16 William Square
SE16 5XJ
- Flat
- Leasehold
- 2 bedrooms (estimate)
- 527 sq ft
- EPC C
What comparable sales show
Strong match£336,000
Range £296,000 to £377,000 · £638 per sq ft
Since last sale
+£88,500
+35.8% since Mar 2012, +2.1% a year
Rank in SE16 5XJ
31st of 34
Postcode average £521,088
From completed sales of similar homes nearby, adjusted for floor area. It cannot see condition, layout or recent work, so it is not a valuation.
In short
16 William Square is a 2 bedroom leasehold flat in SE16 of about 527 sq ft.
Comparable completed sales nearby put it at £296,000 to £377,000, about £336,000 in the middle.
That makes it the 31st highest of the 34 homes we can compare in SE16 5XJ, where the middle figure averages £521,088.
It last sold for £247,500 in March 2012; comparable sales suggest it has gained about £88,500 since, roughly +2.1% a year.
Across Southwark, average prices fell 2.1% in the year to August 2026.
Where in the range would yours sell?
Condition and improvements usually decide it, and only someone who sees the home can say.
Lower end
£296,000
Middle
£336,000
Upper end
£377,000
Done work since the records were made? Claim your home and tell us, or ask local agents where yours sits.
16 William Square on the map
This home and the completed sales its figure is worked out from. Choose a pin for the address, size and date.
The Land Registry records a sale by its postcode, so pins sit at the postcode, close to the home, not on its doorstep. Map: contains OS data © Crown copyright and database rights 2026.
Energy performance certificate
From the official register for 16 William Square, lodged 9 March 2022. Valid until 9 March 2032.
Rating now
C (80)
Could reach
B (82)
Built
1991–1995
What the assessor found
| Part of the home | Description | Energy efficiency |
|---|---|---|
| Walls | Cavity wall, as built, insulated (assumed) | Good |
| Roof | (another dwelling above) | – |
| Floor | (another dwelling below) | – |
| Windows | Fully double glazed | Average |
| Heating | Boiler and radiators, mains gas | Good |
| Heating controls | Programmer, room thermostat and TRVs | Good |
| Hot water | From main system | Good |
| Lighting | Low energy lighting in 58% of fixed outlets | Good |
Estimated running costs
| Each year | Now | After the improvements |
|---|---|---|
| Heating | £177 | £165 |
| Hot water | £71 | £71 |
| Lighting | £66 | £46 |
The assessor's estimates at the energy prices in use when the certificate was made (2022), for a typical household. Today's bills will differ.
Improvements the certificate recommends
| Improvement | Typical cost | Saving a year | Rating after |
|---|---|---|---|
| Low energy lighting for all fixed outlets | £25 | £18 | B (81) |
| Replacement glazing units | £1,000–£1,400 | £13 | B (82) |
Costs and savings are the certificate's own, as estimated when it was made. Each rating assumes the improvements above it are done first.
Sale history
Every sale of this home registered with HM Land Registry since 1995
| Sold | Price paid | Change | A year |
|---|---|---|---|
| March 2012 | £247,500 | +140.3% | +7.2% |
| August 1999 | £103,000 | +22.6% | +5.1% |
| July 1995 | £83,995 | First sale | – |
Homes in SE16 5XJ
Ranked by what comparable sales show. Choose one to see its page.
