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Get startedJefferson House, Flat 7, 11 Basil Street, Kensington And Chelsea, London, SW3 1AX
6 sales on record
About Jefferson House
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Jefferson House is a mid-terrace house in Kensington And Chelsea, London, London (SW3 1AX). It has a recorded floor area of 31 m² (around 334 sq ft) and construction records dating it to before 1900. At 31 m² this is the 22nd smallest of 32 units on EPC record in Jefferson House, where floor areas span 12–229 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (April 2019) shows a C (score 73). When first surveyed in November 2008 the rating was D, the property has climbed 1 band since. Between certificates, window efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good.
Sale prices here have outpaced London HPI: 10.2% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£1,738/sq ft) was about 106.1% above the typical sold price in the postcode. One planning record on file: new windows approved in 2014. Past consents include new windows, meaningful when judging how the property has evolved. Most recent transfer: September 2022 at £580,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Jefferson House's carbon output is low for the local stock.
Current Certificate(1 of 2)
Apr 2019
EPC Rating
A
B
C
C73
D
E
F
G
Main Heating
—
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
1.3 t/year
Occupancy
Owner Occupied
Planning history
Applications and permits filed against Jefferson House, Flat 7, 11 Basil Street, Kensington And Chelsea, London, SW3 1AX, sourced from the PlanIt planning register.
- Mar 2014RenovationFullGrant Planning Permission/Consent
Remove and replace windows with double glazed and timber framed. Windows include weather seals and argon filled double glazed units.
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Price for Jefferson House has grown more than fourfold since the 1995 starting point.
Current estimate
See how we calculated this£591,000
Modelled from EPC, postcode comparables and a sale-price growth of 10.2% per year over 28 years.
Last sold (2022)
£580,000
Growth on file: 10.2% per year over 28 years.
Sales timeline
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The complete analysis of Jefferson House, Flat 7, 11 Basil Street, Kensington And Chelsea, London, SW3 1AX
Everything we know about this property, compiled into one in-depth, downloadable report.
Versus other Basil Street homes
Four headline reads against 32 similar flats on this street, drawn from the latest EPC and Land Registry data.
On years held, Jefferson House runs well behind the street norm.
Price per m²
£18,710
Street avg £14,442
Floor Area
31 m²
Street avg 42 m²
Habitable Rooms
1 rooms
Street avg 1 rooms
Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the London district page.
Rail-style transport is unusually close for this postcode.
Crime
9/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Knightsbridge Station — tram stop.
Road noise across the postcode
Modelled day and night-time noise levels around SW3 1AX from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
58.3dB
Everything within walking distance
Schools, transport stops and scenic spots near this property — 81 points of interest in total.
Common questions
The questions buyers, sellers and homeowners most often ask about Jefferson House, Flat 7, 11 Basil Street, Kensington And Chelsea, London, SW3 1AX. Each answer is also embedded as structured data for search engines.