Our Data Sources
21, Castle Street, Southampton has 21 entries in the Land Registry , most recently in January 2017 and a single entry in the EPC database dated June 2024.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 5 out of 5 and is considered of high accuracy.
Price Range & Condition
In very good condition, we estimate 21, Castle Street, Southampton would be worth £303,271, with a potential rental value of £1,647 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £268,612, with a rental value of £1,459 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
21, Castle Street, Southampton occupies a 85 m2 plot as recorded by HM Land Registry.
Of the 12 other houses in this postcode, 8 have recorded plot sizes, and this one ranks as the 4th largest.
Energy Efficiency
21, Castle Street, Southampton has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 25 Jun 2024.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
21, Castle Street, Southampton last changed hands on 17th January 2017, selling for £210,000. The transaction was logged as a freehold house by HM Land Registry.
In total it has sold twice since 1995.
The market for similar properties has risen by 13.9% since January 2017.
- Sold Jan 2017£210,000
- Sold Sep 2001£85,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 172 sales of comparable properties within 340 metres of 21, Castle Street, Southampton across the last 2 years.
Most recently, 20, Southcliff Road, Southampton, SO14 6GE, a freehold house, sold at £300,000 on the 14th November 2025.
Read more about house prices in SO14.
- Sold Nov 2025£300,000 | 3 Bed House20, Southcliff Road, Southampton, SO14 6GE20, Southcliff Road, Southampton, SO14 6GE
- Sold Jun 2025£296,500 | 3 Bed House21, Bath Street, Southampton, SO14 6GX21, Bath Street, Southampton, SO14 6GX
- Sold Jan 2024£285,000 | 3 Bed House21, Cedar Road, Southampton, SO14 6HN21, Cedar Road, Southampton, SO14 6HN
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks 21, Castle Street, Southampton as the 11th largest and the 6th most expensive of the 43 addresses on Castle Street, Southampton, SO14.
Against the SO14 postcode district average, it is £90k more expensive than the typical property.
More reading links
Schools Nearby
- Bevois Town Primary School300 m away
- Mount Pleasant Juniors300 m away
- Mount Pleasant Infants500 m away
- St Anne's Catholic School500 m away
- Upper Shirley High School2.3 km away
- Bitterne Park School2.6 km away
More reading links
Public Transport Nearby
- St Denys|1.0 km away
- Southampton Central|1.4 km away
- Bitterne|1.5 km away
Available Internet Speeds
Ofcom's latest figures show superfast broadband available in this area.
According to recent data from Ofcom, Superfast Broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
