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Bricks&Logic is a trading name of Urban Markets Ltd
Company No. 11113204
  | Â
VAT No. GB 287 0845 68
Registered Address: 2 Leman St, London E1 8FA
SW1X 9HLHouse Prices / London, Westminster, William Street
Last updated May 2026
Key Postcode Insights
SW1X 9HL is a residential postcode situated on William Street, London, SW1 with 12 addresses.
It ranks as the 833rd largest and 1465th most expensive of the 1,807 postcodes in the SW1X area. The dominant property type is a modern flat built after 1980.
The postcode contains a total of 12 properties: 12 flats.
12
Properties
- Flats
Key Postcode Insights
SW1X 9HL is a residential postcode situated on William Street, London, SW1 with 12 addresses.
It ranks as the 833rd largest and 1465th most expensive of the 1,807 postcodes in the SW1X area. The dominant property type is a modern flat built after 1980.
The postcode contains a total of 12 properties: 12 flats.
12
Properties
- Flats
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House Pricesin SW1X 9HL
Sale prices range from £1,363,973 for 3 bedroom leasehold flats with a garden (1,291 ft2) to £13,737,495 for 3 bedroom leasehold flats (5,037 ft2) .
Monthly rental prices range from £5,642 pcm for 3 bed flats to £38,998 pcm for 3 bed flats.
The gross rental yield is between 3.4% and 5.0%.
The average value per square foot is £2,753.
Average Sale Value
£5,906,695
Average Rental Value
£17,448 pcm
Average Rental Yield
3.5% /year
Average Value Per Sqft
£2,753 /ft2
Sales Market Trendsin SW1X 9HL
The last sale in SW1X 9HL sold for £2,550,000 on 30th September 2025. Since then prices are up an average of 1.5%.
The current average value in the postcode is £5,906,695.
The SW1X 9HL Sales Market has decreased by 14.1% over the last 10 years.
| Period | Year on Year | Average Price |
|---|---|---|
| April 2026 | -0.3% | £5,906,695 |
| April 2025 | -3.8% | £5,921,555 |
| April 2024 | -0.6% | £6,153,219 |
| April 2023 | 0% | £6,189,067 |
| April 2022 | 2.7% | £6,188,780 |
| April 2021 | -5.4% | £6,026,440 |
| April 2020 | 4.2% | £6,368,041 |
| April 2019 | -5.1% | £6,112,047 |
| April 2018 | -2.7% | £6,441,979 |
| April 2017 | -3.7% | £6,623,687 |
| April 2016 | -1.6% | £6,879,782 |
| April 2015 | 0% | £6,993,553 |
| April 2014 | 14.3% | £6,994,144 |
| April 2013 | 11.8% | £6,116,837 |
| April 2012 | 16.8% | £5,471,359 |
| April 2011 | 9.7% | £4,685,018 |
| April 2010 | 11.5% | £4,272,698 |
| April 2009 | -7.7% | £3,831,379 |
| April 2008 | 22.5% | £4,152,940 |
| April 2007 | 0% | £3,389,498 |
Rental Market Trendsin SW1X 9HL
The current average rental value in the postcode is £17,448.
The SW1X 9HL Rental Market has increased by 39.9% over the last 10 years.
| Period | Year on Year | Average Price |
|---|---|---|
| April 2026 | 9.3% | £17,448pcm |
| April 2025 | 3% | £15,957pcm |
| April 2024 | 1.2% | £15,487pcm |
| April 2023 | 14.2% | £15,300pcm |
| April 2022 | 23.3% | £13,397pcm |
| April 2021 | -12.8% | £10,869pcm |
| April 2020 | -0.6% | £12,471pcm |
| April 2019 | 0.4% | £12,544pcm |
| April 2018 | 2.1% | £12,498pcm |
| April 2017 | -1.9% | £12,240pcm |
| April 2016 | -3.1% | £12,472pcm |
| April 2015 | -2% | £12,876pcm |
| April 2014 | 1.1% | £13,138pcm |
| April 2013 | -0.7% | £12,991pcm |
| April 2012 | 7% | £13,087pcm |
| April 2011 | 12.2% | £12,229pcm |
| April 2010 | 6.8% | £10,896pcm |
| April 2009 | -9% | £10,199pcm |
| April 2008 | 12.1% | £11,209pcm |
| April 2007 | 0% | £10,002pcm |
Properties and Buildingsin SW1X 9HL, William Street, London, SW1
Sales Historyin SW1X 9HL
The last sale was on 30th September 2025 for £2,550,000 and since then the market in the area has increased by 1.5%. The postcode has had a total of 3 sales since 1995.
SW1X 9HL has seen 3 sales in the last three years and 1 sale in the last twelve months.
Sold Sep 2025£2,550,000 | 2 Bed Flat1, William StreetApartment 9, 1, William Street, London, SW1X 9HL
Sold Mar 2024£2,650,000 | 2 Bed Flat1, William StreetApartment 7, 1, William Street, London, SW1X 9HL
Sold Sep 2023£15,200,000 | 3 Bed Flat1, William StreetApartment 4, 1, William Street, London, SW1X 9HL
Nearby Postcodesto SW1X 9HL
SW1X 9HL is the 833rd largest and the 1465th most expensive postcode out of the 1,807 postcodes in the SW1X area.
- 28 mSW1X 8ET, Duplex Ride, London, SW1SW1X 8ET1 Addresses
- 39 mSW1X 9HH, William Street, London, SW1SW1X 9HH9 Addresses
- 42 mSW1X 8EL, Studio Place, London, SW1SW1X 8EL12 Addresses
- 62 mSW1X 8EJ, Kinnerton Place North, London, SW1SW1X 8EJ10 Addresses
- 65 mSW1X 8EW, Studio Place, London, SW1SW1X 8EW5 Addresses
- 67 mSW1X 7JP, Knightsbridge, London, SW1SW1X 7JP18 Addresses
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Property Typesin SW1X 9HL
- 1 period flat built between 1800 and 1911
- 9 modern flats built after 1980
- 2 other addresses of unknown type
- period flat (1)
- modern flat (9)
- Unknown (2)
Energy Efficiencyof properties in SW1X 9HL
- Energy Performance Certificate (EPC) surveys conducted for 9 properties.
- The dominant rating is D.
- A (0)
- E (0)
- B (0)
- F (0)
- C (4)
- G (0)
- D (5)
- No EPC (3)
Top 3 Most Expensive Saleson William Street
- Sold Sep 2023£15,200,000 | 3 Bed Flat1, William StreetApartment 4, 1, William Street, London, SW1X 9HL
- Sold Mar 2024£2,650,000 | 2 Bed Flat1, William StreetApartment 7, 1, William Street, London, SW1X 9HL
- Sold Sep 2025£2,550,000 | 2 Bed Flat1, William StreetApartment 9, 1, William Street, London, SW1X 9HL
Schools Nearbyto SW1X 9HL
The nearest primary school to SW1X 9HL is St George's Hanover Square CofE Primary School which is 942 metres away.
- 942mSt George's Hanover Square CofE Primary School
- 955mHoly Trinity CofE Primary School
- 1.0kmSt Peter's Eaton Square CofE Primary School
The nearest secondary school is St. Thomas More Language College which is 1.0 kilometres away.
- 1.0kmSt. Thomas More Language College
- 1.4kmWestminster City School
- 1.8kmThe Grey Coat Hospital
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Public Transport Nearbyto SW1X 9HL
The closest station to SW1X 9HL is Knightsbridge station which is 400 metres away.
- 385mKnightsbridge
- 392mHyde Park Corner
- 1.1kmSloane Square
- 1.2kmGreen Park
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