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Get startedWashington House, Flat 4, Basil Street, Kensington And Chelsea, London, SW3 1AR
EPC B
About Washington House
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Washington House is a mid-terrace house in Kensington And Chelsea, London, London (SW3 1AR). It has a recorded floor area of 186 m² (around 2002 sq ft), construction records dating it to before 1900 and council tax band H. The latest certificate (June 2017) returns a B (score 82), comfortably above the UK average. When first surveyed in June 2009 the rating was E, the property has climbed 3 bands since. Between certificates, wall efficiency went from Very Poor to Good, window efficiency went from Very Poor to Average and hot-water efficiency went from Poor to Good. At 186 m² this is the 6th smallest of 8 units on EPC record in Washington House, where floor areas span 145–215 m². The building's EPC ratings span E to B, with this unit at the top. On EPC score it ranks first in the building (82 versus a worst of 39).
Sale prices here have outpaced London HPI: 7.3% per year against 0% for the wider region. Today's modelled estimate of £3,182,000 is 14% below the 2022 sale of £3,700,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£1,848/sq ft) was about 274.4% above the typical sold price in the postcode. At 186 m² it's 16.3% larger than the typical home in the postcode (160 m² median across 7 EPCs). On energy efficiency it sits in the top 10% of properties in this postcode. Last sale on file: £3,700,000 in October 2022. 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.
Washington House ranks among the most efficient homes in the postcode for energy use.
Current Certificate(1 of 3)
Jun 2017
EPC Rating
A
B
B82
C
D
E
F
G
Main Heating
Electric & Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
2.8 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.
Price for Washington House has grown more than fourfold since the 1998 starting point.
Current estimate
See how we calculated this£3,182,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.3% per year over 24 years.
Last sold (2022)
£3,700,000
Growth on file: 7.3% per year over 24 years.
Sales timeline
Full property reportLaunch offer · 33% off
The complete analysis of Washington House, Flat 4, Basil Street, Kensington And Chelsea, London, SW3 1AR
Everything we know about this property, compiled into one in-depth, downloadable report.
Versus other Basil Street homes
Four headline reads against 7 similar flats on this street, drawn from the latest EPC and Land Registry data.
On epc rating, Washington House stands well clear of the street.
Price per m²
£19,892
Street avg £14,163
Floor Area
186 m²
Street avg 170 m²
Habitable Rooms
4 rooms
Street avg 5 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 / Harrods — bus stop.
Road noise across the postcode
Modelled day and night-time noise levels around SW3 1AR from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
58.0dB
Everything within walking distance
Schools, transport stops and scenic spots near this property — 79 points of interest in total.
Common questions
The questions buyers, sellers and homeowners most often ask about Washington House, Flat 4, Basil Street, Kensington And Chelsea, London, SW3 1AR. Each answer is also embedded as structured data for search engines.