Llwynon is a Grade II listed building in the Pembrokeshire local planning authority area, Wales. First listed on 25 September 1951. House. 1 related planning application.

Llwynon

WRENN ID
pitched-buttress-snow
Grade
II
Local Planning Authority
Pembrokeshire
Constituency
Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
Country
Wales
Date first listed
25 September 1951
Type
House
Address
Llwynon, 61 St James Street, Narberth, SA67 7DB
OS grid reference
SN 110 146
Coordinates
51.79836, -4.74162
Source
Cadw listing

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

Description

Llwynon is an early 19th-century, Georgian house of three storeys and a basement, originally featuring three windows. The exterior is colourwashed cement render over rubble stone. The roof is gently pitched and covered in slate, with plain eaves and flush bargeboards. Stone stacks have simply moulded caps. The upper floor windows have nine panes to each sash, with plain reveals. The first floor windows are twelve-pane sashes, and larger, similar windows flank the central doorcase, which has panelled reveals and a soffit. A good segmental fanlight sits above the six-panelled front door. Basement entrances are located below the main floor, with windows on either side; one window has sixteen panes and is accessible by steps, while another is in a lightwell.

The rear of the house features boxed eaves and Victorian sash windows. A tripartite bay window with 19th-century sashes stands on the ground floor to the left, and a brick projection is centrally located. Original wrought iron railings with spear points are set within a stone base to the forecourt.

To the right of the main house is a three-storey annexe with a single window front. It is also rendered in cement over rubble and has a gently pitched slate roof and a stone stack. The second-floor window is a two-light casement, while the first and ground floors have Victorian sash windows with plain reveals. A six-panelled door is offset to the left. This annexe is surrounded by iron railings on a stone base, leading to a paved forecourt.

The interior features broad six-panel doors and plain cornices. A broad arch supported by fluted pilasters leads to the stair hall, which has a panelled soffit. The sweeping turned staircase is located within an apsidal well. The building was undergoing renovation in January 1988.

Local climate

Llwynon sits in one of the wettest parts of the UK, with an average of 1,170 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 13 freeze-thaw cycles a year, fewer than 88% of listed buildings. Of these, 5 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 — 2 transactions since 2017
  • 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
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