21a, Cobbett Road, Southampton, SO18 1HJ
About 21a
21a is a semi-detached house in Southampton (SO18 1HJ). It has a recorded floor area of 91 m² (around 980 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (July 2020) shows a D (score 67), on the cusp of jumping into the C band. When first surveyed in June 2010 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Poor to Average, hot-water efficiency went from Very Poor to Good and lighting went from Good to Very Good; while roof efficiency dropped from Very Good to Good. The recommended improvements would lift it to B (score 82), a 2-band jump.
At 91 m² the property is well over the postcode median (45 m² across 79 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 72% of similar EPCs).
Everything you need to know about 21a
The true value, the hidden risks and the full sale history, in one report.
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The data behind every report
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
Window efficiency improved
More low energy lighting installed
Planning history
21a has no planning applications on record.
Notable planning nearby
5applications of note in the surrounding area
We flagged 1 thing worth checking at 21a
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Signs of HMO activity in the area
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Sales history & valuation
21a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£310,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in SO18 1HJ: £198,000 (2025–2023).
Nearby sales in SO18 1HJ
The Gatehouse, Flat 11, 33 Cobbett Road, Southampton, SO18 1HJ
Sold Sept 2025
£119,00061 Cobbett Road, Southampton, SO18 1HJ
Sold Mar 2025
£300,00017 Cobbett Road, Southampton, SO18 1HJ
Sold Nov 2024
£668,000Birchwood Court, Flat 1, 25 Cobbett Road, Southampton, SO18 1HJ
Sold Oct 2024
£140,00043 Cobbett Road, Southampton, SO18 1HJ
Sold Jun 2023
£198,000
Versus other Cobbett Road homes
On habitable rooms, 21a runs well behind the street norm.
EPC Rating
67 (D)
Street avg 66 (D)
Floor Area
91 m²
Street avg 168 m²
CO₂ Emissions
3.3 t/year
Street avg 5.9 t/year
Habitable Rooms
4 rooms
Street avg 7 rooms
Everything you need to know about 21a
The true value, the hidden risks and the full sale history, in one report.
30-day money-back guarantee
The data behind every report
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
6/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Amira House — bus stop.
Closest school
0.5 km
Bitterne Manor Primary School. 36 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode
Daytime· 07:00 – 23:00
52.3dB
Night-time· 23:00 – 07:00
42.9dB