21 Dewar Street, Southwark, London, SE15 4JP
About 21 Dewar Street
21 Dewar Street is a three-bedroom mid-terrace house in Southwark, London, London (SE15 4JP). It has a recorded floor area of 99 m² (around 1066 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (February 2022) shows a C (score 69), just inside the C band. When first surveyed in December 2010 the rating was E, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Good, window efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would push it to B (score 86). The property has solar panels on record, all of which lower running costs and tend to lift resale appeal. Period features are noted in the property record. The home occupies a cul-de-sac position.
At 99 m² the property is well over the postcode median (56 m² across 31 EPCs), placing it in the larger end of the local stock. One planning record on file: an extension approved in 2024. Past consents include an extension, meaningful when judging how the property has evolved. Across 2003–2022, sale prices on this property compounded at 7.6% per year. On a £-per-square-foot basis, the last sale (£901/sq ft) was about 199.6% above the typical sold price in the postcode. Sold July 2022 for £960,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 21 Dewar Street
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Launch offer · save £5
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms3
- Bathrooms1
Outside
- Cul-de-sacYes
Building
- Solar panelsYes
- Period featuresYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
Single glazing replaced with double or better glazing
Roof insulation improved
More low energy lighting installed
Planning history
- Jun 2024ExtensionFullIn report
Extension: Side of property
Erection of a side return extension and a rear dormer.
- Agent
- Resi Design Ltd
- Documents
- 20 docs on file
- Reference
- 24/AP/1306
We flagged 1 thing worth checking at 21 Dewar Street
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
Price for 21 Dewar Street has grown more than fourfold since the 2003 starting point.
£959,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.6% per year over 19 years.
£960,000
Growth on file: 7.6% per year over 19 years.
Sales timeline
17 July 2022Most recent
£960,000
+113.3%over 11 years26 April 2011
£450,000
+89.1%over 7 years23 June 2003
£238,000
Median price across the last 5 sales in SE15 4JP: £350,000 (2025–2021).
Nearby sales in SE15 4JP
4 Dewar Street, Southwark, London, SE15 4JP
Sold Nov 2025
£775,000Flat 2, 29 Dewar Street, Southwark, London, SE15 4JP
Sold Mar 2025
£350,000Flat 9, 31 Dewar Street, Southwark, London, SE15 4JP
Sold Nov 2022
£332,0003 Dewar Street, Southwark, London, SE15 4JP
Sold Dec 2021
£703,000Flat 6, 31 Dewar Street, Southwark, London, SE15 4JP
Sold May 2021
£327,500
Everything we know about 21 Dewar Street, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Dewar Street homes
21 Dewar Street outperforms the street on price per m² by a wide margin.
Price per m²
£9,697
Street avg £7,058
Floor Area
99 m²
Street avg 96 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
3.2 t/year
Street avg 4.1 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
11/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Peckham Rye /East Dulwich Road — bus stop.
Closest school
0.0 km
Bellenden Primary School. 81 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
54.6dB

Night-time· 23:00 – 07:00
44.3dB