12a, Flat 6, Powis Street, London, SE18 6LF
About 12a
12a is a detached house in London (SE18 6LF). It has a recorded floor area of 73 m² (around 786 sq ft) and construction records dating it to 1900-1929. At 73 m² this is the 5th smallest of 6 units on EPC record in 12a, where floor areas span 47–83 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (September 2025) shows a C (score 74). When first surveyed in December 2009 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor and roof efficiency went from Very Poor to Good.
At 73 m² the property is well over the postcode median (50 m² across 10 EPCs), placing it in the larger end of the local stock.
Everything you need to know about 12a
The true value, the hidden risks and the full sale history, in one report.
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The data behind every report
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Window efficiency improved
Wall insulation improved
More low energy lighting installed
Heating controls changed
Wall insulation improved
Roof insulation improved
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £1,020 · Includes VAT
Planning history
12a has no planning applications on record.
But the area is active
18 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
12a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£403,000
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 1 sales in SE18 6LF: £2,450,000 (2026–2026).
Nearby sales in SE18 6LF
Versus other Powis Street homes
12a outperforms the street on floor area by a wide margin.
EPC Rating
74 (C)
Street avg 71 (C)
Floor Area
73 m²
Street avg 55 m²
CO₂ Emissions
2.0 t/year
Street avg 2.0 t/year
Habitable Rooms
3 rooms
Street avg 2 rooms
Everything you need to know about 12a
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
The data behind every report
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
13/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Woolwich Arsenal DLR — tram stop.
Closest school
0.5 km
St Peter's Catholic Primary School. 39 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
56.1dB
Night-time· 23:00 – 07:00
47.0dB