27 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. House. 3 related planning applications.

27 Segontium Terrace, including forecourt railings

WRENN ID
muffled-lead-hazel
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
27 Segontium Terrace, including forecourt railings, Caernarfon, LL55 2PH
OS grid reference
SH 480 625
Coordinates
53.13799, -4.27257
Source
Cadw listing

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

Description

27 Segontium Terrace is a pair of late Georgian houses, built slightly higher than the adjacent terrace of 20-26 Segontium Terrace. The houses are three storeys tall and have two bays, featuring graded slate roofs with corbelled eaves and roughcast stacks on the right side. The original 19th-century cast iron railings, which have decorative finials, are set on a dwarf stone wall, although the gates have been replaced.

The front of the houses is finished in scribed stucco and includes four-pane horned sash windows. The doorway on the left is accessed through an added half-glazed porch, which features a round-headed radial-glazed fanlight above a fielded-panel door.

Local climate

27 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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  • No EPC on record for this property
  • Sale history — 1 transaction since 2003
  • Related listed building consents — 3 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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