23a, Spencer Road, Isleworth, TW7 4BN
About 23a
23a is a semi-detached house in Isleworth (TW7 4BN). It has a recorded floor area of 24 m² (around 258 sq ft), construction records dating it to 1996-2002 and council tax band A. The latest certificate (March 2022) shows a D (score 58), a step below the typical UK home. When first surveyed in September 2018 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Average to Good, roof efficiency went from Poor to Average and lighting went from Good to Very Good. The recommended improvements would lift it to A (score 92), a 3-band jump. Main heating runs on electricity.
Today's modelled estimate of £218,000 is 41.1% below the 2014 sale of £370,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£1,432/sq ft) was about 369.7% above the typical sold price in the postcode. At 24 m² it sits well below the postcode median (77 m² across 32 EPCs), making it one of the more compact homes locally. On the market in November 2014 and unlisted since — roughly 12 years. 3 planning records sit against the property, 0 approved, 3 refused.
Know exactly what you're buying at 23a
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
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Wall insulation upgraded
Roof insulation improved
Floor insulation added or improved
More low energy lighting installed
Planning history
- Oct 2017Garage ConversionFullIn report
Change of use of the existing garage with external alterations to a gym area in the existing outbuilding
- Documents
- 1 doc on file
- Reference
- P/2017/3637
- Mar 2017Garage ConversionFullIn report
Change of use of the existing garage with external alterations to enlarge the living accommodation in the existing outbuilding.
- Reference
- P/2017/0190
We flagged 2 things worth checking at 23a
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
£218,000
Modelled from EPC, postcode comparables.
£370,000
Recorded with HM Land Registry.
Sales timeline
20 November 2014Most recent
£370,000
Median price across the last 5 sales in TW7 4BN: £450,000 (2025–2021).
Nearby sales in TW7 4BN
Everything we know about 23a, 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 Spencer Road homes
On price per m², 23a stands well clear of the street.
Price per m²
£15,417
Street avg £4,078
Floor Area
24 m²
Street avg 81 m²
Habitable Rooms
2 rooms
Street avg 4 rooms
CO₂ Emissions
1.8 t/year
Street avg 5.7 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
0.3 km
Gresham Road Lampton — bus stop.
Closest school
0.6 km
Spring Grove Primary School. 46 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
54.4dB
Night-time· 23:00 – 07:00
44.8dB