Twb Lemon (Lemon Tub) and house/office is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 26 September 2005. Shop and house.

Twb Lemon (Lemon Tub) and house/office

WRENN ID
stranded-belfry-vermeil
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
26 September 2005
Type
Shop and house
Address
Twb Lemon (Lemon Tub) and house/office, 117 Stryd Fawr (High Street), Porthmadog
OS grid reference
SH 567 388
Coordinates
52.9277, -4.13261
Source
Cadw listing

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

Description

Twb Lemon, also known as the Lemon Tub, is a shop and house (or office) that stands two storeys tall with an attic. The building features a front made of whitened scribed roughcast, a renewed slate roof, and stone stacks at each end. The late 19th-century shop front is highlighted by panelled pilasters with stylised foliage capitals. Above the pilasters, encaustic figure tiles are located at the ends of the fascia, which has a later fascia added on top. The cornice displays a frieze decorated with 4-leaf and ballflower motifs. The shop windows have small panes and are set above a later marbled stallboard, framing a recessed entrance that includes a glazed door with a lower faceted panel.

On the upper storey, there are two canted oriel windows, each featuring 2-pane sashes and cornices that match the shop front. The attic contains round-headed 2-light casement windows situated under gables adorned with fretwork scrolls.

The right gable end is constructed from slate rubble laid in rough courses and features double-panelled doors with an overlight on the right side, which is the original entrance to the house. The upper storey includes a 12-pane sash window on the right and a 2-pane sash window on the left. In the attic, there is a 12-pane horned sash window located to the left of centre.

At the rear, there is a lower two-storey wing with six windows, made of slate-stone rubble laid in rough courses, facing Chandlers Place. The lower storey has 12-pane horned sash windows with raised cement surrounds. The left end features a panel door, followed by two windows, a replacement door, another window, a replacement door, and a window that was formerly a doorway at the right end. The upper storey has five small-pane horned sash windows and a similar paired window at the right end. The gable end includes a former upper-storey loading door that has been converted into a window, situated under a projecting gable that once held a pulley block. On the right side, there is an outshut with double doors beneath a stone lintel.

The rear of the main range has skylights and a 2-light window on the right side in the middle storey. The building has not been inspected.

Local climate

Twb Lemon (Lemon Tub) and house/office sits in one of the wettest parts of the UK, with an average of 1,490 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 97% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 60% of listed buildings. Of these, 15 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 — 1 transaction since 2017
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  • 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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