Flat 1, 21 Osborne Road, Southsea, PO5 3LR
About Flat 1
Flat 1 is a semi-detached house in Southsea (PO5 3LR). It has a recorded floor area of 81 m² (around 872 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (December 2017) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 69), a 2-band jump.
It hasn't traded since October 2004, a hold of 22 years that's notably long for the area. At 81 m² the property is well over the postcode median (59 m² across 31 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). Across 1996–2004, sale prices on this property compounded at 9.4% per year. Today's modelled estimate of £176,000 sits 107.1% above the 2004 sale of £85,000. On a £-per-square-foot basis, the last sale (£97/sq ft) was about 42.1% below the postcode norm.
Know exactly what you're buying at Flat 1
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Launch offer · save £5
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Planning history
Flat 1 has no planning applications on record.
Notable planning nearby
15applications of note in the surrounding area
We flagged 2 things worth checking at Flat 1
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
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Sales history & valuation
Sale price has at least doubled since 1996.
£176,000
Modelled from EPC, postcode comparables and a sale-price growth of 9.4% per year over 8 years.
£85,000
Growth on file: 9.4% per year over 8 years.
Sales timeline
14 October 2004Most recent
£85,000
+95.4%over 6 years30 January 1998
£43,500
+4.8%over 1 year10 October 1996
£41,500
Median price across the last 5 sales in PO5 3LR: £198,000 (2025–2018).
Nearby sales in PO5 3LR
Flat 3, 35 Osborne Road, Southsea, PO5 3LR
Sold Jun 2025
£10,000Flat 1, 27 Osborne Road, Southsea, PO5 3LR
Sold Jan 2024
£198,00027a, Osborne Road, Southsea, PO5 3LR
Sold Dec 2022
£200,000Flat 2, 27 Osborne Road, Southsea, PO5 3LR
Sold Jul 2021
£190,00029a, Osborne Road, Southsea, PO5 3LR
Sold May 2018
£310,000
Everything we know about Flat 1, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area
- Larger development activity nearby
Versus other Osborne Road homes
On years held, Flat 1 stands well clear of the street.
Price per m²
£1,049
Street avg £2,376
Floor Area
81 m²
Street avg 70 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
4.9 t/year
Street avg 2.8 t/year
Similar properties nearby
46a, Flat 1, Osborne Road
PO5 3LT
26 28, Flat 2, Osborne Road
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19 21, Flat 2, Kent Road
PO5 3EG
26 28, Flat 1 3, Osborne Road
PO5 3LT
26 28, Flat 1, Osborne Road
PO5 3LT
26 28, Flat 3, Osborne Road
PO5 3LT
38a, Flat 2, Osborne Road
PO5 3LT
19 21, Flat 1, Kent Road
PO5 3EG
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
11/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Queens Hotel — bus stop.
Closest school
0.7 km
Cottage Grove Primary School and Nursery. 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
53.0dB
Night-time· 23:00 – 07:00
42.6dB