21a, Quayside Road, Southampton, SO18 1AE
About 21a
21a is a semi-detached house in Southampton (SO18 1AE). It has a recorded floor area of 44 m² (around 474 sq ft) and construction records dating it to 1930-1949. At 44 m² this is the 3rd smallest of 24 units on EPC record in the building, where floor areas span 35–145 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (February 2024) shows a C (score 71). When first surveyed in December 2011 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Average to Very Good; while roof efficiency dropped from Very Good to Good.
At 44 m² it sits well below the postcode median (87 m² across 23 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 74% of similar EPCs). Across 2003–2016, sale prices on this property compounded at 2.5% per year. Today's modelled estimate of £149,000 is 25.7% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£250/sq ft) was about 56% above the typical sold price in the postcode. Last sold in February 2016, so it's been off the market for around 10 years.
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
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
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
£149,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.5% per year over 13 years.
£118,500
Growth on file: 2.5% per year over 13 years.
Sales timeline
10 February 2016Most recent
£118,500
+4.4%over 10 years29 June 2005
£113,500
+30.5%over 1 year24 July 2003
£86,950
Median price across the last 5 sales in SO18 1AE: £320,000 (2024–2021).
Nearby sales in SO18 1AE
Versus other Quayside Road homes
On habitable rooms, 21a runs well behind the street norm.
Price per m²
£2,693
Street avg £2,851
Floor Area
44 m²
Street avg 47 m²
Habitable Rooms
2 rooms
Street avg 3 rooms
CO₂ Emissions
1.7 t/year
Street avg 1.8 t/year
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
0.1 km
Quayside Road — bus stop.
Closest school
0.3 km
Bitterne Manor Primary School. 38 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
50.9dB
Night-time· 23:00 – 07:00
42.9dB