623 London Road, Isleworth, TW7 4ER
About 623 London Road
623 London Road is a four-bedroom semi-detached house in Isleworth (TW7 4ER). It has a recorded floor area of 115 m² (around 1238 sq ft), construction records dating it to 1930-1949 and council tax band F. The latest certificate (October 2013) shows a D (score 59), a step below the typical UK home. When first surveyed in March 2012 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Poor to Average, window efficiency went from Poor to Good and hot-water efficiency went from Poor to Good; while lighting dropped from Very Good to Poor. The recommended improvements would lift it to B (score 83), a 2-band jump. The latest certificate is from October 2013, so improvements made since then won't be reflected. Our model identifies extension potential, subject to local planning policy.
On the market in November 2014 and unlisted since — roughly 12 years. Across the public record there are 4 sales, relatively high churn for a single property. 2 planning records sit against the property, 1 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. At 115 m² it's 17.3% larger than the typical home in the postcode (98 m² median across 7 EPCs). Across 2002–2014, sale prices on this property compounded at 6.4% per year. Today's modelled estimate of £692,000 is 42.7% above the 2014 sale price.
Know exactly what you're buying at 623 London Road
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
What this property has
Inside
- Bedrooms4
- Bathrooms1
- EnsuiteYes
Outside
- ParkingOff street
Building
- Extension potentialPossible
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 20 Oct 2023
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Hot water system upgraded
Windows upgraded, improving insulation
Roof insulation improved
Low energy lighting percentage decreased
Planning history
- Sept 2013FullIn report
Joint application for the re-positioning of the existing vehicular access and creation of additional vehicular access to the front of both properties
- Documents
- 9 docs on file
- Reference
- P/2013/2650
- Mar 2013ExtensionFullIn report
Extension: Single storey · Rear of property
Erection of a single storey rear extension to the property and erection of a single storey outbuilding in the rear garden to replace existing outbuilding.
- Reference
- P/2013/0107
We flagged 2 things worth checking at 623 London Road
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
623 London Road has more than doubled in price since the earliest registered sale in 2002.
£692,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.4% per year over 12 years.
£485,000
Growth on file: 6.4% per year over 12 years.
Sales timeline
28 November 2014Most recent
£485,000
+46.5%over 2 years21 November 2012
£331,000
+1.8%over 9 years2 October 2003
£325,000
+39.8%over 9 months20 December 2002
£232,500
Median price across the last 5 sales in TW7 4ER: £275,000 (2022–2004).
Nearby sales in TW7 4ER
Everything we know about 623 London Road, 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 London Road homes
On co₂ emissions, 623 London Road runs well behind the street norm.
Price per m²
£4,217
Street avg £3,730
Floor Area
115 m²
Street avg 102 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
5.1 t/year
Street avg 4.1 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
0.1 km
Star Road — bus stop.
Closest school
0.2 km
Spring Grove Primary School. 47 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
53.1dB

Night-time· 23:00 – 07:00
43.0dB