517a, First Floor Flat, Finchley Road, London, NW3 7BB
About 517a
517a is a mid-terrace house in London (NW3 7BB). It has a recorded floor area of 42 m² (around 452 sq ft) and construction records dating it to 1900-1929. At 42 m² this is the smallest unit on EPC record across 517a (42–56 m²). The building's EPC ratings span E to D, with this unit at the bottom. The latest certificate (December 2018) shows an E (score 54), well below the UK norm with real room to improve. Earlier certificates rated it D (November 2008); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Average; while main heating dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 73), a 2-band jump. Main heating runs on electricity.
At 42 m² it's 19.2% smaller than the typical home in the postcode (52 m² median across 29 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs).
Know exactly what you're buying at 517a
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Upgraded to gas central heating
Switched from oil to mains gas, reducing emissions and costs
Heating controls changed
Hot water system upgraded
Single glazing replaced with double or better glazing
Heating system changed
Changed to a more efficient fuel source
Heating controls changed
Hot water system changed
Planning history
517a has no planning applications on record.
Notable planning nearby
5applications of note in the surrounding area
We flagged 1 thing worth checking at 517a
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
517a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£437,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in NW3 7BB: £500,000 (2024–2011).
Nearby sales in NW3 7BB
Flat 8, 525 Finchley Road, London, NW3 7BB
Sold Sept 2024
£395,000Flat 6, 525 Finchley Road, London, NW3 7BB
Sold Jun 2021
£500,000Flat 9, 525 Finchley Road, London, NW3 7BB
Sold Jun 2017
£700,000519b, Finchley Road, Camden, London, NW3 7BB
Sold Jun 2015
£880,000Flat 2, 525 Finchley Road, London, NW3 7BB
Sold Oct 2011
£344,000
Everything we know about 517a, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Finchley Road homes
On epc rating, 517a runs well behind the street norm.
EPC Rating
54 (E)
Street avg 64 (D)
Floor Area
42 m²
Street avg 57 m²
CO₂ Emissions
2.5 t/year
Street avg 2.7 t/year
Habitable Rooms
4 rooms
Street avg 3 rooms
Similar properties nearby
509a, Flat 2, Finchley Road
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509a, Flat 1, Finchley Road
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509a, Flat 3, Finchley Road
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1a, Third Floor Flat, The Village, North End Way, Camden
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515a, Flat 1, Finchley Road, Camden
NW3 7BB
515a, Flat 3, Finchley Road, Camden
NW3 7BB
515a, Flat 2, Finchley Road, Camden
NW3 7BB
515a, Flat 4, Finchley Road, Camden
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
6/mo
Rising year-on-year across the wider district.
Nearest stop
0.0 km
Lyncroft Gardens NW6 — bus stop.
Closest school
0.3 km
Emmanuel Church of England 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
53.3dB

Night-time· 23:00 – 07:00
43.0dB