21a, Unit 23, Rothsay Street, Southwark, London, SE1 4BF
About 21a
21a is a property in Southwark, London, London (SE1 4BF). It has a recorded floor area of 111 m² (around 1195 sq ft) and construction records dating it to 2003-2006. The latest certificate (February 2026) shows a D (score 60), on the cusp of jumping into the C band. Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition.
At 111 m² the property is well over the postcode median (60 m² across 35 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs). One historical planning record sits against the property in 2020.
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
21a's carbon output is low for the local stock.
EPC Rating
Certificate validity
Valid until 4 February 2036
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 £1,360 · Includes VAT
Planning history
1 application on record at 21a, Unit 23, Rothsay Street, Southwark, London, SE1 4BF
- Mar 2020AmendmentOutcome in report
Certificate of Lawful Development (Existing) to confirm that the property continuously used as a residential flat
Retrospective- Documents
- 6 docs on file
- Reference
- 20/AP/0523
Unlock 21a, Unit 23, Rothsay Street, Southwark, London, SE1 4BF's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 6 notable nearby
- The 6 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
21a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£841,000
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
EPC Rating for 21a lags the street by a wide margin.
EPC Rating
60 (D)
Street avg 74 (C)
Floor Area
111 m²
Street avg 69 m²
CO₂ Emissions
1.0 t/year
Street avg 2.0 t/year
Habitable Rooms
4 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.
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The neighbourhood at a glance
Crime
1516/mo
Steady 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