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Get startedFlat 3 is a one-bedroom semi-detached house in London (SW17 8HN). It has a recorded floor area of 40 m² (around 431 sq ft), construction records dating it to 1900-1929 and council tax band B. At 40 m² this is the smallest unit on EPC record across the building (40–74 m²). The building's EPC ratings span D to C, with this unit at the top. Other recorded features include a balcony. Period features are noted in the property record. The latest certificate (April 2020) shows a C (score 71). Earlier certificates rated it B (October 2009); the latest reading is one band lower. Between certificates, lighting went from Average to Very Good; while wall efficiency dropped from Good to Very Poor and hot-water efficiency dropped from Very Good to Good.
Sale prices here have outpaced London HPI: 11.1% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£859/sq ft) was about 120.1% above the typical sold price in the postcode. At 40 m² it sits well below the postcode median (62 m² across 59 EPCs), making it one of the more compact homes locally. Last changed hands 11 years ago, in April 2015. Across the public record there are 5 sales, relatively high churn for a single property.
Flat 3's carbon output is low for the local stock.
Price for Flat 3 has grown more than fourfold since the 1999 starting point.
£401,000
Modelled from EPC, postcode comparables and a sale-price growth of 11.1% per year over 16 years.
£370,000
Growth on file: 11.1% per year over 16 years.
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Detailed AI analysis
Flat 3 outperforms the street on price per m² by a wide margin.
Price per m²
£9,250
Street avg £5,866
Floor Area
40 m²
Street avg 60 m²
Habitable Rooms
2 rooms
Rail-style transport is unusually close for this postcode.
Crime
8/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Church Lane / Lessingham Avenue — bus stop.

Daytime· 07:00 – 23:00
53.6dB

Changes detected from historical EPC data
Hot water efficiency decreased
Glazing upgraded to newer, more efficient type
Low energy lighting percentage decreased
Heating controls upgraded for better temperature management
Windows upgraded, improving insulation
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
30 April 2015Most recent
£370,000
+59.1%over 4 years6 September 2010
£232,500
+25.7%over 5 years1 September 2005
£185,000
+14.2%over 1 year9 July 2004
£162,000
+123.4%over 4 years22 October 1999
£72,500
Median price across the last 5 sales in SW17 8HN: £1,085,000 (2024–2023).
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Street avg 3 rooms
CO₂ Emissions
1.5 t/year
Street avg 2.7 t/year
SW17 8LU
Closest school
0.3 km
Franciscan Primary School. 61 schools nearby.
Night-time· 23:00 – 07:00
42.8dB