William Street, London
House prices, sold prices and local information for SW1X 9HL.
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At a glance
6 property sales on William Street, London have been recorded by HM Land Registry since 2023. In the last 12 months 3 homes sold here for an average of £14,139,604. Most sales here are flat homes, which have sold for an average of £10,469,802. That is 1771% above the London average of £755,818 over the same period. 1 home here has sold more than once since 2023; 0 of them sold for more the second time. Recorded sale prices on William Street range from £1,500,000 to £23,250,000. 14% of homes sold here were freehold and 86% leasehold.
House prices on William Street compared
Average sale price over the last 12 months. See all SW1X house prices.
Average sale price by year
Tenure: 14% freehold and 86% leasehold across 7 recorded sales. Lease extension calculator.
Prices by property type
| Type | Sales | Average price | Last sold |
|---|---|---|---|
| Flat | 6 | £10,469,802 | 15 Apr 2026 |
Sold prices on William Street
| Address | Date | Price | Type | Tenure |
|---|---|---|---|---|
| Apartment 5, 1, William Street SW1X 9HL | 15 Apr 2026 | £17,668,812 | Flat | Leasehold |
| Apartment 9, 1, William Street SW1X 9HL | 20 Jan 2026 | £1,500,000 | Flat | Leasehold |
| Apartment 6, 1, William Street SW1X 9HL | 21 Nov 2025 | £23,250,000 | Flat | Leasehold |
| Apartment 9, 1, William Street SW1X 9HL | 30 Sep 2025 | £2,550,000 | Flat | Leasehold |
| Apartment 7, 1, William Street SW1X 9HL | 12 Mar 2024 | £2,650,000 | Flat | Leasehold |
| Apartment 4, 1, William Street SW1X 9HL | 29 Sep 2023 | £15,200,000 | Flat | Leasehold |
| 8, William Street House, 8 - 12, William Street | 13 Apr 2017 | £33,000,000 | Other | Freehold |
Sale prices are as recorded by HM Land Registry. Some sales (for example repossessions and company purchases) are listed but left out of the averages.
Sale history: homes sold more than once
| Address | Sales | Change |
|---|---|---|
| Apartment 9, 1, William Street | £2,550,000 (Sep 2025) → £1,500,000 (Jan 2026) | -41% over under a year |
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Schools near William Street
| School | Type | Ages | Ofsted | Distance |
|---|---|---|---|---|
| More House School 79 pupils | Other independent school Roman Catholic | 9–18 | Report | 0.3 mi |
| Hill House School 396 pupils | Other independent school | 4–13 | Report | 0.3 mi |
| Caelum House School 17 pupils | Other independent special school | 4–11 | Report | 0.4 mi |
| Knightsbridge School 295 pupils | Other independent school | 2–16 | Report | 0.4 mi |
| Sussex House School 184 pupils | Other independent school Church of England | 8–13 | Report | 0.5 mi |
| London Park School Mayfair and London Park School Sixth 202 pupils | Other independent school | 11–18 | Report | 0.5 mi |
| Eaton House School 114 pupils | Other independent school | 2–8 | Report | 0.6 mi |
| St George's Hanover Square CofE Primary School 73 pupils | Primary Church of England | 3–11 | Good Report | 0.6 mi |
Source: Department for Education (Get Information about Schools) and Ofsted. Grades are from each school's last graded inspection; newer inspections use report cards without a single overall grade, so check the full report. Distances are straight-line. Check catchment areas with the local council.
Getting around, shops and health
Train, tram & metro stations
- London Victoria station 0.8 mi · 15 min walk
- London Victoria station 0.8 mi · 15 min walk
- London Paddington station 1.2 mi · 25 min walk
- Knightsbridge Underground Station 0.1 mi · 2 min walk
- Hyde Park Corner Underground Station 0.3 mi · 5 min walk
Nearest bus stops
- Knightsbridge Station (Stop KJ, SLOANE STREET) 2 min walk
- Sloane Street / Knightsbridge Station (Stop KK, SLOANE STREET) 3 min walk
- Knightsbridge Station / Harrods (Stop KE, KNIGHTSBRIDGE) 3 min walk
- Hyde Park Corner (W-bound) 4 min walk
GP surgeries
- Knightsbridge Medical Centre
71-75 Pavilion Road, London · 0.3 mi - Belgravia Surgery
24 Eccleston Street, Belgravia, London · 0.6 mi - Imperial College Health Centre
40 Princes Gardens, London · 0.6 mi - Belgrave Medical Centre
The Surgery, 13 Pimlico Road, London · 0.8 mi
Supermarkets
- Waitrose Waitrose Belgravia · 0.2 mi
- Sainsburys Local Sainsburys Brompton Road Local · 0.4 mi
- Little Waitrose Little Waitrose Knightsbridge · 0.4 mi
- Spar Spar - Essentials Store - Imperial College · 0.6 mi
Pharmacies
- A Moore & Co · 0.2 mi
- Day Lewis Pharmacy · 0.3 mi
- Boots · 0.4 mi
Dentists
- Knightsbridge Orthodontics · 0.5 mi
- Elizabeth Street Dentist · 0.6 mi
- Happy Kids Dental Practice Limited · 0.6 mi
Sources: Department for Transport (NaPTAN), NHS England organisation data, and GEOLYTIX Retail Points (open data). Walking times are estimates from straight-line distance.
