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Get started17b, William Mews, Westminster, London, SW1X 9HF
Extendable
About 17b
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
17b is a three-bedroom end-of-terrace house in Westminster, London, London (SW1X 9HF). It has a recorded floor area of 173 m² (around 1862 sq ft), construction records dating it to before 1900 and council tax band H. The latest certificate (May 2012) shows a D (score 63), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since March 2012. The recommended improvements would push it to C (score 80). The latest certificate is from May 2012, so improvements made since then won't be reflected. Other recorded features include a balcony. Our model identifies extension potential, subject to local planning policy.
Sale prices here have outpaced London HPI: 6.6% per year against 0% for the wider region. Today's modelled estimate of £3,569,000 is 37.3% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£1,396/sq ft) was about 101% above the typical sold price in the postcode. At 173 m² the property is well over the postcode median (104 m² across 16 EPCs), placing it in the larger end of the local stock. 3 bedrooms is on the larger side for this postcode, where 2 is the typical count. Most recent transfer: March 2020 at £2,600,000.
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
- Bedrooms3
- Bathrooms2
- Open-plan layoutYes
- Dining roomYes
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
17b's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 03 May 2022
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
17b has more than tripled in price since its earliest registered sale in 1999.
Current estimate
See how we calculated this£3,569,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.6% per year over 21 years.
Last sold (2020)
£2,600,000
Growth on file: 6.6% per year over 21 years.
Sales timeline
Launch offer · 33% off
The complete analysis of 17b, 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.
Floor Area for 17b runs comfortably ahead of the street norm.
Price per m²
£15,029
Street avg £13,940
Floor Area
173 m²
Street avg 105 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 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 17b, William Mews, Westminster, London, SW1X 9HF. Each answer is also embedded as structured data for search engines.
