20 New Castle Street is a Grade II listed building in the Merthyr Tydfil local planning authority area, Wales. First listed on 22 August 1975. Residential. 1 related planning application.
20 New Castle Street
- WRENN ID
- eternal-spandrel-tide
- Grade
- II
- Local Planning Authority
- Merthyr Tydfil
- Constituency
- Merthyr Tydfil and Aberdare MP: Gerald Jones (Lab)
- Country
- Wales
- Date first listed
- 22 August 1975
- Type
- Residential
- Address
- 20 New Castle Street, Town, CF47 0BH
- OS grid reference
- SO 050 063
- Coordinates
- 51.74772, -3.37708
- Source
- Cadw listing
Description
This is a two-storey house, likely dating from the 18th century, with a stuccoed front facade. It originally had two windows visible from the front. The roof is slate. The first floor has two casement windows. The ground floor features a modern window to the right and a round-headed doorway offset to the left. The doorway has plain stucco pilasters and a moulded architrave, with a semi-circular fanlight above. A modern six-panel door is set within the doorway.
Local climate
20 New Castle Street sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 87% of listed buildings.
It experiences an average of 44 freeze-thaw cycles a year, more than 85% of listed buildings. Of these, 22 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 — 1 transaction since 2019
- 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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