N4: 8.4 m clear of the highest tide in the London Bridge ledgers

N4 on the relief of London, with a tide staff: 8.4 m above the 1953 tide, the highest in the ledgers.

The lowest postcode in N4, N4 1NS, stands 8.4 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, N4 4ST, stands 64 m above it.

Ground at eight in ten of its postcodes: between 23 m and 42 m, measured from Ordnance Datum; the middle one stands at 33 m.
None lies in the Environment Agency's Flood Zone 3 from the sea.
Mostly in Haringey; partly in Hackney.

Open N4 on the map