23 Segontium Terrace is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 31 March 1983. A Late Georgian House. 1 related planning application.
23 Segontium Terrace
- WRENN ID
- broken-gravel-honey
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 31 March 1983
- Type
- House
- Address
- 23 Segontium Terrace, Caernarfon
- OS grid reference
- SH 480 625
- Coordinates
- 53.13814, -4.27279
- Source
- Cadw listing
Description
23 Segontium Terrace is part of a late Georgian terrace consisting of seven three-storey, two-bay houses with basements. The houses feature rendered fronts, with some retaining original moulded architraves around the windows and exposed rubble stone walls at the rear. The slate roofs are sloped towards the back, and each house has a brick or roughcast chimney stack on the right side. The doorways are located on the left sides and are accessed by steps. Many houses still have their original iron railings on dwarf stone walls, although the gates to the basement steps have been replaced. The railings are adorned with trident finials and urn finials on the stanchions.
In addition, 23 Segontium Terrace has a roughcast front with replaced windows in the original openings and a doorway that features an added flat-roofed porch. The forecourt railings have been removed.
Local climate
23 Segontium Terrace sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 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
- 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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