Henllys is a Grade II listed building in the Denbighshire local planning authority area, Wales. First listed on 22 December 1989. A Regency Residential.
Henllys
- WRENN ID
- riven-plaster-scarlet
- Grade
- II
- Local Planning Authority
- Denbighshire
- Constituency
- Clwyd East MP: Becky Gittins (Lab)
- Country
- Wales
- Date first listed
- 22 December 1989
- Type
- Residential
- Period
- Regency
- Address
- Henllys, The Duke, Llangollen
- OS grid reference
- SJ 205 433
- Coordinates
- 52.98113, -3.18528
- Source
- Cadw listing
Description
Henllys is a two-storey house dating from the 18th century, with rendered elevations and a hipped slate roof, wide boarded eaves and rendered chimney stacks. The main façade is the one overlooking the garden and the A5, and it is a three-window design with a full-height splayed bay in the centre. It features mostly 16-pane sash windows, along with an earlier 20th-century bay extension to the centre and a modern small-pane window to the right. The south-facing end of the left side has a 16-pane sash window above a Victorian square bay with a lean-to roof and a tall window on the main face. The west side, facing the lane, has a full-height advanced bay in the centre above the main entrance, with a modern door. An outhouse projects forward to the left of the entrance and features a camber-headed sash window. The roof lowers slightly to the left, with a modern kitchen extension behind the outhouse, which extends up to the boundary wall and has a round-arched doorway.
Internally, the drawing room and dining room show earlier origins, though the overall character is Regency. The drawing room ceiling is particularly refined, with diagonal ribs springing from a central square panel containing a broad gilded rose, along with paterae, egg and dart, anthemion, and other ornament on the ribs. A fine candelabra, made by a local carpenter, was installed when the house was amongst the first in the area to be electrified. The shallow frieze appears to be older than the ceiling, exhibiting a less precise repeated swirling pattern. The picture rail is from the 19th century, but precedes the bay window’s construction. A Gothic marble chimneypiece with an ogee iron grate, originally from Ystrad (the Vivod dowager house), is reused in reverse. The small dining room has a similar but simpler ceiling without ribs; featuring a large scalloped rose with a circular beaded surround. Both rooms have six-panel doors and deep-panelled reveals. The hall, which originally had a scribed marble effect, features an elaborate egg and dart cornice and Regency reeded architraves to the main rooms. A steep staircase rises against the west wall, with S-shaped tread ends and turned newel posts. Coved cornices are present upstairs, and the earlier part of the building has deep-panelled reveals and high skirtings. A Shropshire and North Wales copper fire certificate is also recorded.
Local climate
Henllys receives an average of 920 mm of rain a year. This makes it wetter than 70% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 73% of listed buildings.
It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 28 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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