Our Data Sources
15, Penwerris Avenue, Isleworth has a single entry in the Land Registry from March 2021 and a single entry in the EPC database dated December 2020.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 2 out of 5 and is considered of medium accuracy.
Price Range & Condition
In very good condition, we estimate 15, Penwerris Avenue, Isleworth would be worth £832,392, with a potential rental value of £2,949 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £737,262, with a rental value of £2,612 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
15, Penwerris Avenue, Isleworth occupies a 396 m2 plot as recorded by HM Land Registry.
All 19 other houses in this postcode have recorded plot sizes, and this one ranks as the 10th largest.
Energy Efficiency
15, Penwerris Avenue, Isleworth has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 02 Dec 2020.
The property is connected to mains gas and has mostly double glazing. It is heated using Boiler and radiators, mains gas.
Sold Prices
15, Penwerris Avenue, Isleworth last changed hands on 12th March 2021, selling for £745,000. The transaction was logged as a freehold house by HM Land Registry.
That is its only recorded sale since 1995.
The market for similar properties has dropped by 8.4% since March 2021.
- Sold Mar 2021£745,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 72 sales of comparable properties within 670 metres of 15, Penwerris Avenue, Isleworth across the last 2 years.
Most recently, 11, Cranmore Avenue, Isleworth, TW7 4QW, a freehold house, sold at £876,000 on the 29th August 2025.
Read more about house prices in TW7.
- Sold Aug 2025£876,000 | 3 Bed House11, Cranmore Avenue, Isleworth, TW7 4QW11, Cranmore Avenue, Isleworth, TW7 4QW
- Sold Jul 2025£822,500 | 4 Bed House106, Bassett Gardens, Isleworth, TW7 4QY106, Bassett Gardens, Isleworth, TW7 4QY
- Sold Jun 2021£745,000 | 4 Bed House23, Penwerris Avenue, Isleworth, TW7 4QT23, Penwerris Avenue, Isleworth, TW7 4QT
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks 15, Penwerris Avenue, Isleworth as the 27th largest and the 24th most expensive of the 40 addresses on Penwerris Avenue, Isleworth, TW7.
Against the TW7 postcode district average, it is £286k more expensive than the typical property.
More reading links
Schools Nearby
- Alexandra Primary School900 m away
- Spring Grove Primary School1.0 km away
- Heston Primary School1.1 km away
- Isleworth and Syon School for Boys900 m away
- Lampton Academy1.0 km away
- Heston Community School1.0 km away
More reading links
Public Transport Nearby
- Osterley|300 m away
- Hounslow East|900 m away
- Hounslow Central|1.4 km away
Available Internet Speeds
Ofcom's latest figures show ultrafast broadband available in this area.
According to recent data from Ofcom, Ultrafast Broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
