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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 33 m² (around 355 sq ft), construction records dating it to before 1900 and council tax band F. At 33 m² this is the 2nd smallest of 9 units on EPC record in the building, where floor areas span 26–52 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (January 2026) shows a C (score 73). When first surveyed in January 2016 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor; while lighting dropped from Very Good to Good. This certificate was lodged in the last six months, so the rating reflects current condition.
Untraded for 26 years, with the last transfer in October 2000. Across the public record there are 4 sales, relatively high churn for a single property. Sale prices here have outpaced London HPI: 16.6% per year against 0% for the wider region. Today's modelled estimate of £563,000 sits 168.1% above the 2000 sale of £210,000. On a £-per-square-foot basis, the last sale (£591/sq ft) was about 55.5% below the postcode norm. At 33 m² it sits well below the postcode median (51 m² across 15 EPCs), making it one of the more compact homes locally.
Flat 1a's carbon output is low for the local stock.
Flat 1a's modelled value sits at over four times its earliest registered sale price (1997).
£563,000
Modelled from EPC, postcode comparables and a sale-price growth of 16.6% per year over 3 years.
£210,000
Growth on file: 16.6% per year over 3 years.
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On epc rating, Flat 1a stands well clear of the street.
Price per m²
£6,364
Street avg £18,515
Floor Area
33 m²
Street avg 98 m²
Habitable Rooms
1 rooms
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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Changes detected from historical EPC data
Wall insulation improved
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27 October 2000Most recent
£210,000
+31.3%over 1 year7 June 1999
£160,000
+9.6%over 1 year20 October 1997
£146,000
+18.7%7 May 1997
£123,000
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

Street avg 4 rooms
CO₂ Emissions
1.2 t/year
Street avg 4.9 t/year
SW1X 9RX
Closest school
0.1 km
Holy Trinity CofE Primary School. 54 schools nearby.
Night-time· 23:00 – 07:00
48.5dB