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Get startedBasil Mansions, Flat 11, Basil Street, Kensington And Chelsea, London, SW3 1AP
2 planning records
About Basil Mansions
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Basil Mansions is an end-of-terrace house in Kensington And Chelsea, London, London (SW3 1AP). It has a recorded floor area of 182 m² (around 1959 sq ft), construction records dating it to before 1900 and council tax band H. The latest certificate (September 2020) shows a D (score 55), a step below the typical UK home. When first surveyed in December 2009 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Good and lighting went from Very Poor to Poor. At 182 m² this is the 11th 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.
Sale prices here have outpaced London HPI: 5.6% per year against 0% for the wider region. Today's modelled estimate of £3,373,000 is 16.3% above the 2024 sale price. On a £-per-square-foot basis, the last sale (£1,480/sq ft) was about 69.5% above the typical sold price in the postcode. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include new windows, meaningful when judging how the property has evolved. Most recent transfer: January 2024 at £2,900,000.
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 3)
Sept 2020
EPC Rating
A
B
C
D
D55
E
F
G
Main Heating
—
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
8.7 t/year
Occupancy
Owner Occupied
Planning history
Applications and permits filed against Basil Mansions, Flat 11, Basil Street, Kensington And Chelsea, London, SW3 1AP, sourced from the PlanIt planning register.
- Nov 2025RenovationFullGrant Planning Permission/Consent
Removal of external window and replacement with air vent to facilitate installation of internal air conditioning unit
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Basil Mansions has more than tripled in price since its earliest registered sale in 2000.
Current estimate
See how we calculated this£3,373,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.6% per year over 24 years.
Last sold (2024)
£2,900,000
Growth on file: 5.6% per year over 24 years.
Sales timeline
Full property reportLaunch offer · 33% off
The complete analysis of Basil Mansions, Flat 11, 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.
Years Held for Basil Mansions lags the street by a wide margin.
Price per m²
£15,934
Street avg £14,478
Floor Area
182 m²
Street avg 148 m²
Habitable Rooms
4 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 11, Basil Street, Kensington And Chelsea, London, SW3 1AP. Each answer is also embedded as structured data for search engines.