21c is a mid-terrace house in London (SW8 1AS). It has a recorded floor area of 56 m² (around 603 sq ft) and construction records dating it to 1930-1949. At 56 m² this is the 15th smallest of 23 units on EPC record in the building, where floor areas span 39–103 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (September 2024) shows a C (score 77), near the top of the C band. When first surveyed in November 2013 the rating was D, the property has climbed 1 band since. Between certificates, window efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good. The recommended improvements would push it to B (score 82).
Untraded for 18 years, with the last transfer in June 2008. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Sale prices here have outpaced London HPI: 8.1% per year against 0% for the wider region. Today's modelled estimate of £545,000 sits 61% above the 2008 sale of £338,500. On a £-per-square-foot basis, the last sale (£562/sq ft) was about 24.3% above the typical sold price in the postcode.
21c's carbon output is low for the local stock.
No planning applications are recorded against 21c, Richborne Terrace, London, SW8 1AS. The full report also covers planning activity across the surrounding area.
Full planning data for 21c, Richborne Terrace, London, SW8 1AS
Every application and decision on this property and nearby, in full, in the report.
21c's estimated value is more than triple its earliest registered sale price (2000).
£545,000
Modelled from EPC, postcode comparables and a sale-price growth of 8.1% per year over 8 years.
£338,500
Growth on file: 8.1% per year over 8 years.
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EPC Rating for 21c runs comfortably ahead of the street norm.
Price per m²
£6,045
Street avg £7,923
Floor Area
56 m²
Street avg 62 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
Rail-style transport is unusually close for this postcode.
Crime
12/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Dorset Road — bus stop.

Daytime· 07:00 – 23:00
57.8dB

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Changes detected from historical EPC data
More low energy lighting installed
Single glazing replaced with double or better glazing
27 June 2008Most recent
£338,500
+88.1%over 8 years26 May 2000
£180,000
Median price across the last 5 sales in SW8 1AS: £625,000 (2025–2024).
Detailed EPC data
Full energy ratings, history and recommendations
Full planning history
Every application and decision on record
Comparable sales data
Plus transport, crime, schools and air quality
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CO₂ Emissions
1.4 t/year
Street avg 2.2 t/year
Closest school
0.2 km
Reay Primary School. 98 schools nearby.
Night-time· 23:00 – 07:00
48.5dB