Llys Llewelyn is a Grade II* listed building in the Gwynedd local planning authority area, Wales. First listed on 10 August 1953. A Georgian House.

Llys Llewelyn

WRENN ID
first-rotunda-wren
Grade
II*
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
10 August 1953
Type
House
Period
Georgian
Address
Llys Llewelyn, 14 Palace Street, Walled Town, Caernarfon, LL55 1RR
OS grid reference
SH 478 627
Coordinates
53.1401, -4.27614
Source
Cadw listing

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

Description

Llys Llewelyn is a symmetrical Georgian house built in the 18th century, featuring three bays and three storeys. The exterior is finished with scribed stucco walls and a slate roof that has projecting eaves, along with a tall square brick chimney stack on the left side. The central doorway is flanked by shallow, full-height canted bay windows. The doorway itself has a panelled door with a plain overlight and a gabled hood above it. There is also an iron bracket above the door that once held a public house sign. The windows throughout the building are 12-pane hornless sashes, except for those on the upper storey, which are 9-pane sashes.

At the rear, the roughcast surface features stair windows in the centre and a 12-pane sash window below the eaves. There is a lean-to on the ground floor, and the first floor has both 12 and 9-pane sashes that are unaligned.

Inside, the house retains its original layout, with a central entrance hall, a drawing room to the right, and a kitchen to the left. The dog-leg staircase located at the rear of the entrance hall has turned balusters and plain square newels, and it may be a re-used element. The drawing room includes wood arched recesses flanking the fireplace, which has been altered. The kitchen still has a fireplace with a timber lintel. Additionally, the entrance hall features re-set panelling from the early 17th century.

Local climate

Llys Llewelyn 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 — 2 transactions since 2007
  • 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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