13 William Square
SE16 5XJ
- Flat
- Leasehold
- 1 bedroom (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
+£21,000
+6.7% since Apr 2023, +1.8% a year
Rank in SE16 5XJ
32nd of 34
Postcode average £522,676
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
13 William Square is a 1 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 32nd highest of the 34 homes we can compare in SE16 5XJ, where the middle figure averages £522,676.
It last sold for £315,000 in April 2023; comparable sales suggest it has gained about £21,000 since, roughly +1.8% 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.
On the map
Where 13 William Square is
13 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
How efficient the home is
Energy performance certificate
From the official register for 13 William Square, lodged 2 June 2021.
Rating now
C73 points
Could reach
C76 points
3 points higher with the improvements below
- Built
- 1991–1995
- Solar panels
- None recorded
What the assessor found
Each part of the home, with the certificate's own energy efficiency rating.
Walls
Cavity wall, as built, insulated (assumed)
GoodRoof
(another dwelling above)
Not rated on the certificate
Floor
Solid, no insulation (assumed)
Not rated on the certificate
Windows
Fully double glazed
AverageHeating
Boiler and radiators, mains gas
GoodHeating controls
Programmer and room thermostat
AverageHot water
From main system
GoodLighting
Low energy lighting in 50% of fixed outlets
Good
Estimated running costs
A year, now and after the recommended improvements.
£47 a year less after the improvements
Heating
Hot water
Lighting
The assessor's estimates at the energy prices in use when the certificate was made (2021), for a typical household. Today's bills will differ.
Improvements the certificate recommends
In the certificate's order. Each rating assumes the steps before it are done.
- 1
Floor insulation (solid floor)
Typical cost £4,000–£6,000 · saves about £28 a year
Rating after75C - 2
Low energy lighting for all fixed outlets
Typical cost £15 · saves about £20 a year
Rating after76C
Costs and savings are the certificate's own, as estimated when it was made.
History
What it has sold for
Sale history
Every sale of this home registered with HM Land Registry since 1995
| Sold | Price paid | Change | A year |
|---|---|---|---|
| April 2023 | £315,000 | +98.7% | +3.3% |
| April 2002 | £158,500 | +84.3% | +19.1% |
| October 1998 | £86,000 | −45.2% | −17.6% |
| August 1995 | £156,995 | First sale | – |
Nearby
Neighbours and the sales behind the figure
Homes in SE16 5XJ
Ranked by what comparable sales show. Choose one to see its page.
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 |
The area
SE16 at a glance
What buyers have paid in SE16
Completed sales in the last 12 months, against the 12 months before
Flats
Terraced
Semi-detached
Detached
| Type | Sales | Average price | Average size | Per sq ft | On the year |
|---|---|---|---|---|---|
| All homes | 349 | £508,994 | 760 sq ft | £641 | −37.3% |
| 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 June 2021.
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