6 Castle Street, Southampton, SO14 6HA
About 6 Castle Street
6 Castle Street is a three-bedroom mid-terrace house in Southampton (SO14 6HA). It has a recorded floor area of 76 m² (around 818 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (January 2019) shows an E (score 53), well below the UK norm with real room to improve. Earlier certificates rated it D (November 2008); the latest reading is one band lower. Between certificates, hot-water efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 84), a 3-band jump.
Untraded for 19 years, with the last transfer in June 2007. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 1997–2007, sale prices on this property compounded at 10.7% per year. Today's modelled estimate of £285,000 sits 52.4% above the 2007 sale of £186,957. On a £-per-square-foot basis, the last sale (£229/sq ft) was about 47.1% above the typical sold price in the postcode.
What this property has
Inside
- Bedrooms3
- Bathrooms1
- Dining roomYes
Energy performance
6 Castle Street sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Certificate validity
Valid until 16 January 2029
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Planning history
6 Castle Street has no planning applications on record.
But the area is active
38 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
6 Castle Street has more than doubled in price since the earliest registered sale in 1997.
£285,000
Modelled from EPC, postcode comparables and a sale-price growth of 10.7% per year over 10 years.
£186,957
Growth on file: 10.7% per year over 10 years.
Sales timeline
28 June 2007Most recent
£186,957
+107.8%over 7 years7 March 2000
£89,950
+32.3%over 2 years20 July 1997
£68,000
Median price across the last 5 sales in SO14 6HA: £195,000 (2026–2015).
Nearby sales in SO14 6HA
4 Castle Street, Southampton, SO14 6HA
Sold Apr 2026
£250,00010 Castle Street, Southampton, SO14 6HA
Sold Jul 2025
£260,00016 Castle Street, Southampton, SO14 6HA
Sold Dec 2021
£175,0002b, Castle Street, Southampton, SO14 6HA
Sold Jun 2015
£189,27712 Castle Street, Southampton, SO14 6HA
Sold Jan 2015
£195,000
Versus other Castle Street homes
6 Castle Street is notably below the street on epc rating.
Price per m²
£2,460
Street avg £2,571
Floor Area
76 m²
Street avg 77 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
4.3 t/year
Street avg 3.1 t/year
Similar properties nearby
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The neighbourhood at a glance
Crime
413/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 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
54.5dB

Night-time· 23:00 – 07:00
44.4dB







