Our Data Sources
21B, The Polygon, Southampton has 2 entries in the Land Registry, most recently in July 2023 and a single entry in the EPC database dated July 2020.
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
The condition of a property plays an important role in determining its value, with the degree of impact varying by property type, size and location.
For 21B, The Polygon, Southampton, we estimate a market value of £259,410 and a rental value of £1,157 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £229,763 and £1,025 per month respectively.
Energy Efficiency
21B, The Polygon, Southampton has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 01 Jul 2020.
The property is connected to mains gas and has single glazed windows. It is heated using a boiler and radiators (mains gas).
Sold Prices
The most recent sale of 21B, The Polygon, Southampton completed on 27th July 2023 at £265,000 and was recorded by HM Land Registry as a leasehold flat.
Since 1995 the property has sold twice.
Values of comparable properties have dropped by 24.6% over the period since July 2023.
- Sold Jul 2023£265,000
- Sold Dec 2020£240,000
Similar Properties Sold Nearby
Since 2017 48 properties similar to 21B, The Polygon, Southampton have sold within a radius of 370 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 21st January 2026, was Flat 10, Osborne House, Grosvenor Square, Southampton, SO15 2DA, a leasehold flat which sold for £270,000.
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 £345,009, ranging from £123,730 to £579,337.
- 21C The Polygon
1 Bed Flat | 0 m | Est. Value: £150,335
- 21 The Polygon
3 Bed Flat | 0 m | Est. Value: £245,567
- 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
Of the 60 addresses on The Polygon, Southampton, SO15, 21B, The Polygon, Southampton comes out as the 18th largest and the 17th most expensive in our analysis of the public data.
It is also £8k less expensive than the average property across the SO15 district.
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
Broadband here reaches ultrafast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Ultrafast Broadband available in this area.
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
