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Get startedBasil Mansions, Flat 1, Basil Street, Kensington And Chelsea, London, SW3 1AP
About Basil Mansions
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Basil Mansions is a four-bedroom end-of-terrace house in Kensington And Chelsea, London, London (SW3 1AP). It has a recorded floor area of 190 m² (around 2045 sq ft), construction records dating it to 1900-1929 and council tax band F. The latest certificate (July 2025) shows a D (score 55), a step below the typical UK home. Earlier certificates rated it C (October 2014); the latest reading is one band lower. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Poor to Good; while window efficiency dropped from Good to Poor and hot-water efficiency dropped from Good to Average. At 190 m² this is the 13th smallest of 22 units on EPC record in Basil Mansions, where floor areas span 20–245 m². The building's EPC ratings span F to B across 22 units on file. Period features are noted in the property record.
Untraded for 25 years, with the last transfer in August 2001. Today's modelled estimate of £3,698,000 sits 236.2% above the 2001 sale of £1,100,000. On a £-per-square-foot basis, the last sale (£538/sq ft) was about 38.6% below the postcode norm.
What this property has
Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.
Inside
- Bedrooms4
- Bathrooms3
- EnsuiteYes
Building
- Concierge
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Basil Mansions's carbon output runs well above what efficient homes in the postcode produce.
Current Certificate(1 of 2)
Jul 2025
EPC Rating
A
B
C
D
D55
E
F
G
Main Heating
—
Main Fuel
Gas
Hot Water
Average
Windows
Poor
CO2 Emissions
7.5 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.
Basil Mansions's estimated value is more than triple its earliest registered sale price (2001).
Current estimate
See how we calculated this£3,698,000
Modelled from EPC, postcode comparables.
Last sold (2001)
£1,100,000
Recorded with HM Land Registry.
Sales timeline
Full property reportLaunch offer · 33% off
The complete analysis of Basil Mansions, Flat 1, Basil Street, Kensington And Chelsea, London, SW3 1AP
Everything we know about this property, compiled into one in-depth, downloadable report.
Versus other Basil Street homes
Four headline reads against 21 similar flats on this street, drawn from the latest EPC and Land Registry data.
Basil Mansions is notably below the street on epc rating.
Price per m²
£5,789
Street avg £15,075
Floor Area
190 m²
Street avg 147 m²
Habitable Rooms
5 rooms
Street avg 4 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
Sloane Street / Knightsbridge Station — bus stop.
Road noise across the postcode
Modelled day and night-time noise levels around SW3 1AP from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
58.2dB
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 Basil Mansions, Flat 1, Basil Street, Kensington And Chelsea, London, SW3 1AP. Each answer is also embedded as structured data for search engines.