Site investigation — also called ground investigation or geotechnical investigation — characterises ground conditions before construction begins. It tells your structural engineer what the soil can carry, how deep to take foundations, and what groundwater conditions to expect.
Types of Investigation
Phase 1 — Desk Study
Geological maps, aerial imagery reviewed before physical investigation.
Trial Pits
Shallow excavations (1.5–4m) for direct soil inspection.
Geotechnical Boreholes
SPT testing, undisturbed soil sampling.
Laboratory Testing
CSIR-accredited analysis — particle size, Atterberg limits, compressive strength.
When Required
- Multi-storey buildings, hotels, commercial developments
- Road and highway construction
- Bridge foundations
- Dam and reservoir construction
- Bank and mortgage applications
Cost
Industry rate: from GH₵3,500
From GH₵2,000
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Frequently Asked Questions
How much does site investigation cost?
Depends on boreholes/trial pits needed, depth and lab testing scope. WhatsApp for a same-day quote.
Is it required by law?
Ghana Building Code requires geotechnical data for foundation design. Banks increasingly require reports before approving finance.