21a, Grantham Avenue, Hamble, Southampton, SO31 4JX
About 21a
21a is a detached house in Hamble, Southampton, Southampton (SO31 4JX). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to 1967-1975 and council tax band B. The latest certificate (September 2017) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 5 certificates since September 2011. Between certificates, lighting went from Poor to Very Good. The recommended improvements would push it to C (score 74). Main heating runs on electricity. At 74 m² this is the 9th smallest of 32 units on EPC record in the building, where floor areas span 46–143 m². The building's EPC ratings span E to C across 32 units on file.
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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Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
21a has no planning applications on record.
But the area is active
2 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
21a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£186,000
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 SO31 4JX: £190,000 (2024–2020).
Nearby sales in SO31 4JX
25a, Grantham Avenue, Hamble, Southampton, SO31 4JX
Sold Oct 2024
£190,00031d, Grantham Avenue, Hamble, Southampton, SO31 4JX
Sold Sept 2023
£375,00017 Grantham Avenue, Hamble, Southampton, SO31 4JX
Sold Nov 2020
£187,5007 Grantham Avenue, Hamble, Southampton, SO31 4JX
Sold Aug 2020
£325,0001a, Grantham Avenue, Hamble, Southampton, SO31 4JX
Sold Jul 2020
£123,000
Versus other Grantham Avenue homes
CO₂ Emissions for 21a lags the street by a wide margin.
EPC Rating
61 (D)
Street avg 69 (D)
Floor Area
74 m²
Street avg 74 m²
CO₂ Emissions
4.7 t/year
Street avg 2.7 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
Everything you need to know about 21a
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
The data behind every report
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The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Beaulieu Road — bus stop.
Closest school
0.5 km
Hamble Primary School. 7 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
46.1dB
Night-time· 23:00 – 07:00
37.8dB