Our Data Sources
5, Northumberland Avenue, Isleworth has 31 entries in the Land Registry , most recently in February 2021 and a single entry in the EPC database dated September 2016.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 1 out of 5 and is considered of low accuracy.
Price Range & Condition
In very good condition, we estimate 5, Northumberland Avenue, Isleworth would be worth £705,651, with a potential rental value of £2,644 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £625,005, with a rental value of £2,342 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
5, Northumberland Avenue, Isleworth occupies a 285 m2 plot as recorded by HM Land Registry.
All 5 other houses in this postcode have recorded plot sizes, and this one ranks as the 3rd largest.
Energy Efficiency
5, Northumberland Avenue, Isleworth has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 22 Sep 2016.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
5, Northumberland Avenue, Isleworth last changed hands on 23rd February 2021, selling for £650,000. The transaction was logged as a freehold house by HM Land Registry.
In total it has sold 3 times since 1995.
The market for similar properties has dropped by 11.6% since February 2021.
- Sold Feb 2021£650,000
- Sold Aug 2003£313,500
- Sold Oct 2001£243,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 171 sales of comparable properties within 470 metres of 5, Northumberland Avenue, Isleworth across the last 2 years.
Most recently, 60, Harewood Road, Isleworth, TW7 5HL, a freehold house, sold at £837,500 on the 2nd October 2025.
Read more about house prices in TW7.
- Sold Oct 2025£837,500 | 4 Bed House60, Harewood Road, Isleworth, TW7 5HL60, Harewood Road, Isleworth, TW7 5HL
- Sold Apr 2025£750,000 | 4 Bed House4, Albury Avenue, Isleworth, TW7 5HX4, Albury Avenue, Isleworth, TW7 5HX
- Sold Dec 2021£635,000 | 3 Bed House40, Harewood Road, Isleworth, TW7 5HL40, Harewood Road, Isleworth, TW7 5HL
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Properties Let Nearby
Agents in our network have reported 1 letting within 470 metres of 5, Northumberland Avenue, Isleworth across the last 2 years.
The newest of these is 40, Syon Park Gardens, Isleworth, TW7 5NB, a freehold house let by Jorgensen Turner in August 2023.
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
Location Comparison
Our analysis of the public data ranks 5, Northumberland Avenue, Isleworth as the 27th largest and the 33rd most expensive of the 46 addresses on Northumberland Avenue, Isleworth, TW7.
Against the TW7 postcode district average, it is £165k more expensive than the typical property.
More reading links
Schools Nearby
- Marlborough Primary School400 m away
- The Smallberry Green Primary School600 m away
- Isleworth Town Primary School700 m away
- The Green School for Girls600 m away
- Isleworth and Syon School for Boys600 m away
- The Green School for Boys700 m away
More reading links
Public Transport Nearby
- Syon Lane|600 m away
- Isleworth|600 m away
- Osterley|1.3 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.
