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Get startedJefferson House, Flat 8, 11 Basil Street, Kensington And Chelsea, London, SW3 1AX
3 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 25 m² (around 269 sq ft) and construction records dating it to 1900-1929. At 25 m² this is the 10th 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 2024) shows a C (score 74). When first surveyed in June 2023 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Good to Very Good.
Sale prices here have outpaced London HPI: 5.4% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£1,672/sq ft) was about 97.5% above the typical sold price in the postcode. A recent sale: £450,000 in June 2025.
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 2024
EPC Rating
A
B
C
C74
D
E
F
G
Main Heating
—
Main Fuel
Gas
Hot Water
Good
Windows
Very Poor
CO2 Emissions
1.0 t/year
Occupancy
Rented
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Jefferson House has more than quadrupled in price since its earliest registered sale in 1998.
Current estimate
See how we calculated this£486,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.4% per year over 27 years.
Last sold (2025)
£450,000
Growth on file: 5.4% per year over 27 years.
Sales timeline
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The complete analysis of Jefferson House, Flat 8, 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.
Jefferson House is notably below the street on years held.
Price per m²
£18,000
Street avg £14,470
Floor Area
25 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 8, 11 Basil Street, Kensington And Chelsea, London, SW3 1AX. Each answer is also embedded as structured data for search engines.