Flat 1, 16 Cottage Grove, Southsea, PO5 1EN
About Flat 1
Flat 1 is a semi-detached house in Southsea (PO5 1EN). It has a recorded floor area of 46 m² (around 495 sq ft) and construction records dating it to 1900-1929. At 46 m² this is the largest unit on EPC record across the building (22–46 m²). The latest certificate (November 2019) shows a C (score 74). The rating has held steady at C across 2 certificates since January 2009. Between certificates, wall efficiency went from Very Poor to Good and lighting went from Good to Very Good.
It hasn't traded since April 2004, a hold of 22 years that's notably long for the area. Across 2002–2004, sale prices on this property compounded at 21.6% per year. Today's modelled estimate of £269,000 is 17% above the 2004 sale price. On a £-per-square-foot basis, the last sale (£465/sq ft) was about 171.8% above the typical sold price in the postcode.
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
Flat 1's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Cavity wall insulation installed
Planning history
Flat 1 has no planning applications on record.
Notable planning nearby
111applications 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
- Recent ownership pattern worth a look
30-day money-back guarantee
Sales history & valuation
Flat 1 changed hands twice within eighteen months — unusual for the area.
£269,000
Modelled from EPC, postcode comparables and a sale-price growth of 21.6% per year over 1 year.
£230,000
Growth on file: 21.6% per year over 1 year.
Sales timeline
29 April 2004Most recent
£230,000
+33.5%over 1 year7 November 2002
£172,250
Median price across the last 5 sales in PO5 1EN: £305,000 (2023–2022).
Nearby sales in PO5 1EN
26a, Top Flat, Cottage Grove, Southsea, PO5 1EN
Sold Nov 2023
£305,00014 Cottage Grove, Southsea, PO5 1EN
Sold Aug 2023
£335,00018 Cottage Grove, Southsea, PO5 1EN
Sold Mar 2023
£220,00022a, Cottage Grove, Southsea, PO5 1EN
Sold Feb 2022
£350,000Flat 2a, 2 Cottage Grove, Southsea, PO5 1EN
Sold Feb 2022
£130,000
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
- Recent ownership pattern worth a look

Versus other Cottage Grove homes
Flat 1 outperforms the street on price per m² by a wide margin.
Price per m²
£5,000
Street avg £2,214
Floor Area
46 m²
Street avg 48 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
1.4 t/year
Street avg 2.2 t/year
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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
54.2dB

Night-time· 23:00 – 07:00
43.1dB