21a, Flat 7, Rothsay Street, Southwark, London, SE1 4BF
About 21a
21a is a mid-terrace house in Southwark, London, London (SE1 4BF). It has a recorded floor area of 49 m² (around 527 sq ft) and construction records dating it to 2007-2011. At 49 m² this is the 2nd smallest of 35 units on EPC record in 21a, where floor areas span 47–163 m². The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (June 2023) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (February 2013); the latest reading is one band lower. Between certificates, lighting went from Good to Very Good; while hot-water efficiency dropped from Average to Very Poor and main heating dropped from Average to Very Poor. The recommended improvements would lift it to B (score 82), a 2-band jump. Main heating runs on electricity.
At 49 m² it's 19.7% smaller than the typical home in the postcode (61 m² median across 34 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs).
Everything you need to know about 21a
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system changed
Heating controls upgraded for better temperature management
Hot water system changed
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £955 · Includes VAT
Planning history
21a has no planning applications on record.
But the area is active
7 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
21a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£386,000
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.
Versus other Rothsay Street homes
Floor Area for 21a lags the street by a wide margin.
EPC Rating
68 (D)
Street avg 74 (C)
Floor Area
49 m²
Street avg 70 m²
CO₂ Emissions
1.7 t/year
Street avg 2.1 t/year
Habitable Rooms
2 rooms
Street avg 3 rooms
Everything you need to know about 21a
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

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The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
44/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Twr Bridge Rd/Bricklayers Arms — bus stop.
Closest school
0.2 km
Grange Primary School. 97 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
58.2dB

Night-time· 23:00 – 07:00
48.8dB






