Trial holes are a vital part of assessing ground conditions and foundation stability. Even small issues underground can develop into serious structural problems if ignored. That’s why we provide expert trial pit investigations across London, giving you accurate insights to protect your property and ensure long-term stability.

Ground investigation

Our trial pits provide a clear view of soil composition, depth of foundations, and potential ground movement risks. This essential step ensures accurate assessment before any construction, extension, or structural repair work begins.

Foundation assessment

By exposing the base of your property, we evaluate foundation depth, condition, and strength. This allows us to identify any issues early and recommend the most effective solutions for long-term stability.

Drainage & service checks

Trial pits reveal the position of underground services, drainage systems, and water tables. This prevents costly damage during construction or repairs and ensures all work is carried out safely and efficiently.

Compliance & reporting

We provide detailed reports and photographic evidence from every trial pit investigation. These records meet regulatory standards and give you the documentation needed for planning, building control, or structural engineering assessments.

Knowing when you need a trial pit investigation can save you from bigger issues later. Common reasons to carry out trial pits include:

• Planning an extension – Trial pits show foundation depth and soil type, ensuring your new structure is built on solid ground.
• Structural movement – If cracks, sloping floors, or subsidence appear, trial pits help uncover what’s happening below the surface.
• Drainage or water concerns – Trial pits reveal issues with groundwater, drainage systems, or leaking pipes that may be affecting your foundation.
• Engineering or compliance needs – Trial pits provide clear evidence for building control, planning applications, or structural engineer assessments.

If any of these apply to your property, arranging a professional trial pit investigation will give you accurate answers and peace of mind.

Why trial pits matter in London

London’s mix of clay-heavy soils, historic buildings, and dense infrastructure makes trial pits especially important. They reveal how deep foundations run, the type of soil supporting your property, and whether nearby drainage or utilities could pose risks.

Carrying out a trial pit investigation before construction or repairs helps avoid surprises, ensures stability, and gives engineers the information they need to recommend the right solutions.

Risks of skipping trial pit investigations

Without a trial pit, critical details about soil conditions, foundation depth, or hidden underground services may be missed. This can lead to costly delays, unexpected structural problems, or even safety hazards during building work.

Trial pits provide the clarity needed to plan with confidence. Skipping them puts your property, your budget, and future stability at unnecessary risk.