Are you a property professional?Get qualified leads from motivated homeowners.
Get startedJefferson House, Flat 3, 11 Basil Street, Kensington And Chelsea, London, SW3 1AX
About Jefferson House
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Jefferson House is a property in Kensington And Chelsea, London, London (SW3 1AX). It has a recorded floor area of 50 m² (around 538 sq ft) and construction records dating it to before 1900. At 50 m² this is the 28th 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 (February 2026) shows a C (score 69), just inside the C band. This certificate was lodged in the last six months, so the rating reflects current condition.
At 50 m² the property is well over the postcode median (27 m² across 32 EPCs), placing it in the larger end of the local stock.
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
The EPC has just been inspected, so the rating reflects current condition.
EPC Rating
A
B
C
C69
D
E
F
G
Main Heating
—
Main Fuel
Gas
Hot Water
Good
Windows
Very Poor
CO2 Emissions
1.9 t/year
Occupancy
Owner Occupied
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Jefferson House has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
Current estimate
See how we calculated this£494,000
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.
Full property reportLaunch offer · 33% off
The complete analysis of Jefferson House, Flat 3, 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.
Floor Area for Jefferson House runs comfortably ahead of the street norm.
EPC Rating
69 (C)
Street avg 69 (C)
Floor Area
50 m²
Street avg 41 m²
CO₂ Emissions
1.9 t/year
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 3, 11 Basil Street, Kensington And Chelsea, London, SW3 1AX. Each answer is also embedded as structured data for search engines.