20 and 21, Thames Street is a Grade II listed building in the Windsor and Maidenhead local planning authority area, England. First listed on 2 October 1975. Building. 1 related planning application.
20 and 21, Thames Street
- WRENN ID
- sleeping-buttress-thunder
- Grade
- II
- Local Planning Authority
- Windsor and Maidenhead
- Constituency
- Windsor MP: Jack Rankin (Con)
- Country
- England
- Date first listed
- 2 October 1975
- Type
- Building
- Address
- 20 and 21, Thames Street, SL4 1PL
- OS grid reference
- SU 967 770
- Coordinates
- 51.48388, -0.60858
- Source
- Historic England listing
Description
Nos 20 and 21 on Thames Street are a pair of narrow-fronted buildings from the late 18th century, with some alterations. They are constructed of red brick, with No 21 featuring a chequered pattern. There is a band between the storeys and a cornice below the parapets. Both buildings have mansard roofs, each with one dormer; No 20 is covered with old tiles, while No 21 has a slate roof. No 20 has wooden casements, and No 21 has 19th-century sash windows. Each upper floor has two windows in flush architrave frames with flat gauged rubbed arches. The shop fronts are plain. These buildings are part of an important group that includes No 2 Thames Street, Knights Tavern, and Nos 5 to 16 and 18 to 25 Thames Street.
Local climate
20 and 21, Thames Street sits in a drier-than-average part of the UK, with an average of 710 mm of rain a year. This makes it drier than 87% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 82% of listed buildings.
It experiences an average of 32 freeze-thaw cycles a year, fewer than 59% of listed buildings. Of these, 13 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 — 2 transactions since 2003
- 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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