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Get startedFlat 1a is a mid-terrace house in Kensington And Chelsea, London, London (SW1X 9AE). It has a recorded floor area of 137 m² (around 1475 sq ft), construction records dating it to before 1900 and council tax band G. At 137 m² this is the 4th smallest of 6 units on EPC record in the building, where floor areas span 37–270 m². The building's EPC ratings span E to C across 6 units on file. The latest certificate (August 2021) shows a D (score 61), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 75).
At 137 m² the property is well over the postcode median (51 m² across 15 EPCs), placing it in the larger end of the local stock. 8 planning records sit against the property, 6 approved, 2 refused. The record references listed-building consent, which constrain future alterations.
A recent planning application at Flat 1a was refused — worth checking the council file.
Addition of metal gate to existing metal railings at external entrance to Flat B
Flat 1a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£2,334,000
Modelled from EPC, postcode comparables.
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.
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
An AI-written breakdown of everything that matters
Flat 1a outperforms the street on floor area by a wide margin.
EPC Rating
61 (D)
Street avg 62 (D)
Floor Area
137 m²
Street avg 91 m²
CO₂ Emissions
5.4 t/year
Street avg 4.6 t/year
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Sloane Street / Sloane Square Station — bus stop.

Daytime· 07:00 – 23:00
58.2dB

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Addition of metal gate to existing metal railings at external entrance to Flat B
6 more applications for this property
See the full planning history in the property report.
Median price across the last 5 sales in SW1X 9AE: £1,205,999 (2025–2022).
Flat 4 7 Wilbraham Place Kensington And Chelsea London
Sold Jul 2025
Flat 5 7 Wilbraham Place Kensington And Chelsea London
Sold May 2024
Flat 2 9 Wilbraham Place Kensington And Chelsea London
Sold Nov 2023
Flat 10 7 Wilbraham Place Kensington And Chelsea London
Sold May 2022
Flat 7 7 Wilbraham Place Kensington And Chelsea London
Sold Apr 2020
Detailed EPC data
Full energy ratings, history and recommendations
Full planning history
Every application and decision on record
Plus much more
Comparable sales, transport, crime, schools and more

Habitable Rooms
5 rooms
Street avg 3 rooms
SW1X 9RX
Closest school
0.1 km
Holy Trinity CofE Primary School. 54 schools nearby.
Night-time· 23:00 – 07:00
48.5dB