20, St Martin's Square is a Grade II* listed building in the Chichester local planning authority area, England. First listed on 5 July 1950. House. 1 related planning application.
20, St Martin's Square
- WRENN ID
- watchful-cobble-root
- Grade
- II*
- Local Planning Authority
- Chichester
- Constituency
- Chichester MP: Jess Brown-Fuller (LD)
- Country
- England
- Date first listed
- 5 July 1950
- Type
- House
- Address
- 20, St Martin's Square, PO19 1NR
- OS grid reference
- SU 862 049
- Coordinates
- 50.83759, -0.7772
- Source
- Historic England listing
Description
No 20 St Martin's Square is an 18th-century building that stands two storeys high with an attic and features three windows. It is constructed of red brick, with the central portion slightly projecting and showcasing a Venetian window on the first floor, topped by a gable resembling a pediment. The other windows are sash windows with thick glazing bars, and there are two dormers present. A stringcourse runs above the ground floor, and a cornice with modillions is positioned above the first floor, extending into the gable and returning over brick pilasters. The doorway is adorned with Doric pilasters, a moulded frieze, and a pediment, while the door itself has six fielded panels, with the top two being cut away and glazed. This building is part of a group that includes Nos 1, 2, 3, 20, and 21, which collectively form a significant architectural ensemble with No 6 Lion Street.
Local climate
20, St Martin's Square receives an average of 910 mm of rain a year. This makes it wetter than 69% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 94% of listed buildings.
It experiences an average of 7 freeze-thaw cycles a year, fewer than 96% of listed buildings. Of these, 4 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.
- 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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