Coed Mawr is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 29 October 2003. House.

Coed Mawr

WRENN ID
ghost-cornice-saffron
Grade
II
Local Planning Authority
Snowdonia National Park
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
29 October 2003
Type
House
Address
Coed Mawr, Afon Artro Valley, Llanbedr, Gwynedd
OS grid reference
SH 601 282
Coordinates
52.8334, -4.07741
Source
Cadw listing

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

Description

Coed Mawr is a two-storey, two-unit house, dating from an unknown period, which has been extended. A single-bay service wing was added to the left (southwest) end, and it is linked to a bakehouse and outbuilding to the right by a single-storey block. The house is built of rubble masonry, with a slate roof featuring stone copings and tall stone stacks delineating the original house’s extent, complete with dripstones and capping. Gable dormers break the eaves along the front elevation, and small casements are set under the eaves to the rear.

The main elevation faces southeast. The original house has a doorway slightly offset to the right, flanked by casement windows, with similar windows in gable dormers above. The windows are replacements set in original openings. The service wing on the left, likely originally a lofted cowhouse or stable, has a central doorway with a ventilation slit to the right and a similar dormer offset to its left. At right angles to the right (northeast) end of the range is a single-storey bakehouse of similar materials, retaining a roof of small, old slates and a squat gable stack at its southeast gable. External access is through a doorway in the southwest wall, and there are two casement windows in the opposite wall. A single-storey block, extensively modernised, connects to the right (northeast) end of the original house, and it has a squat stack at the northeast gable and wide, modern French windows to the rear. This block abuts a single-storey, lofted outbuilding, probably a cowhouse, at the far right (northeast) end, which is constructed of boulder masonry with a slate roof featuring stone copings and has a doorway in the southeast wall and a casement window in the northeast gable’s pitching hole.

The interior reveals the original plan form, retaining the opposing doorway opening to the main entrance, although the cross passage panelling has been removed. Exposed timbers in the left (southwest) end of the main room display massive chamfered cross beams and chamfered joists. The right end of this room is now enclosed by a modern ceiling. The fireplace at the southwest end retains a massive chamfered bressumer. Fireplace stairs to the southwest provide access to first-floor rooms, including internal access to the loft at the southwest end of the range. A linear corridor runs along the front elevation, and the bedroom at the northeast end retains a small stone fireplace.

The northeast end of the main downstairs room has been modernised, with the ceiling and fireplace encased. Internal access leads to a room at the northeast end that retains a stone fireplace, and from there to the bakehouse, which retains a massive inglenook.

Local climate

Coed Mawr sits in one of the wettest parts of the UK, with an average of 1,460 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 96% of listed buildings.

It experiences an average of 31 freeze-thaw cycles a year, fewer than 62% of listed buildings. Of these, 14 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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