Geotechnical Engineering Services

Auckland | Hamilton | Nelson | New Plymouth

HD Geo provides geotechnical engineering services for residential, commercial, infrastructure and network projects across New Zealand. 

Our team includes Chartered Professional Engineers (CPEng), Engineering Geologists and NZTA-accredited practitioners. We work on projects of all sizes — from small residential sites needing a geotechnical report for building consent, to large infrastructure projects with complex ground conditions and staged construction. 

Our Geotechnical Service Includes:

Ground Investigation & Site Assessment: We investigate soil and rock conditions using trial pitting, CPT testing, borehole drilling and dynamic cone penetrometer testing. Early investigation reduces risk and cost. 

Foundation Design: We design shallow and deep foundations — including pile design, raft foundations and ground improvement — tailored to your site's specific conditions. 

Slope Stability Analysis: We assess existing slopes and proposed earthworks using industry-standard stability modelling software. We also design landslide remediation and erosion protection. 

Retaining Wall Design: We design gravity walls, cantilevered walls, anchored walls and reinforced soil walls. All designs comply with NZ standards and account for seismic loading and drainage. 

Seismic & Liquefaction Assessment: We evaluate seismic hazard and liquefaction risk for buildings and infrastructure in accordance with current NZ standards and guidelines.

Our Team Holds:

  • Chartered Professional Engineer (CPEng)

  • Professional Engineering Geologist (PEngGeol)

  • NZTA ARL accreditation

  • NZTA Road Inspectors Certificate.

  • CAA Part 102 certified for Drones

These credentials mean your reports, designs and certifications are accepted by Auckland Council, Waikato District Council, NZTA and all other territorial and regional authorities. 

Geohazard Assessments: We map landslide and rockfall hazards, carry out engineering geological assessments, and evaluate risk for development sites, infrastructure corridors and natural hazard overlays. 

Construction Monitoring & PS4 Certification: We observe construction, carry out compaction testing and provide PS4 geotechnical certification for building platforms and earthworks. 

Geotechnical Peer Review (PS2): We provide independent geotechnical peer review of designs and reports for councils, developers and project teams. 

Temporary Works: We design sheet piling, thrust blocks, piling platforms and provide geotechnical input for trenchless technologies such as directional drilling. 

Need a geotechnical engineer for your project?

Talk to the HD Geo team today to discuss your requirements or request a quote.

Call 0800 080 088 or email queries@hdgeo.co.nz, and one of our geotechnical engineers will be happy to help. With offices in Auckland, Hamilton, and New Plymouth, we support projects across New Zealand.