21 Cranmore Avenue, Isleworth, TW7 4QW
About 21 Cranmore Avenue
21 Cranmore Avenue is a semi-detached house in Isleworth (TW7 4QW). It has a recorded floor area of 108 m² (around 1161 sq ft), construction records dating it to 1930-1949 and council tax band F. The latest certificate (October 2008) shows a D (score 56), a step below the typical UK home. The latest certificate is from October 2008, so improvements made since then won't be reflected.
It hasn't traded since November 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £714,000 sits 55.2% above the 2009 sale of £460,000. At 108 m² it sits well below the postcode median (175 m² across 14 EPCs), making it one of the more compact homes locally. 3 planning records sit against the property, 3 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved.
Know exactly what you're buying at 21 Cranmore Avenue
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
21 Cranmore Avenue's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 14 Oct 2018
EPC Rating
Planning history
21 Cranmore Avenue has 2 separate extension applications on the council record.
- Sept 2010ExtensionFullIn report
Extension: Side and rear of property
Erection of a ground floor side and rear extension to the house.
- Reference
- P/2010/1788
- May 2010OutlineIn report
Certificate of Lawfulness for the proposed alteration of a hipped roof to a gable construction of a rear roof extension of a gable end window.
- Reference
- P/2010/0699
We flagged 2 things worth checking at 21 Cranmore Avenue
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Signs of HMO activity in the area
- Larger development activity nearby
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Sales history & valuation
The latest sale fell during the post-2008 dip, often a low-water mark in price comparisons.
£714,000
Modelled from EPC, postcode comparables.
£460,000
Recorded with HM Land Registry.
Sales timeline
12 November 2009Most recent
£460,000
Median price across the last 5 sales in TW7 4QW: £900,000 (2025–2022).
Nearby sales in TW7 4QW
Everything we know about 21 Cranmore Avenue, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area
- Larger development activity nearby
Versus other Cranmore Avenue homes
Habitable Rooms for 21 Cranmore Avenue lags the street by a wide margin.
Price per m²
£4,263
Street avg £4,774
Floor Area
108 m²
Street avg 188 m²
Habitable Rooms
4 rooms
Street avg 8 rooms
CO₂ Emissions
5.8 t/year
Street avg 5.3 t/year
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Osterley Underground Station — subway entrance.
Closest school
0.9 km
Isleworth and Syon School for Boys. 48 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode
Daytime· 07:00 – 23:00
52.3dB
Night-time· 23:00 – 07:00
44.4dB