11 Cosham Park Avenue, Portsmouth, PO6 3BG
About 11 Cosham Park Avenue
11 Cosham Park Avenue is a three-bedroom semi-detached house in Portsmouth (PO6 3BG). It has a recorded floor area of 117 m² (around 1255 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (April 2009) shows a D (score 67), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 72). The latest certificate is from April 2009, so improvements made since then won't be reflected.
Held since December 2009 — that's 16 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £340,000 sits 78.9% above the 2009 sale of £190,000. On a £-per-square-foot basis, the last sale (£151/sq ft) was about 48.2% below the postcode norm. At 117 m² it's 19.6% larger than the typical home in the postcode (98 m² median across 8 EPCs). One historical planning record sits against the property in 2005.
What this property has
Inside
- Bedrooms3
Energy performance
11 Cosham Park Avenue's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 02 Apr 2019
EPC Rating
Planning history
- Dec 2005FullIn report
CONSTRUCTION OF SINGLE STOREY DETACHED BUILDING TO REAR TO FORM DOUBLE GARAGE AND STORE (AFTER DEMOLITION OF EXISTING BUILDING) AND PROVISION OF DROPPED KERB TO ALLOW VEHICULAR ACCESS
- Documents
- 4 docs on file
- Reference
- A*39261/AA
We flagged 2 things worth checking at 11 Cosham Park Avenue
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
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
The latest sale fell during the post-2008 dip, often a low-water mark in price comparisons.
£340,000
Modelled from EPC, postcode comparables.
£190,000
Recorded with HM Land Registry.
Sales timeline
11 December 2009Most recent
£190,000
Median price across the last 5 sales in PO6 3BG: £325,000 (2025–2018).
Nearby sales in PO6 3BG
12 Cosham Park Avenue, Portsmouth, PO6 3BG
Sold Nov 2025
£345,0006 Cosham Park Avenue, Portsmouth, PO6 3BG
Sold Jun 2024
£325,0001 Cosham Park Avenue, Portsmouth, PO6 3BG
Sold May 2021
£326,5009 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
11 Cosham Park Avenue is notably below the street on price per m².
Price per m²
£1,630
Street avg £3,705
Floor Area
117 m²
Street avg 107 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
4.1 t/year
Street avg 5.1 t/year
Similar properties nearby
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1 Fairfield Square
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1 Cosham Park Avenue
PO6 3BG
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
9/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
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
55.6dB

Night-time· 23:00 – 07:00
46.1dB







