Dolfriog is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 9 December 1999. A C19 Gentry house. 4 related planning applications.

Dolfriog

WRENN ID
grim-slate-willow
Grade
II
Local Planning Authority
Snowdonia National Park
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
9 December 1999
Type
Gentry house
Address
Dolfriog, Nantmor, Porthmadog, Beddgelert, Gwynedd, LL48 6SN
OS grid reference
SH 614 458
Coordinates
52.99173, -4.06596
Source
Cadw listing

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

Description

Dolfriog is a Tudor-Gothic style gentry house comprising a main range with a short staircase wing alongside a larger L-plan wing to the rear. The building is two storeys with attics and a service basement, allowing the ground floor to be devoted to living rooms with varied views across the valley.

The house is constructed of coursed and dressed slate-stone with scalloped slate roofs. Axial chimney stacks flank the central bay of the main elevation and appear on the gable end of the rear wing, though the latter stack is truncated. The eaves are pronounced in their overhang. The main range features a plinth and stressed angle pilasters that continue upward to give pedimented emphasis to the gables. The house was rendered until relatively recently; this render may have been associated with presumed later 19th-century alterations. Its removal has revealed blocked windows in the main elevation and exposed rough brick construction behind the stone dressings. The rear wing incorporates markedly different masonry style with larger blocks of stone. Jackson's building reportedly had Bath stone window frames, which may have been cut back during later 19th-century changes.

The entrance front presents a long, relatively low 3-bay range with an advanced central gable over the entrance. This features a wide 4-centred arched doorway in a cavetto-moulded architrave with intersecting traceried overlight and flanking side lights with lattice glazing. An oriel window sits above the doorway with three segmentally arched mullioned lights and a chevron-moulded apron. A 2-light mullioned window occupies the gable apex above. The flanking bays display blocked windows to the ground floor with possible scars of hood-moulds, and 2-light round-arched mullions with hood-moulds on the first floor. A string course below the first floor continues across the return elevation to the west, which has tiered windows of three, two, and one lights, with traces of hood-moulds to ground and first floor windows.

The parallel gable of the L-plan rear range has windows in its south-facing elevation: paired mullioned and transomed lights with marginal glazing on each floor. An advanced gable beyond this has a 5-light ground floor window with a high-set transom and an oriel window above, similar to that of the entrance front, with a small light in the gable apex. The east-facing elevation has an oriel bay with round-headed mullioned lights to the ground floor, set over French doors and windows of the basement, in the return gable of the entrance range. Above are a 2-light window with hood-mould and a similar window to the attic storey. This attic window has a blind round-arched head suggesting an earlier window of different type, a detail also found at Cae Dafydd. A stepped stair window sits beneath the eaves in the short rear wing.

The plan comprises principal rooms to either side of a wide central hall, with the staircase offset to the rear—a layout similar to that at Cae Dafydd—and additional principal rooms in the L-plan rear wing. The hall is dominated by a large, richly decorated timber chimney piece incorporating carved narrative panels, assembled possibly from church furnishings of continental origin, which form an overmantel. Built-in seats flank the fireplace. Dado panelling with gothic arched detail echoes in the carpentry of the doorways. A fine cantilevered staircase features trefoiled decoration to the balusters and quatrefoil enrichment to the newels. Joinery of high order survives throughout the house, and there is one exposed fireplace in gothic style.

Local climate

Dolfriog sits in one of the wettest parts of the UK, with an average of 1,500 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 98% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 58% of listed buildings. Of these, 16 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 1998
  • Related listed building consents — 4 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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