Drainage Services in Harrow

Harrow developed rapidly through the inter-war period as the Metropolitan Railway extended into Middlesex, and much of the borough's housing, in Pinner, Rayners Lane and North Harrow, sits on 1920s and 30s clay pipe drainage laid to a fairly consistent standard for the time. The underlying London Clay causes gradual seasonal ground movement that, combined with mature street tree planting from the same era, is a common cause of root ingress and joint displacement in these older pipe runs.

Harrow on the Hill, occupying higher ground, generally has better natural drainage, while lower-lying Wealdstone and Kenton can see slower surface water clearance after heavy rain given the flatter terrain and older combined sewer sections in places. Stanmore, at the edge of the borough, includes a mix of housing ages with generally reliable separated drainage in more recent developments.

For Harrow properties we begin with a CCTV drain survey to assess the condition of what is, across much of the borough, now century-old clay pipework. High-pressure jetting clears the root ingress and silt blockages typical of these mature suburban streets, and no-dig lining allows repairs beneath established gardens and driveways without disturbing the borough's characteristic inter-war streetscapes.