20 and 20a, Old Town is a Grade II listed building in the Lambeth local planning authority area, England. First listed on 27 March 1979. House.
20 and 20a, Old Town
- WRENN ID
- sleeping-niche-foxglove
- Grade
- II
- Local Planning Authority
- Lambeth
- Constituency
- Clapham and Brixton Hill MP: Bell Ribeiro-Addy (Lab)
- Country
- England
- Date first listed
- 27 March 1979
- Type
- House
- OS grid reference
- TQ 291 755
- Coordinates
- 51.46444, -0.14164
- Source
- Historic England listing
Description
Nos 20 and 20A on Old Town in Clapham are early 19th century houses that have been converted into two dwellings. They are three storeys tall and have two windows on the front. The buildings are constructed of stock brick and feature a stucco frieze and cornice, along with a stone-coped brick parapet. The sash windows, which have glazing bars, are set within stucco lined reveals and are topped with gauged flat brick arches. On the ground floor, there is a tripartite window beneath a wide elliptical gauged brick arch. To the right, there is a five-panel door flanked by fluted pilasters, topped with a cornice head and a plain fanlight. A later half-glazed door has been inserted to the left.
Local climate
20 and 20a, Old Town sits in one of the driest parts of the UK, with an average of 690 mm of rain a year. This makes it drier than 95% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 98% of listed buildings.
It experiences an average of 35 freeze-thaw cycles a year, more than 57% of listed buildings. Of these, 16 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
- No related consent applications matched
- 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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