KT2: 0.0 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in KT2, KT2 5BS, stands 0.0 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, KT2 7HY, stands 48 m above it.
- Ground at eight in ten of its postcodes: between 7.8 m and 47 m, measured from Ordnance Datum; the middle one stands at 9.3 m.
- 14 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
- Mostly in Kingston upon Thames; partly in Richmond upon Thames.