23, William Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 06 May 2021.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler (mains gas).

23, William Square last changed hands on 5th February 2016, selling for £590,000. The transaction was logged as a leasehold flat by HM Land Registry.

In total it has sold 4 times since 1995.

The market for similar properties has dropped by 22.7% since February 2016.

• Sold Feb 2016£590,000
• Sold Mar 2014£460,000
• Sold Sep 1999£143,000

Land Registry records and our Estate Agent network show 174 sales of comparable properties within 400 metres of 23, William Square since 2018.

Most recently, 21, William Square, London, SE16 5XJ, a leasehold flat, sold at £425,000 on the 13th February 2026.

Read more about house prices in SE16.

• Sold Feb 2026£425,000 | 2 Bed Flat21, William Square, London, SE16 5XJ21, William Square, London, SE16 5XJ
• Sold Jul 2025£440,000 | 2 Bed FlatFlat 35, Lamb Court 69, Narrow Street, London, E14 8EJFlat 35, Lamb Court 69, Narrow Street, London, E14 8EJ
• Sold May 2025£332,500 | 2 Bed Flat4, Sophia Square, London, SE16 5XL4, Sophia Square, London, SE16 5XL
• Sold Aug 2024£465,000 | 2 Bed Flat9, Sophia Square, London, SE16 5XL9, Sophia Square, London, SE16 5XL
• Sold May 2024£467,500 | 2 Bed Flat1, Sophia Square, London, SE16 5XL1, Sophia Square, London, SE16 5XL
• Sold Mar 2024£375,000 | 2 Bed Flat26, Helena Square, London, SE16 5XP26, Helena Square, London, SE16 5XP
• Sold Nov 2023£450,000 | 2 Bed Flat24, Frederick Square, London, SE16 5XR24, Frederick Square, London, SE16 5XR
• Sold Sep 2022£506,000 | 2 Bed Flat33, William Square, London, SE16 5XJ33, William Square, London, SE16 5XJ
• Sold Sep 2022£492,500 | 2 Bed Flat32, Elizabeth Square, London, SE16 5XN32, Elizabeth Square, London, SE16 5XN
• Sold Aug 2022£465,000 | 2 Bed Flat83, Bywater Place, London, SE16 5NE83, Bywater Place, London, SE16 5NE
• Sold Jun 2022£480,000 | 2 Bed Flat33, Edward Square, London, SE16 5EE33, Edward Square, London, SE16 5EE
• Sold Jan 2022£320,000 | 2 Bed Flat11, Sophia Square, London, SE16 5XL11, Sophia Square, London, SE16 5XL
• Sold Jan 2022£475,000 | 2 Bed Flat24, Admiral Place, London, SE16 5NY24, Admiral Place, London, SE16 5NY
• Sold Jun 2021£455,000 | 2 Bed Flat33, Sophia Square, London, SE16 5XL33, Sophia Square, London, SE16 5XL
• Sold Feb 2021£465,000 | 2 Bed Flat9, Helena Square, London, SE16 5XP9, Helena Square, London, SE16 5XP
• Sold Sep 2020£435,000 | 2 Bed Flat39, William Square, London, SE16 5XJ39, William Square, London, SE16 5XJ
• Sold Mar 2020£475,000 | 2 Bed Flat23, Sophia Square, London, SE16 5XL23, Sophia Square, London, SE16 5XL
• Sold Jul 2019£490,000 | 2 Bed Flat29, Edward Square, London, SE16 5EE29, Edward Square, London, SE16 5EE
• Sold Oct 2018£525,000 | 2 Bed Flat11, Edward Square, London, SE16 5EE11, Edward Square, London, SE16 5EE
• Sold Jun 2018£405,000 | 2 Bed Flat25, Edward Square, London, SE16 5EE25, Edward Square, London, SE16 5EE

Our analysis of the public data ranks 23, William Square as the 19th largest and the 19th most expensive of the 39 addresses on William Square, London, SE16.

Against the SE16 postcode district average, it is £55k less expensive than the typical property.

• Peter Hills with St Mary's and St Paul's CofE Primary School

  300 m away
• Redriff Primary, City of London Academy

  600 m away
• Cyril Jackson Primary School

  700 m away

• Bacon's College

  600 m away
• Stepney All Saints Church of England Secondary School

  1.1 km away
• Bishop Challoner Catholic School

  1.2 km away

• Limehouse

  |

  600 m away
• Westferry

  |

  800 m away
• West India Quay

  |

  1.2 km away

Environment Agency data suggests this area has a Very Low risk of flooding.