Geotechnical engineering and contaminated land specialists
Auckland | Hamilton | Nelson | New Plymouth
At HD Geo, we specialise in geotechnical engineering and contaminated land management across New Zealand. From ground investigations and foundation design to HAIL assessments and contaminated site remediation, our team of chartered engineers and environmental specialists provides smart, practical solutions that keep your projects moving.
With offices in Auckland, Hamilton, Nelson and New Plymouth, we understand local ground conditions, council processes and regulatory requirements and apply that knowledge to every project we take on, large or small.
Why Choose HD Geo
We are a specialist consultancy. Not a large corporate. You get direct access to senior engineers on every project, faster turnaround times, and advice genuinely tailored to your site.
Choosing HD Geo means choosing a partner who puts you first. We take the time to understand your objectives, communicate clearly at every step, and deliver results you can rely on. Our approach is simple: smart, thoughtful engineering paired with genuine care for people and outcomes. With HD Geo, you gain a team that’s committed to supporting your vision, reducing uncertainty, and ensuring your project stands on solid, safe ground.
What we offer
Find out more about our capabilities on our services pages for geotechnical engineering and contaminated land services.
Trusted by our clients
“I have had the pleasure of HD Geo working for me over a number of projects, they were very proactive in helping work through issues we were experiencing with ground contamination and established a very robust management plan enabling great success over our projects and reputation with our clients. “
“Their clear advice, strong understanding of local ground conditions, and respectful approach on a culturally significant site made them a trusted consultant. We highly recommend HD Geo for geotechnical services in Taranaki. “
“We engaged their services for remedial work required to a retaining wall and were extremely impressed from the outset. Through the entire process we were kept informed, provided with pragmatic solutions and as a result we solved what was quite a complex situation. We cannot thank them enough for the technical knowledge and customer service provided. Thanks HD Geo! “
“I work with HD Geo on a regular basis, mainly using their geotechnical and contamination specialists for land development projects. They are a good bunch of people who deliver excellent work. They are at the top of their game! “
“We engaged HD Geo for the preparation of a geotechnical feasibility report to support a categorisation review in reference to the Auckland Anniversary Day storm event.
The site comprising a 22-metre cliff was complex and involved a retreating cliff line and complex bedding stratum.
HD Geo projected confidence and certainty in delivering a report of high quality to meet the feasibility requirements. I have been in construction for over 46 years often involving various geotechnical challenges and rarely have I issued a five-star review as I have for HD Geo. “
“We have been working with Paul, James and the team at HD-Geo for a number of years on multiple different projects. The team at HD-Geo are a vital part of our respective project teams and collaborate well with the other Project Team disciplines, always reliable, efficient, and timely.”
“Working with HDGeo has been a great experience for Powerco. Their expertise in geospatial solutions and commitment to innovation have helped us plan and deliver several complex projects across the wider Taranaki region. HDGeo’s team consistently demonstrates professionalism, technical excellence, and a collaborative approach that makes complex projects run smoothly. Their ability to provide accurate, actionable insights has added real value to our operations, and we look forward to continuing this strong partnership.”
“Architect People have worked with HDGeo across multiple projects, often involving complex earthworks scenarios and discoveries during construction. James, Paul and the team have been collaborative, responsive and pragmatic in their approach, giving us the confidence any problem can be tackled, significantly de-risking a project. We would not hesitate recommending HDGeo for Geotechnical and environmental engineering.”
“I have found HD Geo easy to work with, responsive, and willing to come to site when needed. They understand that on-site discussions often add more value than extended email correspondence. I would readily recommend HD Geo as a capable and reliable geotechnical engineering partner for complex earthworks and development projects.”
Recent Work
Wairere Falls
Waiatarua, Auckland
