Model valuation£417,0008 Busby Close
Local market context
12 Cosham Park Avenue, Portsmouth, PO6 3BG
Extendable
Property type
Semi-detached
Bedrooms
3
Bathroom
1
Floor area
95 m²
1023 sq ft
Energy rating
E
Score 40
Council tax
Band C
Tenure
Owner Occupied
About 12 Cosham Park Avenue
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
12 Cosham Park Avenue is a three-bedroom semi-detached house in Portsmouth (PO6 3BG). It has a recorded floor area of 95 m² (around 1023 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (November 2017) shows an E (score 40), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 78), a 2-band jump. Period features are noted in the property record. It has already been extended once and our model flags further extension potential, a sign of buyer flexibility.
It changed hands recently, sold November 2025 for £345,000. It lags the bulk of the postcode on energy efficiency (less efficient than 89% of similar EPCs). Across 2019–2025, sale prices on this property compounded at 1.6% per year. On a £-per-square-foot basis, the last sale (£337/sq ft) was about 33.8% above the typical sold price in the postcode.
What this property has
Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.
Inside
- Bedrooms3
- Bathrooms1
- Dining roomYes
Outside
- Private gardenSouth-facing
- DrivewayYes
Building
- Central heatingYes
- Period featuresYes
- Previously extendedYes
- RefurbishedYes
- Extension potentialPossible
Before you decide
Everything you need to know about 12 Cosham Park Avenue
The true value, the hidden risks and the full sale history, in one report.
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.
12 Cosham Park Avenue's carbon output runs well above what efficient homes in the postcode produce.
Current Certificate
Nov 2017EPC Rating
A
B
C
D
E
E40
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Average
Windows
Average
CO2 Emissions
6.9 t/year
Occupancy
Owner Occupied
Certificate validity
Valid until 7 November 2027
Get a survey for this property
Level 3 Building Survey
Victorian-eraSemi-Detached HouseEPC EPre-1919 build
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £955 · Includes VAT
Planning history
Applications and permits filed against 12 Cosham Park Avenue, Portsmouth, PO6 3BG, sourced from the PlanIt planning register.
12 Cosham Park 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.
12 Cosham Park Avenue valuation sits well clear of the typical sold price in this postcode.
Current estimate
See how we calculated this£343,000
Modelled from EPC, postcode comparables and a sale-price growth of 1.6% per year over 7 years.
Last sold (2025)
£345,000
Growth on file: 1.6% per year over 7 years.
Sales timeline
7 November 2025Most recent
£345,000
+11.3%over 6 years8 February 2019
£310,000
Median price across the last 5 sales in PO6 3BG: £325,000 (2025–2018).
Nearby sales in PO6 3BG
4 Cosham Park Avenue, Portsmouth, PO6 3BG
Sold Nov 2025
£310,0001 Cosham Park Avenue, Portsmouth, PO6 3BG
Sold Jul 2025
£370,0006 Cosham Park Avenue, Portsmouth, PO6 3BG
Sold Jun 2024
£325,0009 Cosham Park Avenue, Portsmouth, PO6 3BG
Sold Jan 2018
£305,00010 Cosham Park Avenue, Portsmouth, PO6 3BG
Sold Jan 2016
£245,249
Versus other Cosham Park Avenue homes
Four headline reads against 9 similar houses on this street, drawn from the latest EPC and Land Registry data.
EPC Rating for 12 Cosham Park Avenue lags the street by a wide margin.
Price per m²
£3,632
Street avg £2,827
Floor Area
95 m²
Street avg 106 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
6.9 t/year
Street avg 4.3 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.
£396k
1 Colwell Road
PO6 3HH
3 bed1 bath
£266k
1 Bromyard Crescent
PO6 3SP
3 bed1 bath
£255k
1 Blakemere Crescent
PO6 3SG
3 bed
£251k
1 Fairfield Square
PO6 3JS
3 bed
£225k
1 Bell Road
PO6 3NX
3 bed
£396k
1 Cosham Park Avenue
PO6 3BG
4 bed2 bath
£269k
1 Dame Judith Way
PO6 3FJ
2 bed1 bath
£164k
1 Abbeymede, Sixth Avenue
PO6 3PG
2 bed
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
High Street — bus stop.
Closest school
0.5 km
Court Lane Infant Academy. 26 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 3BG from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
55.6dB
Night-time· 23:00 – 07:00
46.1dB
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 12 Cosham Park Avenue, Portsmouth, PO6 3BG. Each answer is also embedded as structured data for search engines.