Syon House
SYON HOUSE, PARK ROAD
Listed on the National Heritage List for England. Search over 400,000 listed places
Overview
- Heritage Category:
- Listed Building
- Grade:
- I
- List Entry Number:
- 1080318
- Date first listed:
- 15-Jun-1951
- List Entry Name:
- Syon House
- Statutory Address:
- SYON HOUSE, PARK ROAD
Location
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Images of England Project
- Date:
- 2003-05-05
- Reference:
- IOE01/10632/37
- Rights:
- © Mr Adam Watson. Source: Historic England Archive
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Discover moreOfficial list entry
- Heritage Category:
- Listed Building
- Grade:
- I
- List Entry Number:
- 1080318
- Date first listed:
- 15-Jun-1951
- List Entry Name:
- Syon House
- Statutory Address 1:
- SYON HOUSE, PARK ROAD
The scope of legal protection for listed buildings
This List entry helps identify the building designated at this address for its special architectural or historic interest.
Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.
For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.
The scope of legal protection for listed buildings
This List entry helps identify the building designated at this address for its special architectural or historic interest.
Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.
For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.
Location
- Statutory Address:
- SYON HOUSE, PARK ROAD
The building or site itself may lie within the boundary of more than one authority.
- County:
- Greater London Authority
- District:
- Hounslow (London Borough)
- Parish:
- Non Civil Parish
- National Grid Reference:
- TQ 17282 76685
Details
1. 4419 PARK ROAD, ISLEWORTH Syon House TQ 1776 33/361 15.6.51.
II GV
2. Built on remains of a Brigittine Abbey nunnery (1430-70). Part of C15 undercroft remains. Protector Somerset reconstructed the house in 1547-52, substantially in its present shape. The house, 3-storeys with crenellated top and gable turrets, is built on a hollow square. East front ground floor loggia mid C17. Remodelled inside and out by Robert Adam 1767-5. In 1874 the Percy Lion, transferred from Old Northumberland House at Charing Cross was erected on the river front. Slight war damage, 2nd floor of North West tower rebuilt; 2 statues on columns in anteroom destroyed. Vide RCHM; p86; Country Life V, p112, XLVI, pp728, 802, 838, 874. Associated with the house; Catherine Howard 1541-2, Protector Somerset, executed 1552; John, Duke of Northumberland and Lady Jane Grey, both executed 1553; the nuns recalled from the Netherlands 1557-8; Henry Percy, Earl of Northumberland, involved in the Gunpowder plot; the children of Charles I; Charles II in the plague of 1665 and the Dukes of Northumberland of 1766 who still hold it.
Syon House and its Lodges form a grade I group.
Listing NGR: TQ1728276685
Legacy
The contents of this record have been generated from a legacy data system.
- Legacy System number:
- 202629
- Legacy System:
- LBS
Sources
Books and journals
Country Life in Country Life, Vol. 5, (), 112
Country Life in Country Life, Vol. 5, (), 728+802
Country Life in Country Life, Vol. 5, (), 838+874
Other
Register of Parks and Gardens of Special Historic Interest in England, Part 17 Greater London
Inventory of the Historical Monuments of Middlesex, (1937)
Legal
This building is listed under the Planning (Listed Buildings and Conservation Areas) Act 1990 as amended for its special architectural or historic interest.
Map
This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 05-Jul-2026 at 17:01:37.
Download a full scale map (PDF)End of official list entry
All text content is available under the Open Government Licence v3.0 , except where otherwise stated. Any supplied maps are © Crown Copyright [and database rights] 2026 OS AC0000815036 and may not be reproduced without permission.