Syon House Conservatory is a Grade I listed building in the Hounslow local planning authority area, England. First listed on 15 June 1951. Conservatory.
Syon House Conservatory
- WRENN ID
- idle-chamber-poplar
- Grade
- I
- Local Planning Authority
- Hounslow
- Constituency
- Brentford and Isleworth MP: Ruth Cadbury (Lab)
- Country
- England
- Date first listed
- 15 June 1951
- Type
- Conservatory
- Address
- Syon House Conservatory, Park Road
- OS grid reference
- TQ 172 768
- Coordinates
- 51.47856, -0.31265
- Source
- Historic England listing
Description
Syon House Conservatory was built around 1830, designed by architect Charles Fowler and head gardener Richard Forrest for the Duke of Northumberland. The structure features a central parabolic dome and quadrant wings, with a pedimented front in the center and pedimented ends on the wings. It is faced with Bath stone, while the majority of the building is made of glass supported by a cast iron frame with columns. Although the interior has been altered, it still retains original details, including "Tower of the Winds" capitals. This conservatory is noted as "the first metallic horticultural structure of any importance" according to Edward Walford in 'Greater London'. References to the conservatory can be found in "Gardener's Magazine" and "Architectural Magazine", as well as in "History and Antiquities of Syon Monastery" published in 1840. A drawing of the Syon Conservatory was exhibited by Fowler at the Royal Academy in 1849.
Local climate
Syon House Conservatory sits in one of the driest parts of the UK, with an average of 700 mm of rain a year. This makes it drier than 92% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 90% of listed buildings.
It experiences an average of 30 freeze-thaw cycles a year, fewer than 64% 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.
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- No EPC on record for this property
- 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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Nearby listed buildings
- Stone Vases in Front of Syon House Conservatory
- Garden Pedestal and Vase in Syon Park
- The Dairy at Syon Park
- Retaining Walls of Garden Pool, and Statue in Syon Park
- Abbey Barn and Attached Wall and Gateway
- Stables of Syon Park
- Former Riding School of Syon Park
- Sundial (Between Farm House Lodges)
- Syon House
- Gate Lodge to Syon House