Property data
Sale history
Price Date Annual growth After inflation
£700,000 * Aug 2022 4.4% 2.1%
£250,000 Nov 1998 na na

*This price paid record has been flagged by Land Registry as a 'Category B: Additional Price Paid entry'. This could be due to a variety of reasons, such as the sale being a buy-to-let purchase, a repossession or a transfer to a limited company. When Land Registry suspects that a sale does not reflect full market value (e.g. part-ownership or right to buy), these transactions can be flagged as well. For this reason, we exclude them from our area statistics.

Floor plan
Floorplan 21
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Internal area
169 square metres (1,819 square feet) according to latest EPC inspection
£ per square meter (foot)
£4,142 per sqm (£385 per sqft) in Aug 2022. For context, homes in Osterley are now selling for between £4,830 and £6,150 per square metre (£448 and £571 per square foot) . See the analysis of Osterley TW7-4 housing market.
Valuation comparables
Infer the current value by seeing what similar properties have sold for recently. To view this list for 21, Thornbury Avenue using the valuation comparables search tool, join now.
Bedrooms
4
Type
Semi-detached
Council tax band
F
Plot size
245 square metres (2,637 square feet) - map showing freehold boundary lines
Archived listings
History:
Archived sales listing for 21 Thornbury Avenue. Advertised on multiple portals. It was added on 07/01/2022. It last appeared Feb 2023.
Photos:

There are 12 historic photos of 21 Thornbury Avenue.

Photos for 21 Thornbury Avenue
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Advertiser remarks:
  • 5 bedrooms
  • 3 bathrooms
Planning applications
Planning ref:
May 2025 P/2025/0664
Type:
Full and householder planning application
Status:
Application approved
Address:
21 Thornbury Avenue, Isleworth,
Description:
Retrospective application for the erection of a rear roof extension

Planning ref:
January 2024 P/2023/3572
Type:
Full and householder planning application
Status:
Application refused
Address:
21 THORNBURY AVENUE ISLEWORTH
Description:
Retrospective application for the erection of a rear canopy to the house

Planning ref:
January 2023 P/2022/3658
Type:
Full and householder planning application
Status:
Application approved
Address:
21 THORNBURY AVENUE, ISLEWORTH,
Description:
Erection of rear roof extension to the house

Planning ref:
January 2023 P/2022/3410
Type:
Full and householder planning application
Status:
Application approved
Address:
21 THORNBURY AVENUE, ISLEWORTH,
Description:
Conversion of ground floor rear conservatory into a habitable space to the house and replacement roof.

Planning ref:
November 2022 P/2022/3188
Type:
Outline application - proposal prior to a full application, including assessments and scoping opinions.
Status:
Application refused
Address:
21 THORNBURY AVENUE, ISLEWORTH,
Description:
Certificate of Lawfulness for proposed erection of a rear roof extension with hip to gable and front, rear & side roof windows.
EPC Inspections
Summary:
25 February 2020 - energy performance certificate grade D
Reason for EPC:
marketed sale
Tenure:
Owner-occupied
Property type:
Semi-Detached House , has 6 habitable rooms. Estimated year built 1930 to 1949
Area:
169 sqm (1,819 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: Pitched, 100 mm loft insulation. Heating: Boiler and radiators, mains gas.