Our Data Sources
21, The Polygon, Southampton has a single entry in the Land Registry from January 2021 and a single entry in the EPC database dated December 2021.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 2 out of 5 and is considered of medium accuracy.
Price Range & Condition
In very good condition, we estimate 21, The Polygon, Southampton would be worth £257,845, with a potential rental value of £1,157 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £228,377, with a rental value of £1,024 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Energy Efficiency
21, The Polygon, Southampton has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 02 Dec 2021.
The property is not connected to mains gas and has single glazed windows. It is heated using a boiler and radiators (mains gas).
Sold Prices
21, The Polygon, Southampton last changed hands on 22nd January 2021, selling for £270,000. The transaction was logged as a leasehold flat by HM Land Registry.
That is its only recorded sale since 1995.
The market for similar properties has dropped by 19.5% since January 2021.
- Sold Jan 2021£270,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 50 sales of comparable properties within 370 metres of 21, The Polygon, Southampton since 2017.
Most recently, Flat 10, Osborne House, Grosvenor Square, Southampton, SO15 2DA, a leasehold flat, sold at £270,000 on the 21st January 2026.
Read more about house prices in SO15.
- Sold Jan 2026£270,000 | 3 Bed FlatFlat 10, Osborne House, Grosvenor Square, Southampton, SO15 2DAFlat 10, Osborne House, Grosvenor Square, Southampton, SO15 2DA
- Sold Dec 2025£283,000 | 3 Bed FlatFlat 23, Osborne House, Grosvenor Square, Southampton, SO15 2DAFlat 23, Osborne House, Grosvenor Square, Southampton, SO15 2DA
- Sold Oct 2025£250,000 | 3 Bed FlatFlat 28, Osborne House, Grosvenor Square, Southampton, SO15 2DAFlat 28, Osborne House, Grosvenor Square, Southampton, SO15 2DA
- Sold Jul 2024£222,500 | 3 Bed FlatFlat 62, Parkview 5, Handel Road, Southampton, SO15 2NZFlat 62, Parkview 5, Handel Road, Southampton, SO15 2NZ
- Sold Jun 2024£285,000 | 3 Bed FlatFlat 19, Osborne House, Grosvenor Square, Southampton, SO15 2DAFlat 19, Osborne House, Grosvenor Square, Southampton, SO15 2DA
Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Explore Nearby Properties
The surrounding properties have an average estimated value of £345,144, ranging from £123,730 to £579,337.
- 21C The Polygon
1 Bed Flat | 0 m | Est. Value: £150,335
- 21B The Polygon
3 Bed Flat | 0 m | Est. Value: £247,057
- 21A The Polygon
3 Bed Flat | 0 m | Est. Value: £264,369
- 23 The Polygon
5 Bed House | 9 m | Est. Value: £503,440
- 25 The Polygon
5 Bed House | 13 m | Est. Value: £515,320
Location Comparison
Our analysis of the public data ranks 21, The Polygon, Southampton as the 20th largest and the 18th most expensive of the 60 addresses on The Polygon, Southampton, SO15.
Against the SO15 postcode district average, it is £9k less expensive than the typical property.
More reading links
Schools Nearby
- Springhill Catholic Primary School500 m away
- Banister Primary School800 m away
- Freemantle Church of England Community Academy1.1 km away
- St Anne's Catholic School700 m away
- Upper Shirley High School2.4 km away
- Regents Park Community College2.6 km away
More reading links
Public Transport Nearby
- Southampton Central|300 m away
- Millbrook (Hants)|1.6 km away
- St Denys|2.1 km away
Available Internet Speeds
Ofcom's latest figures show ultrafast broadband available in this area.
According to recent data from Ofcom, Ultrafast Broadband available in this area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
