Flat C, 3 Harmsworth Street, London, SE17 3TJ
About Flat C
Flat C is a one-bedroom mid-terrace house in London (SE17 3TJ). It has a recorded floor area of 67 m² (around 721 sq ft) and construction records dating it to 1900-1929. The latest certificate (October 2021) shows a D (score 61), on the cusp of jumping into the C band. Earlier certificates rated it C (January 2011); the latest reading is one band lower. Between certificates, lighting went from Average to Very Good; while wall efficiency dropped from Good to Poor and roof efficiency dropped from Poor to Very Poor. The recommended improvements would push it to C (score 77).
At 67 m² it sits well below the postcode median (102 m² across 6 EPCs), making it one of the more compact homes locally. Today's modelled estimate of £531,000 is 39.7% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£527/sq ft) was about 20.7% below the postcode norm. 12 years since the last transfer (February 2014).
Know exactly what you're buying at Flat C
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms1
- Bathrooms1
- CloakroomYes
- EnsuiteYes
Outside
- ParkingYes
Building
- RefurbishedYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
More low energy lighting installed
Planning history
Flat C has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
Flat C valuation sits well clear of the typical sold price in this postcode.
£531,000
Modelled from EPC, postcode comparables.
£380,000
Recorded with HM Land Registry.
Sales timeline
28 February 2014Most recent
£380,000
Median price across the last 5 sales in SE17 3TJ: £1,200,000 (2021–2020).
Nearby sales in SE17 3TJ
4 Harmsworth Street, Southwark, London, SE17 3TJ
Sold Nov 2021
£1,262,4505 Harmsworth Street, Southwark, London, SE17 3TJ
Sold Sept 2020
£1,233,500Flat B, 3 Harmsworth Street, London, SE17 3TJ
Sold May 2020
£425,0007 Harmsworth Street, Southwark, London, SE17 3TJ
Sold Mar 2020
£1,200,000Flat B, 2 Harmsworth Street, London, SE17 3TJ
Sold Feb 2020
£680,000
Everything we know about Flat C, 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 Harmsworth Street homes
Floor Area for Flat C runs comfortably ahead of the street norm.
EPC Rating
61 (D)
Street avg 70 (C)
Floor Area
67 m²
Street avg 51 m²
CO₂ Emissions
3.2 t/year
Street avg 1.8 t/year
Habitable Rooms
3 rooms
Street avg 2 rooms
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
19/mo
Rising year-on-year across the wider district.
Nearest stop
0.3 km
Kennington Road Kennington — bus stop.
Closest school
0.2 km
Keyworth Primary School. 97 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
56.8dB

Night-time· 23:00 – 07:00
47.1dB