Groundworks in Redhill
Technical groundworks and piling for RH1. We specialize in the unique Greensand and Fuller's Earth soil conditions found around Redhill Common and Earlswood.
Engineered for Redhill
Redhill presents unique challenges: steep slopes near the Common and sandy, unstable soil bands. We have the specific retaining wall and piling expertise to build safely here.
The Lower Greensand & Fuller's Earth
Redhill sits primarily on the Lower Greensand Group (Folkestone Beds), which offers good drainage but can be loose and prone to collapse in deep trenches. More critically, the area contains bands of Fuller's Earth (montmorillonite clay).
This specific clay is highly expansive and historically mined in the area. Building over old workings or active clay bands requires rigorous soil testing and often deep piling to bypass unstable layers.
For properties on the slopes of Redhill Common or near St John's, we construct heavy-duty reinforced concrete retaining walls (King Post or Contiguous Piling) to prevent landslip.
Where Fuller's Earth is present, strip foundations risk subsidence. We utilize CFA piling to transfer loads to stable bedrock, bypassing the shifting clay layers.
Redhill Brook & Runoff
While the sandy soil drains well, Redhill's topography directs significant surface water toward the town center and the Redhill Brook. Properties at the base of hills (e.g., near the station or Earlswood) face high hydrostatic pressure.
Perimeter Drainage
We install French drains and perimeter drainage channels on the uphill side of properties to intercept runoff before it reaches your foundations.
Basement Pumps
For basements in lower Redhill, we install dual-pump sump systems with battery backup, essential for managing rapid water table rises from the Brook.
Sewer Connections
We are approved contractors for street works, capable of connecting new builds to the main sewer lines under the busy A23/A25 junctions.
Planning Resources
Reigate & Banstead
Submit planning applications and check building control regulations for RH1.
Visit Portal →Flood Risk Map
Check the long-term flood risk for Redhill Brook and surface water runoff.
Check Postcode →Thames Water
Developer services for build-over agreements and sewer connections.
Developer Services →