221a, Spring Grove Road, Isleworth, TW7 4AF
About 221a
221a is a mid-terrace house in Isleworth (TW7 4AF). It has a recorded floor area of 51 m² (around 549 sq ft), construction records dating it to before 1900 and council tax band B. At 51 m² this is the 2nd smallest of 9 units on EPC record in the building, where floor areas span 50–123 m². The building's EPC ratings span F to D, with this unit at the top. The latest certificate (July 2020) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in May 2010 the rating was E, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Very Good. The recommended improvements would push it to C (score 75).
At 51 m² it sits well below the postcode median (81 m² across 8 EPCs), making it one of the more compact homes locally. Across 2008–2013, sale prices on this property compounded at 3.3% per year. Today's modelled estimate of £334,000 is 39.2% above the 2013 sale price. On a £-per-square-foot basis, the last sale (£437/sq ft) was about 85.7% above the typical sold price in the postcode. Last sold in August 2013, so it's been off the market for around 13 years.
Know exactly what you're buying at 221a
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
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
Single glazing replaced with double or better glazing
Planning history
221a has no planning applications on record.
Notable planning nearby
8applications of note in the surrounding area
We flagged 2 things worth checking at 221a
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
221a valuation sits well clear of the typical sold price in this postcode.
£334,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.3% per year over 6 years.
£240,000
Growth on file: 3.3% per year over 6 years.
Sales timeline
29 August 2013Most recent
£240,000
+20.0%over 5 years10 January 2008
£200,000
Median price across the last 5 sales in TW7 4AF: £415,000 (2025–2011).
Nearby sales in TW7 4AF
213 Spring Grove Road, Isleworth, TW7 4AF
Sold Apr 2025
£580,000217 Spring Grove Road, Isleworth, TW7 4AF
Sold Oct 2023
£285,000225 Spring Grove Road, Isleworth, TW7 4AF
Sold May 2012
£415,000223 Spring Grove Road, Isleworth, TW7 4AF
Sold Jul 2011
£445,000215 Spring Grove Road, Isleworth, TW7 4AF
Sold Dec 2008
£250,000
Everything we know about 221a, 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 Spring Grove Road homes
221a outperforms the street on epc rating by a wide margin.
Price per m²
£4,706
Street avg £3,897
Floor Area
51 m²
Street avg 53 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
2.5 t/year
Street avg 3.3 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
Thornbury Road — bus stop.
Closest school
0.2 km
West Thames College. 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
53.7dB
Night-time· 23:00 – 07:00
43.8dB