DA14: 12 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in DA14, DA14 5ET, stands 12 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, DA14 6AX, stands 77 m above it.
- Ground at eight in ten of its postcodes: between 27 m and 65 m, measured from Ordnance Datum; the middle one stands at 47 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Bexley; partly in Bromley.