A 12-storey residential block in Lagos Island begins to settle unevenly six months after handover. Cracks propagate through the ground-floor columns. The structural engineer checks the frame — it’s fine. The problem started below the surface, where fill material of variable compressibility was never properly characterised before construction began. This is geotechnical engineering failure at…

Walk onto any active site in Lekki, Asaba, or Karu today and you’ll notice something different from a decade ago. The borehole rig is still there, but so is a drone mapping the topsoil, a technician logging cone penetration data on a tablet, and a contractor asking about ground improvement instead of simply specifying a…