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Get startedThorburn House is a two-bedroom detached house in Westminster, London, London (SW1X 8EX). It has a recorded floor area of 85 m² (around 915 sq ft), construction records dating it to 1950-1966 and council tax band G. At 85 m² this is the 4th smallest of 20 units on EPC record in Thorburn House, where floor areas span 82–193 m². The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (62 versus a best of 79). The latest certificate (May 2022) shows a D (score 62), on the cusp of jumping into the C band. Earlier certificates rated it C (June 2009); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Poor. The recommended improvements would push it to C (score 75).
It hasn't traded since September 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £1,095,000 sits 76.6% above the 2009 sale of £620,000. On a £-per-square-foot basis, the last sale (£678/sq ft) was about 24.4% below the postcode norm. At 85 m² it's 18.3% smaller than the typical home in the postcode (104 m² median across 19 EPCs).
The latest sale fell during the post-2008 dip, often a low-water mark in price comparisons.
£1,095,000
Modelled from EPC, postcode comparables.
£620,000
Recorded with HM Land Registry.
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On epc rating, Thorburn House runs well behind the street norm.
Price per m²
£7,294
Street avg £15,474
Floor Area
85 m²
Street avg 106 m²
Habitable Rooms
3 rooms
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Sloane Street / Knightsbridge Station — bus stop.

Daytime· 07:00 – 23:00
59.9dB

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Changes detected from historical EPC data
Changed to a more efficient fuel source
More low energy lighting installed
Heating controls changed
Low energy lighting percentage decreased
Are we missing something? Tell us about home improvements to help adjust your valuation.
1 September 2009Most recent
£620,000
Median price across the last 5 sales in SW1X 8EX: £1,360,000 (2024–2019).
Thorburn House Flat 11 Kinnerton Street Westminster London
Sold Dec 2024
Thorburn House Flat 1 Kinnerton Street Westminster London
Sold Jan 2022
Thorburn House Flat 12a Kinnerton Street Westminster London
Sold Oct 2019
Thorburn House Flat 19 Kinnerton Street Westminster London
Sold Apr 2019
Thorburn House Flat 9 Kinnerton Street Westminster London
Sold Jun 2018
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 3 rooms
CO₂ Emissions
3.6 t/year
Street avg 3.5 t/year
SW1X 8LB
Closest school
0.8 km
Holy Trinity CofE Primary School. 48 schools nearby.
Night-time· 23:00 – 07:00
51.5dB