23 Calton Avenue, Southwark, London, SE21 7DE
About 23 Calton Avenue
23 Calton Avenue is a mid-terrace house in Southwark, London, London (SE21 7DE). It has a recorded floor area of 123 m² (around 1324 sq ft), construction records dating it to before 1900 and council tax band C. The latest certificate (March 2019) shows an E (score 52), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 81), a 3-band jump.
Across 1996–2024, sale prices on this property compounded at 7.9% per year. Today's modelled estimate of £1,325,000 is 10.5% below the 2024 sale of £1,480,000, running counter to the wider postcode trend, which makes the EPC and condition history especially worth a look. On a £-per-square-foot basis, the last sale (£1,118/sq ft) was about 142.7% above the typical sold price in the postcode. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. One planning record on file: a loft conversion approved in 2010. Past consents include a loft conversion, meaningful when judging how the property has evolved. Last sale on file: £1,480,000 in October 2024.
Energy performance
23 Calton Avenue sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, has been extended more than once, and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £1,645 · Includes VAT
Planning history
1 application on record at 23 Calton Avenue, Southwark, London, SE21 7DE
- Aug 2010Loft ConversionFullOutcome in report
Loft conversion including new dormer window, new heritage rooflight and new window to gable. New rooflights to back section of house. Reconfigured window to rear elevation of house.
- Documents
- 11 docs on file
- Reference
- 10/AP/1908
Unlock 23 Calton Avenue, Southwark, London, SE21 7DE'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- Every decision — granted, refused or withdrawn (1 on record)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 11 documents, officer reports & conditions
- What the pattern means for extending or converting here
One time fee only - money back guarantee
Sales history & valuation
Price for 23 Calton Avenue has grown more than fourfold since the 1996 starting point.
£1,325,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.9% per year over 28 years.
£1,480,000
Growth on file: 7.9% per year over 28 years.
Sales timeline
17 October 2024Most recent
£1,480,000
+32.7%over 5 years25 July 2019
£1,115,000
+109.2%over 12 years2 February 2007
£533,000
+113.2%over 8 years21 May 1998
£250,000
+45.3%over 1 year18 July 1996
£172,000
Median price across the last 5 sales in SE21 7DE: £1,295,000 (2025–2019).
Nearby sales in SE21 7DE
17 Calton Avenue, Southwark, London, SE21 7DE
Sold Jul 2025
£1,500,0007 Calton Avenue, Southwark, London, SE21 7DE
Sold Dec 2021
£1,125,00011 Calton Avenue, Southwark, London, SE21 7DE
Sold Nov 2019
£1,025,00015 Calton Avenue, Southwark, London, SE21 7DE
Sold Aug 2018
£850,0001 Calton Avenue, Southwark, London, SE21 7DE
Sold Sept 2017
£16,000
Versus other Calton Avenue homes
EPC Rating for 23 Calton Avenue lags the street by a wide margin.
Price per m²
£12,033
Street avg £9,076
Floor Area
123 m²
Street avg 151 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
6.4 t/year
Street avg 4.8 t/year
Similar properties nearby
1 Desenfans Road, Southwark
SE21 7DN
1 Hunts Slip Road, Southwark
SE21 7LJ
1 Mitchell S Place, Southwark
SE21 7JZ
1 Pond Cottages, College Road, Southwark
SE21 7LE
1 Red Post Hill, Southwark
SE21 7BX
1 Pickwick Road, Southwark
SE21 7JN
1 Druce Road, Southwark
SE21 7DW
1 Ryecotes Mead, Southwark
SE21 7EP
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
0.2 km
Dulwich Village — bus stop.
Closest school
0.2 km
Dulwich Village Church of England Infants' School. 68 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
52.3dB

Night-time· 23:00 – 07:00
42.0dB







