Bryn Helen is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 31 March 1983. House.
Bryn Helen
- WRENN ID
- hidden-merlon-torch
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 31 March 1983
- Type
- House
- Address
- Bryn Helen, South Road, Caernarfon
- OS grid reference
- SH 482 621
- Coordinates
- 53.13517, -4.27013
- Source
- Cadw listing
Description
Bryn Helen is an L-shaped house built in the early 19th century. It features a two-storey, three-bay main house that faces north, with a rear service wing on the west side, which is now a separate dwelling known as Llwyn Helen. The main house is designed in a symmetrical Regency style, constructed of scribed render with a hipped slate roof that has wide panelled and bracketed eaves. There are chimney stacks on the left and right sides, as well as on the rear wing. A lean-to veranda supported by cast iron posts has a replaced roof. The central bay of the main house includes double half-lit panelled doors with margin glazing and a fluted surround. On either side, there are small-pane sash windows that extend to ground level, set in canted bays. The upper storey features 12-pane hornless sash windows.
On the right side wall, there is a 12-pane segmental-headed sash window at the upper right, an inserted window at the upper left, and an added conservatory on the lower storey. The rear wing, which is slightly set back from the main range, has a 12-pane hornless sash window in the upper storey, a 4-pane casement window to the right, and inserted French doors on the lower storey. The left side wall has inserted windows on both storeys. The rear of the house has 12-pane horned sash windows on the right and a narrow 8-pane sash window for the stair in the angle with the rear wing. The rear wing also features a 12-pane sash window at the upper right, a small casement window at the upper left, and a lean-to below.
Inside, the entrance vestibule has a classical plaster cornice and a doorway with a neo-classical iron overlight that features an elliptical glazing pattern, leading into the stair hall. The open-well stair has turned balusters and newels. The room to the left contains a late 19th-century fireplace with fluted Ionic pilasters and an elliptical-arched niche on the rear wall. The rooms on the left and right have classical plaster ceiling cornices, and panelled doors with thin vertical ribs are preserved in the lower storey.
Local climate
Bryn Helen 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
- No sale records on file
- 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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