23 Castle Street, Southampton, SO14 6GZ
About 23 Castle Street
23 Castle Street is a two-bedroom mid-terrace house in Southampton (SO14 6GZ). It has a recorded floor area of 77 m² (around 824 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (October 2010) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in October 2010 the rating was E, the property has climbed 1 band since. The recommended improvements would push it to C (score 74). The latest certificate is from October 2010, so improvements made since then won't be reflected.
Held since May 2011 — that's 15 years off the open market, well above the local norm. Across the public record there are 4 sales, relatively high churn for a single property. One planning record on file: an extension approved in 2013. Past consents include an extension, meaningful when judging how the property has evolved. Across 1997–2011, sale prices on this property compounded at 7.7% per year. Today's modelled estimate of £250,000 is 39.7% above the 2011 sale price.
What this property has
Inside
- Bedrooms2
Energy performance
23 Castle Street's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 10 Oct 2020
EPC Rating
Certificate validity
Expired on 10 October 2020
Property Improvements
Changes detected from historical EPC data
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has been extended more than once, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
23 Castle Street has an approved single-storey extension on the planning record.
1 application on record at 23 Castle Street, Southampton, SO14 6GZ
- Jan 2013ExtensionFullOutcome in report
Extension: Single storey
Erection of a single storey front extension and single storey rear extension (part retrospective)
Retrospective- Documents
- 7 docs on file
- Reference
- 12/01649/FUL
Unlock 23 Castle Street, Southampton, SO14 6GZ's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 38 notable nearby
- The 7 documents, officer reports & conditions
- What the pattern means for extending or converting here
One time fee only - money back guarantee
Sales history & valuation
Sale price has at least doubled since 1997.
£250,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.7% per year over 14 years.
£179,000
Growth on file: 7.7% per year over 14 years.
Sales timeline
26 May 2011Most recent
£179,000
+7.2%over 5 years25 October 2005
£167,000
+74.0%over 4 years22 May 2001
£96,000
+47.8%over 3 years11 September 1997
£64,950
Median price across the last 5 sales in SO14 6GZ: £232,000 (2025–2021).
Nearby sales in SO14 6GZ
Versus other Castle Street homes
23 Castle Street outperforms the street on years held by a wide margin.
Price per m²
£2,339
Street avg £3,184
Floor Area
77 m²
Street avg 76 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
3.6 t/year
Street avg 2.8 t/year
Similar properties nearby
The neighbourhood at a glance
Crime
413/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Denzil Avenue — bus stop.
Closest school
0.3 km
Bevois Town Primary School. 38 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
54.7dB

Night-time· 23:00 – 07:00
44.5dB







