18 Dekker Road, Southwark, London, SE21 7DL
About 18 Dekker Road
18 Dekker Road is an end-of-terrace house in Southwark, London, London (SE21 7DL). It has a recorded floor area of 60 m² (around 646 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (April 2020) shows an E (score 54), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since January 2010. Between certificates, lighting went from Poor to Good; while roof efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 81), a 3-band jump.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. One planning record on file: an extension approved in 2025. Past consents include an extension, meaningful when judging how the property has evolved.
Energy performance
18 Dekker Road sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
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 £1,220 · Includes VAT
Planning history
18 Dekker Road has an approved single-storey rear extension on the planning record.
1 application on record at 18 Dekker Road, Southwark, London, SE21 7DL
- Feb 2025ExtensionFullOutcome in report
Extension: Single storey · Rear of property
Construction of a single storey rear extension
- Documents
- 19 docs on file
- Reference
- 24/AP/3710
Unlock 18 Dekker Road, Southwark, London, SE21 7DL'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- Every decision — granted, refused or withdrawn (1 on record)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
- The 19 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
18 Dekker Road has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£717,000
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 Dekker Road homes
On epc rating, 18 Dekker Road runs well behind the street norm.
EPC Rating
54 (E)
Street avg 63 (D)
Floor Area
60 m²
Street avg 61 m²
CO₂ Emissions
3.6 t/year
Street avg 2.8 t/year
Habitable Rooms
4 rooms
Street avg 4 rooms
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
6/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Dulwich Village — bus stop.
Closest school
0.3 km
Dulwich Village Church of England Infants' School. 67 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
52.1dB

Night-time· 23:00 – 07:00
42.0dB







