20 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH
About 20 Blake House
20 Blake House is a mid-terrace house in Portsmouth (PO1 3TH). It has a recorded floor area of 107 m² (around 1152 sq ft), construction records dating it to 1996-2002 and council tax band E. At 107 m² this is the 35th smallest of 43 units on EPC record in the building, where floor areas span 52–155 m². The building's EPC ratings span E to B across 43 units on file. The latest certificate (June 2018) shows a D (score 62), on the cusp of jumping into the C band. Main heating runs on electricity.
It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs). 5 planning records sit against the property, 0 approved, 0 refused.
Energy performance
EPC Rating
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Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £1,085 · Includes VAT
Planning history
5 applications on record at 20 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH
- Jan 2010FullOutcome in report
Extension to existing north/west facing raised terrace to include new timber & glass balustrading to perimeter and stairs (after removal of section of stairs) and fixed umbrellas; installation of new glazed window and cladding to north elevation (Amended Scheme 09/01307/FUL)
New Windows- Documents
- 6 docs on file
- Reference
- 09/01486/FUL
- More recent applications — locked
- AdvertisingOct 2013Decision
- FullMar 2010Decision
+ 2 more applications in the report
Unlock 20 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (5 on record)
- All 5 applications on this property in full, plus 3 notable nearby
- The 48 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
20 Blake House has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£538,000
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 PO1 3TH: £550,000 (2025–2022).
Nearby sales in PO1 3TH
11 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH
Sold Mar 2025
£550,00040 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH
Sold Jan 2025
£794,50039 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH
Sold Feb 2024
£862,50053 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH
Sold Oct 2023
£440,00029 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH
Sold Aug 2022
£455,000
Versus other Gunwharf Quays homes
EPC Rating for 20 Blake House lags the street by a wide margin.
EPC Rating
62 (D)
Street avg 73 (C)
Floor Area
107 m²
Street avg 92 m²
CO₂ Emissions
3.3 t/year
Street avg 2.3 t/year
Habitable Rooms
4 rooms
Street avg 3 rooms
Similar properties nearby
1 Blake House, Gunwharf Quays
PO1 3TH
1 Blossom Square
PO1 3JH
1 Blackthorn Terrace, Cumberland Street
PO1 3JW
1 Centurion Court, The Canalside, Gunwharf Quays
PO1 3BQ
1 Dean Street
PO1 3BH
1 Arethusa House, Gunwharf Quays
PO1 3TQ
1 Ensign Mews, Cross Street
PO1 3FZ
1 Curzon Howe Road
PO1 3BZ
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
9/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Portsmouth IOW Car Ferry Terminal — ferry terminal.
Closest school
0.6 km
St George's Beneficial Church of England (Voluntary Controlled) Primary School. 28 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
46.9dB

Night-time· 23:00 – 07:00
39.6dB







