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subterra

Geotechnical engineer operating excavator during geotechnical site investigation near Christchurch, Canterbury.

Subterra are experts in the field of geotechnical engineering. Our experienced geotechnical consultants and engineers provide advice at the first stages of commercial and residential land developments.

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Hazard Analysis

Qualitative and quantitative hazard analysis offering slope stability assessment, liquefaction assessment, and rockfall risk.

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Construction Monitoring

Construction monitoring ensures successful execution of geotechnical and structural designs during building projects. Our services include foundation inspection, deep foundations geotech analysis and site supervision.

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Design

Geotechnical design includes the design of foundations, retaining walls and other ground improvement solutions.

  • Geotechnical construction monitoring and ground investigation for residential hillside project in Cashmere.
  • Geotechnical drilling and deep foundations geotech work on residential site in Rolleston, Canterbury.
  • Geotechnical testing and soil analysis performed by geotech engineers Christchurch during site investigation.
  • Engineering geologist supervising foundation inspection and pile installation for new build in Lincoln.
  • Construction monitoring and site supervision by geotechnical consultant in Halswell, Canterbury.

About Us

Established in 2020, Subterra has been involved in geotechnical engineering consulting across New Zealand ever since. We provide geotechnical services in Christchurch and the greater Canterbury area, as well as frequently servicing the West Coast and Nelson areas.

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Fast Turnaround Times

Competitive Pricing

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Good Communication

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On-Site And Desktop Investigation

Subterra offers a range of geotechnical services including soil analysis. Through geotechnical site investigation and desktop investigation we can determine the composition and geotechnical properties of subsoil, as well as the hazards present at the site.

Using information from the subsoil investigation, we provide guidance about suitable foundations, ground improvement or hazard mitigation measures. This information may be required for your project, ensuring you comply with regulatory body standards.

Aerial view of geotechnical site investigation and foundation assessment by geotechnical company Christchurch.
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 Services

Geotechnical testing and soil analysis performed by geotech engineers Christchurch during site investigation.

Geotechnical Reports

A geotechnical report evaluates a site’s subsurface conditions to guide safe construction. Conducted by an engineering geologist, geotechnical investigation reports can be used to support a Resource Consent or Building Consent application.

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Slope stability assessment and subsoil investigation on property in Waimakariri District, Canterbury.

Environmental Assessment

Subterra provides soil testing, including Preliminary Site Investigations (PSI) and Detailed Site Investigations (DSI), to provide you with a detailed contaminated soil assessment. 

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Soil testing samples from geotechnical investigation for environmental site assessment in Wigram, Christchurch.

HAZARD ASSESSMENT

Subterra specialises in geotechnical engineering and land damage assessment. Our team of qualified engineering geologists conducts both qualitative and quantitative assessments of existing or potential land damage, and can provide remediation or mitigation options.

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Engineering geologist supervising foundation inspection and pile installation for new build in Lincoln.

Construction Monitoring

Construction monitoring is vital for residential projects, ensuring geotechnical and structural designs are implemented successfully. A geotechnical consultant will conduct a detailed site investigation to confirm foundation compliance with reports, consented plans, and the NZ Building Code.

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  • Liz Keys, Bluff

    I had a fast and dirty job that required a geotechnical report on a residential section in Bluff. Anything to Bluff is an extra hassle for most companies, so I was pleased to hear from Subterra with a reasonable quote for travel, survey and reporting. Harry was able to fit me into his schedule, did a thorough job and produced the required geotechnical report within a week's turnaround. This met my due diligence requirement prior to purchase and council requirements. It was a pleasure to meet a young professional doing what he trained to do and provide services to a novice in homeownership and building. I can recommend Subterra for geotech services that are prompt, accurate, professional and affordable

  • Kerry Oberholzer - Sales Manager, Holloway Builders

    Holloway Builders has worked with Harry Greenfield from Subterra since 2021. We are very happy with the services that Harry at Subterra offers us. Great communication and very efficient. A highlight with this great working relationship is when a commitment is made it is met! We look forward to working with Harry in the future and have also recommended him to others.

  • James Gale - Director, Quadrant Surveyors

    I highly recommend Harry Greenfield of Subterra – we’ve involved Harry on a number of projects and have received nothing but positive feedback as a result of his works/tasks completed.

  • Rebecca Whitehouse - HR Manager, Whitehouse Builders

    I have used Subterra for my personal geotech needs and also our clients at work. I will continue to use Subterra in the future as Harry goes the extra miles for his clients and I can trust him to do a great job for all involved!

  • Tim Anderson, Cashmere

    Thanks again for undertaking this report so promptly.
    Your work on site and the report preparation is simply fantastic. 
    Well done and all the best for your business.