Flat 1, 65 Cottage Grove, Southsea, PO5 1AH
About Flat 1
Flat 1 is a mid-terrace house in Southsea (PO5 1AH). It has a recorded floor area of 69 m² (around 743 sq ft), construction records dating it to 1900-1929 and council tax band A. At 69 m² this is the largest unit on EPC record across the building (44–69 m²). The building's EPC ratings span D to C, with this unit at the top. The latest certificate (August 2022) shows a C (score 75), near the top of the C band. Earlier certificates rated it B (December 2009); the latest reading is one band lower. Between certificates, wall efficiency dropped from Good to Poor and window efficiency dropped from Good to Average.
Across 2010–2024, sale prices on this property compounded at -0.5% per year. Today's modelled estimate of £174,000 sits 58.2% above the 2024 sale of £110,000. On a £-per-square-foot basis, the last sale (£148/sq ft) was about 43.6% below the postcode norm. At 69 m² it's 19% larger than the typical home in the postcode (58 m² median across 3 EPCs). One planning record on file: an extension refused in 2008. Most recent transfer: April 2024 at £110,000.
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
- Jul 2008ExtensionFullIn report
Extension: Rear of property
Construction of three storey rear extension
- Reference
- 08/00901/FUL
We flagged 1 thing 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
30-day money-back guarantee
Sales history & valuation
Flat 1's sale-price growth has lagged the wider UK trajectory across its history on file.
£174,000
Modelled from EPC, postcode comparables and a sale-price growth of -0.5% per year over 14 years.
£110,000
Growth on file: -0.5% per year over 14 years.
Sales timeline
28 April 2024Most recent
£110,000
-12.0%over 8 years1 October 2015
£125,000
+5.9%over 5 years6 May 2010
£118,000
Median price across the last 4 sales in PO5 1AH: £155,750 (2023–2007).
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

Versus other Cottage Grove homes
On floor area, Flat 1 stands well clear of the street.
EPC Rating
75 (C)
Street avg 68 (D)
Floor Area
69 m²
Street avg 54 m²
CO₂ Emissions
1.8 t/year
Street avg 2.2 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
Similar properties nearby
165a, Flat 2, Elm Grove
PO5 1LU
23 25, Flat 3 9, St Andrews Road
PO5 1EP
23 25, Flat 9, St Andrews Road
PO5 1EP
111 113, Flat C, Elm Grove
PO5 1LH
23 25, Flat 6, St Andrews Road
PO5 1EP
23 25, Flat 8, St Andrews Road
PO5 1EP
23 25, Flat 7, St Andrews Road
PO5 1EP
23 25, Flat 1, St Andrews Road
PO5 1EP
The neighbourhood at a glance
Crime
11/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Elm Grove — bus stop.
Closest school
0.1 km
Cottage Grove Primary School and Nursery. 31 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
53.8dB

Night-time· 23:00 – 07:00
42.7dB