Alginate House is a Grade II listed building in the Westminster local planning authority area, England. First listed on 15 January 1973. Professional chambers, apartments. 8 related planning applications.
Alginate House
- WRENN ID
- tall-pediment-saffron
- Grade
- II
- Local Planning Authority
- Westminster
- Constituency
- Cities of London and Westminster MP: Rachel Blake (Lab)
- Country
- England
- Date first listed
- 15 January 1973
- Type
- Professional chambers, apartments
- Address
- Alginate House, 22, Henrietta Street Wc2, City of Westminster, WC2E 8ND
- OS grid reference
- TQ 302 807
- Coordinates
- 51.51092, -0.12444
- Source
- Historic England listing
Description
Alginate House is a Grade II listed building located on Henrietta Street in the City of Westminster. It was constructed between 1857 and 1858 by Charles Gray and serves as professional chambers and apartments. The building features a stucco exterior and has a concealed roof, showcasing an eclectic design inspired by the Florentine quattrocento palazzo style.
It stands four storeys tall with a basement and has a double fronted façade that is three windows wide, with a slightly narrower return. The ground and first floors are designed as one tall podium, marked at the corners by massive channelled quoin piers. The central doorway is "Romanesque" in style, featuring a shafted design and is topped by a bracketed cornice hood. Flanking windows are framed by pilasters and have tympani above them, with cornice hoods serving as sills for the first-floor windows, which are also pilastered and hooded.
On the second floor, there are widely spaced "Romanesque" arched pilastered windows, while the third floor features an arcaded range of nine windows, some of which are blind. This upper section is topped by a prominent bracketed and machicolated eaves cornice. The building also has a moulded sill course on the second floor and a band sill course at the top floor, with a similar but closer spaced design on the return side.
Local climate
Alginate House 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
- Related listed building consents — 8 applications
- 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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