23, High Street is a Grade II listed building in the Portsmouth local planning authority area, England. First listed on 10 January 1953. House, offices. 1 related planning application.

23, High Street

WRENN ID
south-column-equinox
Grade
II
Local Planning Authority
Portsmouth
Constituency
Portsmouth South MP: Stephen Morgan (Lab)
Country
England
Date first listed
10 January 1953
Type
House, offices
Address
23, High Street, City of Portsmouth, PO1 2LS
OS grid reference
SZ 633 994
Coordinates
50.79093, -1.10193
Source
Historic England listing

Also on this page: sale history · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

No. 23 High Street is a house that has been converted into offices and dates from the late 18th century. It features grey brick headers with red brick dressings and has a concealed roof. There are brick stacks on the left and a rendered stack on the right. The building has three storeys and four bays.

On the right side, there is a 9-panelled door, with the top three panels glazed, surrounded by panelled reveals and soffit, an architrave, and a flat hood supported by shaped brackets. To the left, there are three sashes, and on the first floor, there are four 12-pane sashes, all set under cambered gauged brick arches with keystones. The second floor has four 12-pane sashes with their heads directly below the eaves board.

At the rear, the building is similar but has two blind bays on the left and features a flat roof at the first floor level with five escape stairs. The left return is constructed in Flemish bond and has one 12-pane window on the first floor, with a blind window below it. There is a battered stone plinth at ground level and two iron ties at the first floor level. The interior has not been inspected.

Local climate

23, High Street receives an average of 810 mm of rain a year. This makes it drier than 52% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 77% of listed buildings.

It experiences an average of 19 freeze-thaw cycles a year, fewer than 79% of listed buildings. Of these, 8 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
  • Sale history — 1 transaction since 1998
  • 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
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