Flat 1, 35 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 51 m² (around 549 sq ft), construction records dating it to 1900-1929 and council tax band A. At 51 m² this is the smallest unit on EPC record across the building (51–58 m²). On EPC score it ranks last in the building (70 versus a best of 77). The latest certificate (August 2023) shows a C (score 70). The rating has held steady at C across 2 certificates since August 2013. Between certificates, wall efficiency went from Good to Very Good; while lighting dropped from Very Good to Good.
5 planning records sit against the property, 0 approved, 3 refused. At 51 m² it's 20.3% smaller than the typical home in the postcode (64 m² median across 31 EPCs).
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
EPC Rating
Planning history
Council records show a subdivision application — the property's legal arrangement has been altered.
- Sept 2010SubdivisionFullIn report
Conversion of part of lower ground floor and all upper floors to form 5 flats and construction of fifth floor to rear projection and dormer to rear roofslope; external alterations to include removal of external staircases (resubmission of 08/02273/FUL)
- Agent
- FAO: Mr Andrew Bain
Extension- Documents
- 6 docs on file
- Reference
- 10/00537/FUL
- Mar 2009FullIn report
Construction of 4-storey building to form 7 flats and part ground floor shop (Class A1) after demolition of existing (re-submission of 08/01452/FUL)
- Agent
- Tim Sage - Chartered Architect Limited
- Documents
- 9 docs on file
- Reference
- 09/00104/FUL
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
Flat 1 has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£157,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
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 co₂ emissions, Flat 1 stands well clear of the street.
EPC Rating
70 (C)
Street avg 64 (D)
Floor Area
51 m²
Street avg 71 m²
CO₂ Emissions
1.8 t/year
Street avg 2.9 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
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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