What it involves
A geotechnical site investigation is the systematic subsurface assessment that tells you what a site can actually support before you commit to a design: soil profile, groundwater conditions and foundation recommendations, compiled to AS 1726–2017. It's the standard first step for new buildings, roads, utilities, car parks and feasibility studies across Melbourne, regional Victoria and the Greater Brisbane area, and the report our engineers produce feeds directly into your structural or civil design.
Applications
- New buildings & foundations
- Roads, utilities & car parks
- Feasibility & pre-design
- Groundwater evaluation
What you receive
- Soil profile analysis
- Groundwater assessment
- Design recommendations
Method & standard
Track-mounted drill rigs + lab testing, fully compliant with AS 1726. Carried out to AS 1726 – 2017 by Probegeo's MIEAust-certified engineers.
Where we provide this service
Geotechnical Site Investigation is available across the Greater Melbourne area and regional Victoria, plus the Greater Brisbane area as a mobile, BPEQ-registered operation.
- Melbourne & regional Victoria
- Brisbane & South East Queensland
Common questions
What's included in a geotechnical site investigation?
Track-mounted drill rig fieldwork plus laboratory testing, delivered as a full AS 1726-compliant report covering soil profile analysis, groundwater assessment and design recommendations for your engineer or builder.
How long does a site investigation take?
Reports are typically delivered within 48 hours of fieldwork, from $550 depending on site size and access.
Do I need a site investigation for a small development?
Most councils and building surveyors require geotechnical input for new buildings, extensions and subdivisions — even smaller residential projects. It's far cheaper to investigate upfront than to redesign foundations after a slab has cracked.