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Get started11 Lowndes Square, Westminster, London, SW1X 9HB
10 planning records
About 11 Lowndes Square
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
11 Lowndes Square is a detached house in Westminster, London, London (SW1X 9HB). It has a recorded floor area of 241 m² (around 2594 sq ft), construction records dating it to before 1900 and council tax band F. At 241 m² this is the 2nd smallest of 4 units on EPC record in the building, where floor areas span 154–264 m². The building's EPC ratings span D to C, with this unit at the top. On EPC score it ranks first in the building (69 versus a worst of 55). The latest certificate (April 2025) shows a C (score 69), just inside the C band. When first surveyed in February 2009 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Average to Very Good; while wall efficiency dropped from Good to Very Poor and window efficiency dropped from Good to Average.
At 241 m² the property is well over the postcode median (128 m² across 19 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £3,806,000 sits 217.8% above the 2021 sale of £1,197,500. On a £-per-square-foot basis, the last sale (£462/sq ft) was about 22.9% below the postcode norm. 10 planning records sit against the property, 9 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. The record references listed-building consent, which constrain future alterations. Last sale on file: £1,197,500 in June 2021. 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.
11 Lowndes Square's carbon output runs well above what efficient homes in the postcode produce.
Current Certificate(1 of 4)
Apr 2025
EPC Rating
A
B
C
C69
D
E
F
G
Main Heating
Electric & Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
8.5 t/year
Occupancy
Owner Occupied
Planning history
Applications and permits filed against 11 Lowndes Square, Westminster, London, SW1X 9HB, sourced from the PlanIt planning register.
11 Lowndes Square has 2 separate extension applications on the council record.
- Mar 2012RenovationHeritageGranted
Installation of three air conditioning units at roof level (In association with Flat 3).
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
11 Lowndes Square's estimated value is more than triple its earliest registered sale price (2021).
Current estimate
See how we calculated this£3,806,000
Modelled from EPC, postcode comparables.
Last sold (2021)
£1,197,500
Recorded with HM Land Registry.
Sales timeline
Launch offer · 33% off
The complete analysis of 11 Lowndes Square, Westminster, London, SW1X 9HB
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
An AI-written breakdown of everything that matters
Versus other Lowndes Square homes
Four headline reads against 19 similar flats on this street, drawn from the latest EPC and Land Registry data.
On years held, 11 Lowndes Square runs well behind the street norm.
Price per m²
£4,969
Street avg £14,617
Floor Area
241 m²
Street avg 157 m²
Habitable Rooms
6 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
5/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 SW1X 9HB from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
59.7dB
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 11 Lowndes Square, Westminster, London, SW1X 9HB. Each answer is also embedded as structured data for search engines.