Area profile
Deprivation
This neighbourhood is in decile 8 of 10 on the English Indices of Deprivation 2025, where 1 is the most deprived 10% of areas in England and 10 the least deprived.
| Income | 10 of 10 |
| Employment | 10 of 10 |
| Education and skills | 8 of 10 |
| Health and disability | 10 of 10 |
| Crime | 6 of 10 |
| Access to housing and services | 9 of 10 |
| Living environment | 1 of 10 |
Each domain ranked in deciles across England (10 = least deprived).
Homes
| Here | Eng & Wales | |
|---|---|---|
| Owned | 43.1% | 62.5% |
| Private rented | 54.4% | 20.3% |
| Social rented | 2.3% | 17.1% |
| Households | 476 |
People
| Here | Eng & Wales | |
|---|---|---|
| Under 15 | 11.2% | 17.4% |
| Aged 15–64 | 71.5% | 64.1% |
| Aged 65+ | 17.3% | 18.6% |
| Residents | 1,153 |
Broadband
| Here | UK | |
|---|---|---|
| Superfast (30Mbit+) | 100% | 95% |
| Ultrafast (300Mbit+) | 100% | 80% |
| Gigabit-capable | 100% | 80% |
Share of homes on this street's postcodes that can get each speed. UK figure is the average across all postcodes. Source: Ofcom Connected Nations.
Mobile signal
| Here | Eng & Wales | |
|---|---|---|
| 4G indoors, all 4 networks | 100% | 89% |
| 4G indoors, at least 1 network | 100% | 100% |
| 4G outdoors, all 4 networks | 100% | 99% |
| Calls indoors, all 4 networks | 100% | 92% |
Share of homes across Westminster with good coverage (Jul 2025). Signal varies street by street; check your exact address on Ofcom's checker. Source: Ofcom Connected Nations.
Neighbourhood figures cover the surrounding Lower Layer Super Output Area (about 1,500 residents). Sources: Census 2021 (ONS) and the English Indices of Deprivation 2025.
Energy ratings and home sizes on William Street
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Who lives around William Street
Ethnic group
| Here | Westminster | |
|---|---|---|
| White | 70.3% | 55.2% |
| Asian, Asian British or Asian Welsh | 12.3% | 16.8% |
| Other ethnic group | 11.1% | 13.5% |
| Mixed or Multiple ethnic groups | 5.1% | 6.5% |
| Black, Black British, Black Welsh, Caribbean or African | 1% | 8.1% |
Religion
| Here | Westminster | |
|---|---|---|
| Christian | 51.1% | 37.3% |
| No religion | 22.5% | 25.9% |
| Not answered | 8.2% | 9.4% |
| Muslim | 7.6% | 20% |
| Jewish | 3.4% | 2.8% |
| Other religion | 3.1% | 0.9% |
| Hindu | 2.8% | 2.2% |
| Sikh | 0.7% | – |
Country of birth
| Here | Westminster | |
|---|---|---|
| Born in the UK | 37.4% | 44.4% |
| Born outside the UK | 62.6% | 55.6% |
Highest qualification
| Here | Westminster | |
|---|---|---|
| Level 4 qualifications and above | 60.5% | 57.7% |
| No qualifications | 10.2% | 12.9% |
| Level 3 qualifications | 9.6% | 12.4% |
| Other qualifications | 9.6% | 3.2% |
| Level 2 qualifications | 6.5% | 6.9% |
| Level 1 and entry level qualifications | 2.6% | 4.9% |
| Apprenticeship | 1% | 2.1% |
General health
| Here | Westminster | |
|---|---|---|
| Very good health | 67.4% | 56.3% |
| Good health | 26.1% | 28.9% |
| Fair health | 5% | 9.7% |
| Bad health | 1.2% | 3.6% |
| Very bad health | 0.3% | 1.5% |
Cars or vans per household
| Here | Westminster | |
|---|---|---|
| No cars or vans in household | 48% | 66.2% |
| 1 car or van in household | 34.6% | 27.8% |
| 2 cars or vans in household | 10.7% | 4.9% |
| 3 or more cars or vans in household | 6.7% | 1.1% |
Source: Census 2021 (ONS), via Nomis. Percentages of usual residents or households, as recorded in March 2021.
Figures cover the surrounding neighbourhood (Lower Layer Super Output Area, about 1,500 residents). Full demographics of Westminster.
Planning and heritage near William Street
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Noise, radon and ground hazards
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Planning applications near William Street
Recent planning applications around William Street from the council's planning register. Choose how far to look:
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Council tax here
Westminster Band D is £1,050 a year (Band A £700). See every band.
Estate agents near William Street
- Douglas Lyons & Lyons 0.1 mi
- Marler & Marler 0.1 mi
- Henry & James 0.2 mi
- Chestertons 0.3 mi
- Harrods Estates 0.3 mi
Agent locations © OpenStreetMap contributors. More local agents
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Nearby streets in SW1X
- Cadogan Square£4.6m
- Eaton Place£6.13m
- Lennox Gardens£1.83m
- Pont Street£1.08m
- Sloane Street£1.1m
- Cadogan Place£3.41m
- Kinnerton Street£2.02m
- Hans Place£5.44m
- Cadogan Lane£3.47m
- Hans Crescent£2m
- Chesham Street£2.03m
- Lowndes Square£10m