Flat B, 23 Osborne Road, Southsea, PO5 3LR
About Flat B
Flat B is a one-bedroom end-of-terrace house in Southsea (PO5 3LR). It has a recorded floor area of 42 m² (around 452 sq ft) and construction records dating it to 1900-1929. The latest certificate (June 2025) shows a C (score 72). The rating has held steady at C across 3 certificates since April 2015. Between certificates, lighting went from Poor to Very Good; while window efficiency dropped from Good to Average. Other recorded features include a balcony.
At 42 m² it sits well below the postcode median (64 m² across 31 EPCs), making it one of the more compact homes locally. Today's modelled estimate of £151,000 is 11.9% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£299/sq ft) was about 108.3% above the typical sold price in the postcode. Last sold in August 2015, so it's been off the market for around 11 years.
Know exactly what you're buying at Flat B
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
What this property has
Inside
- Bedrooms1
- Bathrooms1
- Open-plan layoutYes
- Dining roomYes
- FireplaceYes
Outside
- BalconyYes
Energy performance
Flat B's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Cavity wall insulation installed
Floor insulation added or improved
Planning history
Flat B has no planning applications on record.
Notable planning nearby
15applications of note in the surrounding area
We flagged 2 things worth checking at Flat B
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
Flat B valuation sits well clear of the typical sold price in this postcode.
£151,000
Modelled from EPC, postcode comparables.
£135,000
Recorded with HM Land Registry.
Sales timeline
19 August 2015Most recent
£135,000
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 B, 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
Flat B outperforms the street on co₂ emissions by a wide margin.
Price per m²
£3,214
Street avg £2,196
Floor Area
42 m²
Street avg 71 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
1.4 t/year
Street avg 2.9 t/year
Similar properties nearby
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33a, Flat 3, Osborne Road
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4 Elphinstone Flats, Elphinstone Road
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2 Elphinstone Flats, Elphinstone Road
PO5 3HB
2a, First Floor Flat, Nightingale Road
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19 21, Flat 1 8, Kent Road
PO5 3EG
19 21, Flat 8, Kent Road
PO5 3EG
33a, Flat 1, Osborne Road
PO5 3LR
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