Avellanau House is a Grade II listed building in the Pembrokeshire local planning authority area, Wales. First listed on 29 October 1987. House.
Avellanau House
- WRENN ID
- endless-mortar-sedge
- Grade
- II
- Local Planning Authority
- Pembrokeshire
- Constituency
- Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
- Country
- Wales
- Date first listed
- 29 October 1987
- Type
- House
- Address
- Avellanau House, Merlin's Bridge, Haverfordwest
- OS grid reference
- SM 945 140
- Coordinates
- 51.78727, -4.98029
- Source
- Cadw listing
Description
Avellanau House is a country house featuring unpainted stucco with hipped slate roofs and deep flat eaves. It has stuccoed chimneys and two main facades. The northern facade consists of two, one, and two bays, with a projecting pedimented center that has similar eaves, a raised plinth, a band, and a stepped eaves band. The windows are hornless 12-pane sashes with slate sills, all boarded over since 2003. The second window on the ground floor has been lengthened to serve as a door. The center of the ground floor has a plain canted bay with a flat roof and three smaller boarded windows.
The entrance front has four bays and features the same horizontal mouldings and 12-pane sashes. The door, located in the second bay, is slightly to the right of the window above, and the center two bays are within a three-bay classical portico. This portico has Roman Doric columns, with the center bay wider and the outer columns paired with square piers that have pilaster responds. It includes a triglyph frieze and a deep cornice, with four rendered steps leading up to a broad doorway that is boarded over since 2003, concealing the doors and side-lights. The house has a hipped roof with deep eaves.
The southern side is simpler, featuring a hipped projection to the left that resembles the other fronts, with one 12-pane sash on each floor. To the right, there is a three-bay range with only a plinth, which has an arched stair light to the left above a plain flat-roofed porch that leads down to the basement. The other two bays have sashes across three storeys, with the upper ones breaking the eaves under catslide roofs. The rear of the house has twin hipped roofs with a valley in between, and attached walls enclose a small rear service court. The two main chimneys are located on the ridges of the two rear roofs, just behind the entrance front range.
The interior was inaccessible at the time of the survey.
Local climate
Avellanau House sits in a wetter-than-average part of the UK, with an average of 1,060 mm of rain a year. This makes it wetter than 85% 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 4 freeze-thaw cycles a year, fewer than 98% of listed buildings. Of these, 1 follows 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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