23 Mostyn Street is a Grade II listed building in the Conwy local planning authority area, Wales. First listed on 16 March 1976. House.
23 Mostyn Street
- WRENN ID
- still-sandstone-fog
- Grade
- II
- Local Planning Authority
- Conwy
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 16 March 1976
- Type
- House
- Address
- 23 Mostyn Street, Llandudno, LL30 2NL
- OS grid reference
- SH 784 822
- Coordinates
- 53.32279, -3.82564
- Source
- Cadw listing
Description
Nos 21 and 23 Mostyn Street in Llandudno is a three-storey building with an attic and five bays, featuring a centre bay with narrower windows. The exterior is clad in stucco and is topped with a balustraded parapet adorned with urn finials and a cornice. There is a verandah dating from the late 19th to early 20th century, which consists of six bays and has a modern corrugated roof. The verandah is supported by plain circular columns with panelled bases that have bead moulding, and the capitals feature ornate iron spandrils with a flower motif, along with a band that has a Greek key course at its base extending between each pair of spandrils.
The building has a gabled roof with three dormers and a three-window front, with the right bay being narrower. On the top floor, there are three casement windows. The first floor features two canted bay windows with curvilinear parapets and a single light window to the right.
Local climate
23 Mostyn Street sits in a wetter-than-average part of the UK, with an average of 1,100 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 76% of listed buildings.
It experiences an average of 34 freeze-thaw cycles a year, fewer than 51% of listed buildings. Of these, 18 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
- No related consent applications matched
- 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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