Flat 6, 1 Onslow Gardens, London, SW7 3LX
About Flat 6
Flat 6 is a three-bedroom mid-terrace house in London (SW7 3LX). It has a recorded floor area of 154 m² (around 1658 sq ft), construction records dating it to before 1900 and council tax band H. The latest certificate (June 2023) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 66). Other recorded features include a balcony and outbuildings. Period features are noted in the property record.
It hasn't traded since January 2001, a hold of 25 years that's notably long for the area. At 154 m² it's 21.3% larger than the typical home in the postcode (127 m² median across 11 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 1997–2001, sale prices on this property compounded at 22.5% per year. Today's modelled estimate of £3,792,000 sits 276.4% above the 2001 sale of £1,007,500.
Know exactly what you're buying at Flat 6
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Launch offer · save £5
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms3
- Bathrooms2
- Dining roomYes
Outside
- Communal gardenYes
- BalconyYes
- OutbuildingsYes
Building
- LiftYes
- ConciergeYes
- Period featuresYes
Energy performance
Flat 6 sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Planning history
Flat 6 has no planning applications on record.
Notable planning nearby
8applications of note in the surrounding area
We flagged 2 things worth checking at Flat 6
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
Sale price has at least doubled since 1997.
£3,792,000
Modelled from EPC, postcode comparables and a sale-price growth of 22.5% per year over 4 years.
£1,007,500
Growth on file: 22.5% per year over 4 years.
Sales timeline
31 January 2001Most recent
£1,007,500
+103.5%over 3 years30 July 1997
£495,000
Median price across the last 5 sales in SW7 3LX: £900,000 (2022–2011).
Nearby sales in SW7 3LX
Flat 5, 1 Onslow Gardens, London, SW7 3LX
Sold Jan 2022
£313,750Flat 7, 1 Onslow Gardens, London, SW7 3LX
Sold Dec 2021
£1,500,000Flat 2, 1 Onslow Gardens, London, SW7 3LX
Sold Sept 2017
£12,000,000Flat 4, 1 Onslow Gardens, London, SW7 3LX
Sold Nov 2011
£900,000Flat 3, 4 Onslow Gardens, London, SW7 3LX
Sold Jul 2002
£395,000
Everything we know about Flat 6, 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 Onslow Gardens homes
Flat 6 outperforms the street on years held by a wide margin.
Price per m²
£6,542
Street avg £22,361
Floor Area
154 m²
Street avg 142 m²
Habitable Rooms
6 rooms
Street avg 4 rooms
CO₂ Emissions
7.3 t/year
Street avg 4.8 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
10/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Onslow Gardens South Kensington — bus stop.
Closest school
0.3 km
Our Lady of Victories RC Primary School. 61 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
59.1dB
Night-time· 23:00 – 07:00
48.8dB