
- 19 Pencei (Cornhill)
- Caffi y Morwr Madog (The Mariner Café) and house
- 20 Pencei (Cornhill)