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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
Overview

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 75% 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 50.1% above the typical sold price in the postcode.

Specifications

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
£14.99one-off

30-day money-back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

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.

EPC 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
Planning

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.

Notable planning nearby

13applications of note in the surrounding area

Before you offer

We flagged 2 things worth checking at 12 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
£14.99

30-day money-back guarantee

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.

Latest sale on 12 Cosham Park Avenue was the highest on Land Registry record across the postcode.

Current estimate

£347,000

Modelled from EPC, postcode comparables and a sale-price growth of 1.6% per year over 7 years.

See how we calculated this
Last sold (2025)

£345,000

Growth on file: 1.6% per year over 7 years.

Sales timeline

  1. 7 November 2025Most recent

    £345,000

    +11.3%over 6 years

  2. 8 February 2019

    £310,000

Median price across the last 5 sales in PO6 3BG: £305,000 (2024–2016).

On the street

Versus other Cosham Park Avenue homes

Four headline reads against 8 similar houses on this street, drawn from the latest EPC and Land Registry data.

Years Held for 12 Cosham Park Avenue lags the street by a wide margin.

Price per m²

£3,632

Street avg £3,305

Strongly above

Floor Area

95 m²

Street avg 110 m²

Strongly below

Habitable Rooms

5 rooms

Street avg 5 rooms

Below

CO₂ Emissions

6.9 t/year

Street avg 4.8 t/year

Strongly below
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
£14.99one-off

30-day money-back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£387k

1 Colwell Road

PO6 3HH

3 bed1 bath
£278k

1 Bromyard Crescent

PO6 3SP

3 bed1 bath
£251k

1 Blakemere Crescent

PO6 3SG

3 bed
£241k

1 Fairfield Square

PO6 3JS

3 bed
£225k

1 Bell Road

PO6 3NX

3 bed
£412k

1 Cosham Park Avenue

PO6 3BG

4 bed2 bath
£270k

1 Dame Judith Way

PO6 3FJ

2 bed1 bath
£164k

1 Abbeymede, Sixth Avenue

PO6 3PG

2 bed
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.
Full Portsmouth report

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.

Noise

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 road noise heatmap for PO6 3BG

Daytime· 07:00 – 23:00

55.6dB

Moderate
Night-time road noise heatmap for PO6 3BG

Night-time· 23:00 – 07:00

46.1dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
FAQ

Common 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.