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Get started17 William Mews, Westminster, London, SW1X 9HF
2 planning records
About 17 William Mews
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
17 William Mews is a mid-terrace house in Westminster, London, London (SW1X 9HF). It has a recorded floor area of 146 m² (around 1572 sq ft), construction records dating it to before 1900 and council tax band H. The latest certificate (February 2021) shows a D (score 60), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 82), a 2-band jump.
At 146 m² the property is well over the postcode median (104 m² across 16 EPCs), placing it in the larger end of the local stock. 2 planning records sit against the property, 0 approved, 0 refused, 2 pending. An application is currently awaiting a decision. Today's modelled estimate of £3,221,000 is 27.3% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£1,610/sq ft) was about 131.7% above the typical sold price in the postcode. Last sale on file: £2,530,000 in May 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.
17 William Mews's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
A
B
C
D
D60
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Very Poor
CO2 Emissions
7.2 t/year
Occupancy
Owner Occupied
Planning history
Applications and permits filed against 17 William Mews, Westminster, London, SW1X 9HF, sourced from the PlanIt planning register.
There is a planning application currently awaiting a decision.
- Apr 2026ConditionsPending
Details of all flood resilient and resistant measures (including finished floor levels) pursuant to condition 4 of planning permission dated 17th June 2025 (RN: 24/07507/FULL).
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
Current estimate
See how we calculated this£3,221,000
Modelled from EPC, postcode comparables.
Last sold (2021)
£2,530,000
Recorded with HM Land Registry.
Sales timeline
Launch offer · 33% off
The complete analysis of 17 William Mews, Westminster, London, SW1X 9HF
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 William Mews homes
Four headline reads against 14 similar houses on this street, drawn from the latest EPC and Land Registry data.
17 William Mews is notably below the street on co₂ emissions.
Price per m²
£17,329
Street avg £13,710
Floor Area
146 m²
Street avg 107 m²
Habitable Rooms
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
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 9HF 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 17 William Mews, Westminster, London, SW1X 9HF. Each answer is also embedded as structured data for search engines.
