12 Gisbey House, Union Lane, Isleworth, TW7 6GH
About 12 Gisbey House
12 Gisbey House is a two-bedroom mid-terrace house in Isleworth (TW7 6GH). It has a recorded floor area of 64 m² (around 689 sq ft), construction records dating it to 2003-2006 and council tax band D. The latest certificate (December 2020) shows a C (score 79), near the top of the C band. Earlier certificates rated it B (March 2010); the latest reading is one band lower. Between certificates, wall efficiency dropped from Very Good to Good. At 64 m² this is the 16th smallest of 27 units on EPC record in the building, where floor areas span 48–68 m². The building's EPC ratings span D to B across 27 units on file.
It hasn't traded since June 2010, a hold of 16 years that's notably long for the area. At 64 m² it's 17.1% larger than the typical home in the postcode (55 m² median across 26 EPCs). Today's modelled estimate of £321,000 is 37.8% above the 2010 sale price.
Know exactly what you're buying at 12 Gisbey House
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
- Bedrooms2
- Bathrooms1
Outside
- Communal gardenYes
- ParkingOff road
Building
- LiftYes
- RefurbishedYes
Energy performance
12 Gisbey House's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Floor insulation added or improved
More low energy lighting installed
Planning history
12 Gisbey House has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 2 things worth checking at 12 Gisbey House
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
30-day money-back guarantee
Sales history & valuation
12 Gisbey House valuation sits well clear of the typical sold price in this postcode.
£321,000
Modelled from EPC, postcode comparables.
£233,000
Recorded with HM Land Registry.
Sales timeline
10 June 2010Most recent
£233,000
Median price across the last 5 sales in TW7 6GH: £260,000 (2024–2021).
Nearby sales in TW7 6GH
14 Gisbey House, Union Lane, Isleworth, TW7 6GH
Sold Jun 2024
£255,00018 Gisbey House, Union Lane, Isleworth, TW7 6GH
Sold Feb 2024
£260,00011 Gisbey House, Union Lane, Isleworth, TW7 6GH
Sold Dec 2021
£250,0009 Gisbey House, Union Lane, Isleworth, TW7 6GH
Sold Apr 2021
£320,0006 Gisbey House, Union Lane, Isleworth, TW7 6GH
Sold Oct 2019
£265,000
Everything we know about 12 Gisbey House, 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 Union Lane homes
12 Gisbey House outperforms the street on years held by a wide margin.
Price per m²
£3,641
Street avg £4,694
Floor Area
64 m²
Street avg 57 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
1.5 t/year
Street avg 1.0 t/year
Similar properties nearby
1 Hawkfield Court, Woodlands Grove
TW7 6NU
1 Chase Court, Amhurst Gardens
TW7 6AH
1 Gumley Gardens
TW7 6PW
1 Busch Close
TW7 6UE
1 Bridge Wharf Road
TW7 6BS
1 Christabel Close
TW7 6EJ
1 Church Street
TW7 6BL
1 Gisbey House, Union Lane
TW7 6GH
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
0.0 km
Teesdale Gardens — bus stop.
Closest school
0.2 km
The Green School for Boys. 41 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
44.1dB