Flat 1, 4 Onslow Gardens, London, SW7 3LX
About Flat 1
Flat 1 is a mid-terrace house in London (SW7 3LX). It has a recorded floor area of 142 m² (around 1528 sq ft), construction records dating it to before 1900 and council tax band H. At 142 m² this is the largest unit on EPC record across the building (62–142 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (51 versus a best of 71). The latest certificate (June 2018) shows an E (score 51), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 78), a 2-band jump.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement.
Know exactly what you're buying at Flat 1
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
Energy performance
Flat 1 sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Planning history
Flat 1 has no planning applications on record.
Notable planning nearby
8applications of note in the surrounding area
We flagged 2 things worth checking at Flat 1
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
Flat 1 has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£2,549,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
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 1, 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 1 is notably below the street on epc rating.
EPC Rating
51 (E)
Street avg 66 (D)
Floor Area
142 m²
Street avg 143 m²
CO₂ Emissions
7.4 t/year
Street avg 4.8 t/year
Habitable Rooms
5 rooms
Street avg 4 rooms
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13a, Flat 1, Cranley Gardens, Kensington And Chelsea
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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