509b, Green Lanes, Haringey, London, N4 1AN
About 509b
509b is a semi-detached house in Haringey, London, London (N4 1AN). It has a recorded floor area of 73 m² (around 786 sq ft) and construction records dating it to 2024. The latest certificate (December 2024) returns a B (score 83), comfortably above the UK average. When first surveyed in July 2022 the rating was E, the property has climbed 3 bands since. Between certificates, wall efficiency went from Very Poor to Very Good, lighting went from Very Poor to Good and main heating went from Good to Very Good. At 73 m² this is the 6th smallest of 7 units on EPC record in the building, where floor areas span 27–102 m². The building's EPC ratings span D to B, with this unit at the top. On EPC score it ranks first in the building (83 versus a worst of 59).
At 73 m² the property is well over the postcode median (46 m² across 12 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode.
Know exactly what you're buying at 509b
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
509b ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Cavity wall insulation installed
More low energy lighting installed
Planning history
509b has no planning applications on record.
Notable planning nearby
31applications of note in the surrounding area
We flagged 2 things worth checking at 509b
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.
- Signs of HMO activity in the area
- Larger development activity nearby
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Sales history & valuation
509b has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£514,000
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 3 sales in N4 1AN: £210,000 (2015–2002).
Everything we know about 509b, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area
- Larger development activity nearby
Versus other Green Lanes homes
EPC Rating for 509b runs comfortably ahead of the street norm.
EPC Rating
83 (B)
Street avg 65 (D)
Floor Area
73 m²
Street avg 50 m²
CO₂ Emissions
1.1 t/year
Street avg 2.2 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
15/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Mattison Road — bus stop.
Closest school
0.2 km
South Harringay Junior School. 81 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
52.5dB
Night-time· 23:00 – 07:00
43.4dB