Our Data Sources
Flat 7, John Day House, Isleworth has a single entry in the Land Registry from August 2013 and a single entry in the EPC database dated June 2026.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 3 out of 5 and is considered of medium accuracy.
Price Range & Condition
In very good condition, we estimate Flat 7, John Day House, Isleworth would be worth £696,267, with a potential rental value of £3,068 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £616,694, with a rental value of £2,718 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Energy Efficiency
Flat 7, John Day House, Isleworth has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 23 Jun 2026.
The property is connected to mains gas and has multiple glazing throughout. It is heated using Boiler and radiators, mains gas.
Sold Prices
Flat 7, John Day House, Isleworth last changed hands on 30th August 2013, selling for £450,000. The transaction was logged as a leasehold flat by HM Land Registry.
That is its only recorded sale since 1995.
The market for similar properties has dropped by 21.2% since August 2013.
- Sold Aug 2013£450,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 59 sales of comparable properties within 520 metres of Flat 7, John Day House, Isleworth across the last 2 years.
Most recently, Flat 69, Lion Court, Swan Street, Isleworth, TW7 6YA, a leasehold flat, sold at £727,500 on the 17th March 2026.
Read more about house prices in TW7.
- Sold Mar 2026£727,500 | 3 Bed FlatFlat 69, Lion Court, Swan Street, Isleworth, TW7 6YAFlat 69, Lion Court, Swan Street, Isleworth, TW7 6YA
- Sold Jul 2025£645,000 | 3 Bed FlatFlat 22, Lion Court, Lion Wharf Road, Isleworth, TW7 6XXFlat 22, Lion Court, Lion Wharf Road, Isleworth, TW7 6XX
- Sold Jun 2025£610,000 | 3 Bed FlatFlat 20, Swan Court, Swan Street, Isleworth, TW7 6XWFlat 20, Swan Court, Swan Street, Isleworth, TW7 6XW
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks Flat 7, John Day House, Isleworth as the 3rd largest and the 3rd most expensive of the 40 addresses on Lower Square, Isleworth, TW7.
Against the TW7 postcode district average, it is £157k more expensive than the typical property.
More reading links
Schools Nearby
- The Blue School CofE Primary100 m away
- St Mary's Catholic Primary School, Isleworth300 m away
- Worple Primary School400 m away
- Gumley House RC Convent School, FCJ500 m away
- The Green School for Boys900 m away
- The Green School for Girls1.1 km away
More reading links
Public Transport Nearby
- Isleworth|1.1 km away
- Syon Lane|1.4 km away
- Richmond|1.6 km away
Available Internet Speeds
Ofcom's latest figures show superfast broadband available in this area.
According to recent data from Ofcom, Superfast Broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
