Flood risk across Richmond upon Thames
Richmond is the only London borough on both banks of the Thames, and Teddington Lock marks where the river stops being tidal. Riverside roads in Richmond, Twickenham and Mortlake flood on the highest spring tides, and the Crane and Beverley Brook add river flood risk. Surface water affects streets across the borough.
Flood zones only show river and sea flooding, and they ignore flood defences. Surface water and reservoir risk aren’t part of the zones – check them on the Environment Agency’s long-term flood risk service, or get the full report, which covers every source.
Rivers that shape local flood risk
Main rivers are managed by the Environment Agency. Smaller watercourses and drainage are the responsibility of London Borough of Richmond upon Thames and landowners.
River Thames – Tidal below Teddington Lock; non-tidal above
River Crane – Twickenham and Whitton
Beverley Brook – Richmond Park, Barnes and the Kingston border
Duke of Northumberland's River – Isleworth and Twickenham
Who manages flood risk here
London Borough of Richmond upon Thames is the Lead Local Flood Authority, responsible for surface water, groundwater and ordinary watercourses. The Environment Agency manages main rivers and the sea, and issues flood warnings. The same council also decides planning applications – and asks for a flood risk assessment in Flood Zones 2 and 3.
Getting a written answer for an address
The free check describes the area around your postcode. For a specific property, the full report checks your exact address against every flood dataset and gives you a dated PDF to share with your surveyor, conveyancer or insurer.
For planning decisions, your local council has the final say.
