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Get started31c is a one-bedroom semi-detached house in London (SE20 8QJ). It has a recorded floor area of 48 m² (around 517 sq ft) and construction records dating it to before 1900. The latest certificate (September 2025) shows a D (score 67), on the cusp of jumping into the C band. When first surveyed in August 2012 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Average and lighting went from Very Poor to Good. The recommended improvements would push it to C (score 74). At 48 m² this is the 4th smallest of 9 units on EPC record in the building, where floor areas span 41–94 m². The building's EPC ratings span E to C across 9 units on file.
Held since August 2000 — that's 26 years off the open market, well above the local norm. Sale prices here have outpaced London HPI: 20% per year against 0% for the wider region. Today's modelled estimate of £285,000 sits 375% above the 2000 sale of £59,995. On a £-per-square-foot basis, the last sale (£116/sq ft) was about 47.4% below the postcode norm.
31c's modelled value sits at over four times its earliest registered sale price (1998).
£285,000
Modelled from EPC, postcode comparables and a sale-price growth of 20.0% per year over 2 years.
£59,995
Growth on file: 20.0% per year over 2 years.
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Price per m²
£1,250
Street avg £3,149
Floor Area
48 m²
Street avg 51 m²
Habitable Rooms
2 rooms
Street avg 2 rooms
Rail-style transport is unusually close for this postcode.
Crime
6/mo
Rising year-on-year across the wider district.
Nearest stop
0.3 km
High Street / Penge West Station — bus stop.

Daytime· 07:00 – 23:00
53.6dB

Changes detected from historical EPC data
Windows upgraded, improving insulation
Loft insulation installed or upgraded to 250mm+
More low energy lighting installed
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11 August 2000Most recent
£59,995
+42.8%over 1 year28 August 1998
£42,000
Median price across the last 5 sales in SE20 8QJ: £225,000 (2025–2020).
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CO₂ Emissions
1.9 t/year
Street avg 2.7 t/year
SE20 8NW
Closest school
0.1 km
Harris Primary Academy Crystal Palace. 58 schools nearby.
Night-time· 23:00 – 07:00
43.7dB