20a, Blackheath Grove, Lewisham, London, SE3 0DQ
About 20a
20a is a one-bedroom semi-detached house in Lewisham, London, London (SE3 0DQ). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to 1900-1929 and council tax band C. Tenure is freehold. At 47 m² this is the smallest unit on EPC record across the building (47–233 m²). The building's EPC ratings span F to C, with this unit at the top. The home occupies a cul-de-sac position. The latest certificate (May 2020) shows a C (score 71). When first surveyed in July 2013 the rating was F, the property has climbed 3 bands since. Between certificates, window efficiency went from Very Poor to Poor, hot-water efficiency went from Very Poor to Good and main heating went from Very Poor to Good. The recommended improvements would push it to B (score 82).
On a £-per-square-foot basis, the last sale (£820/sq ft) was about 141.3% above the typical sold price in the postcode. At 47 m² it's 16.1% smaller than the typical home in the postcode (56 m² median across 45 EPCs). Sold August 2023 for £415,000.
Know exactly what you're buying at 20a
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms1
- Bathrooms1
- StudyYes
Outside
- Private gardenYes
- Cul-de-sacYes
Building
- TenureFreehold
- RefurbishedYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Upgraded to gas central heating
Hot water system upgraded
Single glazing replaced with double or better glazing
Heating controls upgraded for better temperature management
Planning history
20a has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
Sales history & valuation
20a valuation sits well clear of the typical sold price in this postcode.
£424,000
Modelled from EPC, postcode comparables and a sale-price growth of 0.4% per year over 9 years.
£415,000
Growth on file: 0.4% per year over 9 years.
Sales timeline
30 August 2023Most recent
£415,000
+3.8%over 8 years29 October 2014
£400,000
Median price across the last 5 sales in SE3 0DQ: £355,000 (2024–2020).
Nearby sales in SE3 0DQ
21 Blackheath Grove, Lewisham, London, SE3 0DQ
Sold Oct 2024
£355,00011 Blackheath Grove, Lewisham, London, SE3 0DQ
Sold Feb 2024
£1,470,00016 Blackheath Grove, Lewisham, London, SE3 0DQ
Sold Jul 2022
£652,00020d, Blackheath Grove, London, SE3 0DQ
Sold Mar 2022
£300,0006a, Blackheath Grove, Lewisham, London, SE3 0DQ
Sold Jun 2020
£325,000
Everything we know about 20a, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?
Versus other Blackheath Grove homes
20a outperforms the street on co₂ emissions by a wide margin.
Price per m²
£8,830
Street avg £5,189
Floor Area
47 m²
Street avg 66 m²
Habitable Rooms
2 rooms
Street avg 3 rooms
CO₂ Emissions
1.7 t/year
Street avg 3.2 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
10/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Blackheath Rail Station — railway station.
Closest school
0.4 km
John Ball Primary School. 59 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
51.0dB
Night-time· 23:00 – 07:00
41.6dB