9a, Onslow Square, Kensington And Chelsea, London, SW7 3NJ
About 9a
9a is an end-of-terrace house in Kensington And Chelsea, London, London (SW7 3NJ). It has a recorded floor area of 72 m² (around 775 sq ft), construction records dating it to before 1900 and council tax band F. At 72 m² this is the 5th smallest of 15 units on EPC record in the building, where floor areas span 34–173 m². The building's EPC ratings span F to B across 15 units on file. The latest certificate (July 2018) shows a D (score 66), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 78).
At 72 m² it sits well below the postcode median (110 m² across 35 EPCs), making it one of the more compact homes locally. 4 planning records sit against the property, 4 approved, 0 refused. Past consents include new windows, meaningful when judging how the property has evolved.
Know exactly what you're buying at 9a
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
EPC Rating
Planning history
9a has been through 4 approved planning applications — a well-evolved property.
- Aug 2018ConditionsIn report
Details required by condition 4 (windows & doors) of listed building consent 17/07602 (Replacement of four windows with timber sash windows and replacement of one window opening with timber French doors at lower ground floor level)
- Council
- Thurloe and Smith's Charity
- Documents
- 3 docs on file
- Reference
- CON/18/03684
- Aug 2018ConditionsIn report
Details required by condition 3 (windows & doors) of planning permission 17/07601 (Replacement of four windows with timber sash windows and replacement of one window opening with timber French doors at lower ground floor level)
- Council
- Thurloe and Smith's Charity
- Documents
- 6 docs on file
- Reference
- CON/18/03683
We flagged 2 things worth checking at 9a
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
9a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£955,000
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 3NJ: £2,800,000 (2024–2022).
Nearby sales in SW7 3NJ
Flat 2, 23 Onslow Square, London, SW7 3NJ
Sold Nov 2024
£2,825,000Flat 12, 25 Onslow Square, Kensington And Chelsea, London, SW7 3NJ
Sold Oct 2024
£560,000Flat 11, 25 Onslow Square, Kensington And Chelsea, London, SW7 3NJ
Sold Jul 2023
£1,600,000Flat 3, 23 Onslow Square, London, SW7 3NJ
Sold May 2023
£2,800,000Flat 1, 17 Onslow Square, London, SW7 3NJ
Sold Aug 2022
£3,600,000
Everything we know about 9a, 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 Square homes
Floor Area for 9a lags the street by a wide margin.
EPC Rating
66 (D)
Street avg 65 (D)
Floor Area
72 m²
Street avg 105 m²
CO₂ Emissions
2.8 t/year
Street avg 4.2 t/year
Habitable Rooms
3 rooms
Street avg 4 rooms
Similar properties nearby
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1 Cranley Mews, Kensington And Chelsea
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10 Cranley Mews, 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
0.1 km
Onslow Square — bus stop.
Closest school
0.3 km
Oratory Roman Catholic Primary School. 58 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
58.4dB
Night-time· 23:00 – 07:00
48.1dB