11a, Testwood Road, Southampton, SO15 8RQ
About 11a
11a is a property in Southampton (SO15 8RQ). It has a recorded floor area of 38 m² (around 409 sq ft) and construction records dating it to 1900-1929. At 38 m² this is the smallest unit on EPC record across the building (38–115 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (52 versus a best of 80). The latest certificate (June 2025) shows an E (score 52), well below the UK norm with real room to improve. Earlier certificates rated it C (June 2025); the latest reading is 2 bands lower. Between certificates, window efficiency went from Poor to Average and lighting went from Good to Very Good; while hot-water efficiency dropped from Good to Average and main heating dropped from Good to Average. The recommended improvements would push it to D (score 64). Main heating runs on electricity.
At 38 m² it sits well below the postcode median (90 m² across 10 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement.
Everything you need to know about 11a
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
11a sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system changed
Changed to a more efficient fuel source
Heating controls changed
Hot water system changed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
11a has no planning applications on record.
But the area is active
5 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
11a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£164,000
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 SO15 8RQ: £210,000 (2023–2014).
Nearby sales in SO15 8RQ
Versus other Testwood Road homes
On epc rating, 11a runs well behind the street norm.
EPC Rating
52 (E)
Street avg 70 (C)
Floor Area
38 m²
Street avg 59 m²
CO₂ Emissions
1.1 t/year
Street avg 1.3 t/year
Habitable Rooms
2 rooms
Street avg 3 rooms
Everything you need to know about 11a
The true value, the hidden risks and the full sale history, in one report.
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Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
12/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Millbrook Station — bus stop.
Closest school
0.5 km
Freemantle Church of England Community Academy. 30 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
46.6dB