20, PORTLAND SQUARE (See details for further address information) is a Grade II listed building in the Cumberland local planning authority area, England. First listed on 16 December 1987. House, office.
20, PORTLAND SQUARE (See details for further address information)
- WRENN ID
- strange-eave-tide
- Grade
- II
- Local Planning Authority
- Cumberland
- Constituency
- Carlisle MP: Ms Julie Minns (Lab)
- Country
- England
- Date first listed
- 16 December 1987
- Type
- House, office
- Address
- 20, PORTLAND SQUARE (See details for further address information), 5, Brunswick Street
- OS grid reference
- NY 405 556
- Coordinates
- 54.89206, -2.92836
- Source
- Historic England listing
Description
No. 20 Portland Square, which includes No. 5 Brunswick Street, is a pair of houses that have been converted into an office. They were built in the late 1870s or 1880s. The facade facing Portland Square is made of calciferous sandstone, with a quarry-faced finish at the basement level and a bracketed cornice. The roof is covered with graduated slate and is hipped at the corner, featuring a white brick ridge chimney stack. The Brunswick Street facade is constructed of English garden wall bond brickwork, with a cornice made of modillioned brick and white brick. It also has a graduated slate roof, with ridge and end brick chimney stacks, the end one being reduced in size.
The building is two storeys high, with three bays on the Portland Square side and a single-bay return. The Brunswick Street facade has a lower roof line and consists of six bays. The Portland Square house is the end of a terrace, featuring a high central doorway that has been fitted with a sash window set in a stone architrave. There are flanking canted bay windows that extend from the basement, with paired sash windows above them and a single sash window above the former doorway, all within stone surrounds. The return side has paired sash windows in plain brick reveals. The Brunswick Street facade has an off-centre panelled door with an overlight, set within a pilastered stone porch. The sash windows here are in brick reveals, with slightly-arched brick heads and stone sills. The interior has not been inspected.
Local climate
20, PORTLAND SQUARE (See details for further address information) sits in a wetter-than-average part of the UK, with an average of 1,100 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 80% of listed buildings.
It experiences an average of 51 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 27 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.
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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
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- 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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