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Get started4 Castle Street is a four-bedroom mid-terrace house in Southampton (SO14 6HA). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (January 2019) shows a C (score 70). The rating has held steady at C across 2 certificates since January 2009. Between certificates, wall efficiency dropped from Good to Average and window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 88).
It hasn't traded since March 2001, a hold of 25 years that's notably long for the area. Sale prices here have outpaced Southampton HPI: 19.9% per year against 0% for the wider region. Today's modelled estimate of £280,000 sits 174.5% above the 2001 sale of £102,000. At 54 m² it sits well below the postcode median (82 m² across 8 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 88% of similar EPCs). 2 planning records sit against the property, 2 approved, 0 refused. Past consents include HMO conversion and an extension, meaningful when judging how the property has evolved.
4 Castle Street has an approved single-storey rear extension on the planning record.
Application for a lawful development certificate for the existing use as a house in multiple occupation (HMO, Class C4).
4 Castle Street has more than doubled in price since the earliest registered sale in 1997.
£280,000
Modelled from EPC, postcode comparables and a sale-price growth of 19.9% per year over 4 years.
£102,000
Growth on file: 19.9% per year over 4 years.
On epc rating, 4 Castle Street stands well clear of the street.
Price per m²
£1,889
Street avg £2,300
Floor Area
54 m²
Street avg 81 m²
Habitable Rooms
4 rooms
Reported crime in the wider district is trending notably upward year-on-year.
Crime
9/mo
Rising year-on-year across the wider district.
Nearest stop
0.3 km

Daytime· 07:00 – 23:00
54.5dB

Extension: Single storey · Rear of property
Erection of single storey rear extension.
12 March 2001Most recent
£102,000
+20.0%over 1 year14 September 1999
£85,000
+77.1%over 2 years15 January 1997
£48,000
Median price across the last 5 sales in SO14 6HA: £189,277 (2025–2013).
Street avg 4 rooms
CO₂ Emissions
2.0 t/year
Street avg 3.5 t/year
SO14 6GZ
Denzil Avenue — bus stop.
Closest school
0.3 km
Bevois Town Primary School. 38 schools nearby.
Night-time· 23:00 – 07:00
44.4dB
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