13 Segontium Terrace, including forecourt railings is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 31 March 1983. Terrace. 2 related planning applications.

13 Segontium Terrace, including forecourt railings

WRENN ID
spare-latch-equinox
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
31 March 1983
Type
Terrace
Address
13 Segontium Terrace, including forecourt railings, Caernarfon
OS grid reference
SH 480 625
Coordinates
53.13856, -4.27348
Source
Cadw listing

Also on this page: sale history · EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

This is a late Georgian terrace of nine 3-storey, 2-bay houses, part of a group numbered 11-19 Segontium Terrace. The houses have slate roofs and brick or roughcast stacks to the R. Entrances are located in the left-hand bay, accessed by steps. Original iron railings, set on dwarf walls, run along the front, featuring pointed and cone finials to the stanchions. The gates have been replaced. Houses 15-19 have a larger plan and project forward in the rear elevation. They retain original architraves in the front elevation, whereas numbers 11-14 have later 19th-century detail in the front.

The front of the building has been rendered, with eared and lugged architraves, and sill bands in smooth render. The doorway is within a keyed architrave and contains a panelled door with a replaced fanlight. The windows are 4-pane sashes, with the upper left window being blind.

Local climate

13 Segontium Terrace, including forecourt railings 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 4 transactions since 2001
  • Related listed building consents — 2 applications
  • 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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  1. 14 Segontium Terrace, including forecourt railings Grade II 4 m
  2. 12 Segontium Terrace, including forecourt railings Grade II 5 m
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  4. 11 Segontium Terrace, including forecourt railings Grade II 10 m
  5. 16 Segontium Terrace, including forecourt railings Grade II 13 m
  6. The Albert Inn Grade II 16 m
  7. 17 Segontium Terrace, including forecourt railings Grade II 17 m
  8. 18 Segontium Terrace, including forecourt railings Grade II 21 m
  9. 19 Segontium Terrace, including forecourt railings Grade II 25 m
  10. 50 New Street, including forecourt railings Grade II 30 m