- 40 William SquareTerracedSold Oct 1996 for £124k£1,041,000#1
- 5 William SquareFlatSold Dec 1995 for £137k£997,000#2
- 15 William SquareFlatSold Nov 1995 for £111k£821,000#3
- 18 William SquareFlatSold Mar 1998 for £139k£748,000#4
- 6 William SquareFlatSold Jul 1999 for £165k£736,000#5
- 20 William SquareFlatSold Jul 1995 for £100k£685,000#6
- 44 William SquareFlatSold Apr 1999 for £143k£632,000#7
- 45 William SquareFlatSold Apr 2002 for £230k£585,000#8
- 12 William SquareFlatSold Sept 2010 for £363k£567,000#9
- 2 William SquareFlatSold Jul 2003 for £250k£562,000#10
- 23 William Square LondonFlatSold Feb 2016 for £590k£561,000#11
- 9 William Square LondonFlatSold Feb 2006 for £270k£547,000#12
- 17 William SquareFlatSold Jul 1995 for £76k£521,000#13
- 10 William SquareFlatSold Jan 2021 for £575k£520,000#14
- 4 William SquareFlatSold Mar 2005 for £250k£517,000#15
- 1 William SquareFlatSold Jan 2015 for £470k£498,000#16
- 8 William SquareFlatSold Feb 2013 for £365k£492,000#17
- 33 William SquareFlatSold Sept 2022 for £506k£475,000#18
- 43 William SquareFlatSold Dec 2004 for £228k£474,000#19
- 34 William SquareFlatSold Oct 2014 for £450k£466,000#20
- 36 William Square LondonFlatSold Jul 2002 for £188k£461,000#21
- 37 William Square LondonFlatSold Nov 2023 for £480k£456,000#22
- 21 William SquareFlat · 2 bed · 678 sq ftSold Feb 2026 for £425k£425,000#23
- 11 William SquareFlatSold Aug 2005 for £210k£424,000#24
- 3 William SquareFlatSold Apr 2021 for £420k£408,000#25
- 39 William SquareFlatSold Sept 2020 for £435k£408,000#26
- 7 William SquareFlatSold Aug 2012 for £280k£390,000#27
- 31 William SquareFlat · 1 bed · 560 sq ftSold Jan 2025 for £328k£351,000#28
- 19 William SquareFlatSold Aug 2021 for £335k£345,000#29
- 35 William SquareFlatSold Jul 2019 for £355k£338,000#30
- 16 William Square (this home)Flat · 2 bed · 527 sq ftSold Mar 2012 for £248k£336,000#31
- 14 William Square LondonFlatSold Nov 2017 for £340k£325,000#32
- 13 William SquareFlatSold Apr 2023 for £315k£316,000#33
- 22 William SquareFlatSold Dec 2003 for £130k£289,000#34
- 41 William Square–
- 42 William Square–
- 46 William Square–
The completed sales behind the figure
Similar homes nearby, registered with HM Land Registry. Choose one to see its page.
| Home | Price | Sold | Size | Per sq ft | Away |
|---|---|---|---|---|---|
| Apartment 14, 392 Rotherhithe StreetSE16 5DS · Flat | £322,000 | Jun 2026 | 538 sq ft | £598 | 0.1 mi |
| 21 William SquareSE16 5XJ · Flat | £425,000 | Feb 2026 | 678 sq ft | £627 | < 0.1 mi |
| 31 William SquareSE16 5XJ · Flat | £328,000 | Jan 2025 | 560 sq ft | £586 | < 0.1 mi |
| 22 Elizabeth SquareSE16 5XN · Flat | £320,000 | Nov 2025 | 452 sq ft | £708 | 0.1 mi |
| 4 Sophia SquareSE16 5XL · Flat | £332,500 | May 2025 | 581 sq ft | £572 | < 0.1 mi |
| 22 Lavender RoadSE16 5DZ · Flat | £317,000 | Mar 2025 | 474 sq ft | £669 | 0.1 mi |
| 25 Lavender RoadSE16 5DZ · Flat | £475,000 | Mar 2025 | 463 sq ft | £1,026 | 0.1 mi |
| 12 Farrins RentsSE16 6NF · Flat | £330,000 | Mar 2025 | 570 sq ft | £578 | 0.2 mi |
| Flat 4, 16 Capstan WaySE16 5HG · Flat | £250,000 | Apr 2026 | 388 sq ft | £645 | 0.2 mi |
| Flat 26, Windsor Court King & Queen WharfSE16 5SJ · Flat | £350,000 | Mar 2025 | 581 sq ft | £602 | 0.2 mi |
| 26 Edward SquareSE16 5EE · Flat | £515,000 | May 2026 | 904 sq ft | £570 | < 0.1 mi |
| 22 Admiral PlaceSE16 5NY · Flat | £465,000 | Oct 2025 | 807 sq ft | £576 | 0.1 mi |
What buyers have paid in SE16
Completed sales in the last 12 months, against the 12 months before
| Type | Sales | Average price | Average size | Per sq ft | On the year |
|---|---|---|---|---|---|
| All homes | 349 | £508,994 | 760 sq ft | £641 | −37.2% |
| Flats | 288 | £457,602 | 686 sq ft | £625 | +1.5% |
| Terraced | 47 | £756,617 | 1,109 sq ft | £710 | +4.0% |
| Semi-detached | 4 | £792,500 | 1,195 sq ft | £735 | +5.2% |
| Detached | 1 | £645,000 | – | – | – |
Find another home
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Contains HM Land Registry data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
Energy performance data © Crown copyright. Licensed under the Open Government Licence v3.0.
Floor area and energy rating from the energy certificate of March 2022.
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