303a, Copnor Road, Portsmouth, PO3 5EG
About 303a
303a is a mid-terrace house in Portsmouth (PO3 5EG). It has a recorded floor area of 94 m² (around 1012 sq ft), construction records dating it to 1930-1949 and council tax band B. The latest certificate (June 2024) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 3 certificates since March 2013. Between certificates, wall efficiency went from Poor to Average, roof efficiency went from Very Poor to Average and lighting went from Good to Very Good. The recommended improvements would push it to C (score 73). At 94 m² this is the 23rd smallest of 28 units on EPC record in the building, where floor areas span 41–124 m². The building's EPC ratings span F to C across 28 units on file.
At 94 m² the property is well over the postcode median (67 m² across 27 EPCs), placing it in the larger end of the local stock. Most recent transfer: March 2020 at £250,000. Across the public record there are 4 sales, relatively high churn for a single property. Across 1998–2020, sale prices on this property compounded at 7% per year. Today's modelled estimate of £288,000 is 15.2% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£247/sq ft) was about 106.5% above the typical sold price in the postcode.
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system changed
Hot water system changed
Cavity wall insulation installed
Roof insulation improved
More low energy lighting installed
Upgraded to gas central heating
Hot water system upgraded
Roof insulation improved
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Planning history
303a has no planning applications on record.
But the area is active
10 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Price for 303a has grown more than fourfold since the 1998 starting point.
£288,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.0% per year over 21 years.
£250,000
Growth on file: 7.0% per year over 21 years.
Sales timeline
20 March 2020Most recent
£250,000
+4.2%over 3 years31 August 2016
£240,000
+65.5%over 2 years14 February 2014
£145,000
+145.8%over 15 years11 December 1998
£59,000
Median price across the last 5 sales in PO3 5EG: £200,000 (2025–2019).
Nearby sales in PO3 5EG
Versus other Copnor Road homes
Habitable Rooms for 303a runs comfortably ahead of the street norm.
Price per m²
£2,660
Street avg £2,257
Floor Area
94 m²
Street avg 69 m²
Habitable Rooms
4 rooms
Street avg 3 rooms
CO₂ Emissions
3.3 t/year
Street avg 3.2 t/year
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
18/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
College Park — bus stop.
Closest school
0.2 km
Mayfield School. 34 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
51.6dB

Night-time· 23:00 – 07:00
41.6dB







