21 First Avenue, Cosham, Portsmouth, PO6 3JH
About 21 First Avenue
21 First Avenue is a semi-detached house in Cosham, Portsmouth, Portsmouth (PO6 3JH). It has a recorded floor area of 73 m² (around 786 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (March 2015) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in November 2013 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Very Good, hot-water efficiency went from Average to Good and lighting went from Average to Very Good. The recommended improvements would lift it to B (score 81), a 2-band jump. The latest certificate is from March 2015, so improvements made since then won't be reflected.
Everything you need to know about 21 First Avenue
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 02 Mar 2025
EPC Rating
Certificate validity
Expired on 2 March 2025
Property Improvements
Changes detected from historical EPC data
Upgraded to gas central heating
Hot water system upgraded
Loft insulation installed or upgraded to 250mm+
More low energy lighting installed
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 £885 · Includes VAT
Planning history
21 First Avenue has no planning applications on record.
But the area is active
13 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
21 First Avenue has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£255,000
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 PO6 3JH: £300,000 (2026–2018).
Nearby sales in PO6 3JH
22 First Avenue, Cosham, Portsmouth, PO6 3JH
Sold Feb 2026
£303,00020 First Avenue, Cosham, Portsmouth, PO6 3JH
Sold Nov 2022
£313,5007 First Avenue, Cosham, Portsmouth, PO6 3JH
Sold Jul 2022
£300,0002 First Avenue, Cosham, Portsmouth, PO6 3JH
Sold Dec 2020
£259,0009 First Avenue, Cosham, Portsmouth, PO6 3JH
Sold Sept 2018
£270,000
Versus other First Avenue homes
On floor area, 21 First Avenue runs well behind the street norm.
EPC Rating
65 (D)
Street avg 64 (D)
Floor Area
73 m²
Street avg 83 m²
CO₂ Emissions
3.1 t/year
Street avg 3.1 t/year
Habitable Rooms
4 rooms
Street avg 5 rooms
Everything you need to know about 21 First Avenue
The true value, the hidden risks and the full sale history, in one report.
Pick your report · from £14.99
One time fee only - 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
260/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
First Avenue — bus stop.
Closest school
0.3 km
Portsdown Primary School. 22 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
55.4dB
Night-time· 23:00 – 07:00
45.9dB