Wonastow House is a Grade II listed building in the Monmouthshire local planning authority area, Wales. First listed on 27 September 2001. A Regency House. 1 related planning application.
Wonastow House
- WRENN ID
- brooding-chimney-peregrine
- Grade
- II
- Local Planning Authority
- Monmouthshire
- Constituency
- Monmouthshire MP: Catherine Fookes (Lab)
- Country
- Wales
- Date first listed
- 27 September 2001
- Type
- House
- Address
- Wonastow House, Monmouth, Mitchel Troy
- OS grid reference
- SO 483 111
- Coordinates
- 51.79615, -2.75059
- Source
- Cadw listing
Description
Wonastow House is a simple Regency-style building, featuring painted stucco and a shallow hipped slate roof with oversailing eaves. The house has a rectangular double-depth plan facing west, along with a southeast service wing that is the former house. The two-storey facade has three windows and includes a centrally located rectangular flat-roofed porch. This porch has a large segmental-headed opening at the front, which is now filled with a multi-paned sash window, likely a former doorway. The ground floor has two 12-pane sash windows, while the upper floor features three 9-pane sashes. A chimney stack is offset to the right, located behind the front ridge of the roof.
On the right-hand return wall, there is a curved, flat-roofed bay window. In the angle with the rear wing, a lean-to conservatory is attached to the front wall of the wing, covering a doorway and a window, and above this is a tripartite sash window. The south gable of the wing has an extruded former bread-oven, which is not visible from the inside, and a gable chimney.
Inside, there is a straight staircase with stick balusters and fluted architraves around the doorways. The dining room, located at the rear of the right-hand side, has long and low proportions and features two coved niches at the front end.
Local climate
Wonastow House receives an average of 850 mm of rain a year. This makes it wetter than 60% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 61% of listed buildings.
It experiences an average of 41 freeze-thaw cycles a year, more than 80% of listed buildings. Of these, 19 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
- Related listed building consents — 1 application
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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