Model valuation£417,0008 Busby Close
Local market context
20 First Avenue, Cosham, Portsmouth, PO6 3JH
Property type
Semi-detached
Habitable rooms
6
From EPC
Floor area
79 m²
850 sq ft
Energy rating
C
Score 71
Council tax
Band B
Tenure
Owner Occupied
About 20 First Avenue
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
20 First Avenue is a semi-detached house in Cosham, Portsmouth, Portsmouth (PO6 3JH). It has a recorded floor area of 79 m² (around 850 sq ft), construction records dating it to 1930-1949 and council tax band B. The latest certificate (May 2023) shows a C (score 71). When first surveyed in January 2022 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Good to Very Good and window efficiency went from Average to Good. The recommended improvements would push it to B (score 85).
Today's modelled estimate of £281,000 is 10.4% below the 2022 sale of £313,500, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£369/sq ft) was about 122.2% above the typical sold price in the postcode. Its energy rating outperforms most of the postcode (better than 70% of similar EPCs). Most recent transfer: November 2022 at £313,500. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
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Everything you need to know about 20 First Avenue
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Signs of HMO activity in the areaLarger development activity nearby
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The data behind every report
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Current Certificate(1 of 2)
May 2023
EPC Rating
A
B
C
C71
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Good
CO2 Emissions
2.6 t/year
Occupancy
Owner Occupied
Certificate validity
Valid until 12 May 2033
Property Improvements
Changes detected from historical EPC data
May 2023from Jan 2022
EPC improved fromD68toC71
Windows
AverageGood
Window efficiency improved
Roof
GoodVery Good
Roof insulation improved
Low Energy Lighting
75%100%
More low energy lighting installed
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Level 2 HomeBuyer Report
Early 20th centurySemi-Detached HouseEPC C
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Planning history
Applications and permits filed against 20 First Avenue, Cosham, Portsmouth, PO6 3JH, sourced from the PlanIt planning register.
20 First Avenue has no planning applications on record.
13
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
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Latest sale on 20 First Avenue was the highest on Land Registry record across the postcode.
Current estimate
See how we calculated this£281,000
Modelled from EPC, postcode comparables.
Last sold (2022)
£313,500
Recorded with HM Land Registry.
Sales timeline
18 November 2022Most recent
£313,500
Median price across the last 5 sales in PO6 3JH: £270,000 (2026–2015).
Nearby sales in PO6 3JH
22 First Avenue, Cosham, Portsmouth, PO6 3JH
Sold Feb 2026
£303,0007 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
£270,00013 First Avenue, Cosham, Portsmouth, PO6 3JH
Sold Jun 2015
£192,500
Versus other First Avenue homes
Four headline reads against 20 similar houses on this street, drawn from the latest EPC and Land Registry data.
Habitable Rooms for 20 First Avenue runs comfortably ahead of the street norm.
Price per m²
£3,968
Street avg £2,274
Floor Area
79 m²
Street avg 83 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
2.6 t/year
Street avg 3.2 t/year
Property research, connected
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Start your researchSimilar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the Portsmouth district page.
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
Modelled day and night-time noise levels around PO6 3JH from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
55.4dB
Night-time· 23:00 – 07:00
45.9dB
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4Common questions
The questions buyers, sellers and homeowners most often ask about 20 First Avenue, Cosham, Portsmouth, PO6 3JH. Each answer is also embedded as structured data for search engines.