Foundation Design and Retaining Walls

Good foundations suit the ground they sit on. Clay near trees, made ground, slopes and changing levels all need a design that accounts for them. We design foundations and retaining walls that are safe, buildable and sized for the actual site conditions.

Foundations we design

  • Traditional strip and trench fill foundations

  • Deepened foundations near trees on clay soils

  • Reinforced concrete rafts and ground beams

  • Piled foundation schemes

  • Underpinning to existing buildings

Retaining walls

Whether you're levelling a sloping garden, cutting in a driveway or digging out a lower ground floor, retaining walls must resist the soil and water pressure behind them for the life of the structure. We design reinforced concrete and masonry retaining walls, specify gabion basket and pre-cast concrete retaining wall systems, and plan the temporary works sequence to build them safely next to existing buildings.

Recent project

Lower ground floor extension, Matlock

Frequently asked questions

Does a garden retaining wall need an engineer?
If it holds back more than a small height of soil, or sits near a building, path or road, it should be designed by an engineer.

Can you design foundations near trees?
Yes. We size foundation depths to the soil type and the trees nearby, following NHBC guidance.

Do you design basements and lower ground floors?
Yes, including the underpinning and retaining walls needed to lower the ground safely beside an existing house.

Got a sloping site or tricky ground? Call 07808 047874 or email jon@jglstructuraldesigns.com.

Reinforced concrete retaining walls for a lower ground floor, Matlock