With 140 years of accrued mana, our survey team is among the most respected in Aotearoa New Zealand. We thrive on challenges and are dedicated to adding value to your projects. Our commitment to delivering high-quality results, clear communication style and our passion for surveying ensure we’re upholding the Harrison Grierson legacy. It’s central to our approach in everything we do.

Talk to us for advice on the best approach for your next project. What we can do for you:

Capturing reality

Let us help you to leverage the benefits of capturing reality in 3d and full colour to supercharge collaboration and speed up the design process.

Lidar and photogrammetry

Our fleet of specialist UAVs (Unmanned Aerial Vehicles aka drones) come equipped with high-definition cameras, thermal sensors, and LiDAR—enabling fast, safe, and accurate data capture from above.

We deliver high-resolution aerial imagery, terrain models, and 3D point clouds to support planning, design, and monitoring across a wide range of projects.

From large-scale infrastructure corridors to remote or hazardous terrain, our aerial surveys provide rapid coverage and exceptional detail, without disrupting site operations. Whether you need volumetric analysis, vegetation mapping, or construction progress tracking, we tailor each flight to your project’s needs. All outputs are processed in-house and can be delivered in formats ready for CAD, GIS, or BIM workflows. For seamless collaboration, we also offer cloud-based access to visualisations and data through an online platform.

360° photography

Our 360° photography captures immersive, high-resolution imagery that brings your site to life—perfect for stakeholder engagement, remote inspections, and visual documentation.

We create seamless, navigable panoramas that allow users to explore environments as if they were on site. Whether it’s a construction zone, industrial facility, or public space, we capture every angle with clarity and context.

Our imagery is georeferenced and can be linked to plans, models, or asset data for powerful visual integration. Accessed online in your browser, our 360° content is easy to access and share—no specialist software or training required. It’s a smart, scalable way to enhance collaboration, reduce site visits, and keep everyone aligned.

Surveying in high definition

When you need highly detailed and accurate spatial data, we capture everything and deliver it in a visually stunning, ready-to-use package.

High-definition laser scanning

We deploy the latest in high-definition, survey-accurate 3D laser scanning technologies to capture detailed spatial data for buildings, infrastructure, and complex environments. Our specialist scanning methods deliver rich, survey-accurate 3D point clouds and models in full colour ready to go so as to support planning, design, and construction workflows with speed and confidence. We specialise in scanning buildings, infrastructure, and complex environments quickly and with minimal disruption to live operations. Our team works seamlessly outdoors, indoors, and in confined spaces—capturing precise data even in challenging, high-traffic or hard-to-reach areas.

3D modelling

We go beyond point clouds to deliver intelligent 3D models, digital twins, and photorealistic visualisations that integrate directly with industry-standard design platforms such as Revit and Civil 3D. It means our data is ready to speed up the design process. Our deliverables are more than just data—they’re practical tools for designers, engineers, project managers, and stakeholders. Whether it’s a fully registered point cloud, a clash-detection-ready BIM model, or an immersive fly-through of a site, we provide outputs that are accurate, accessible, and tailored to your project needs. Everything is hosted online on a web-based platform, providing access to the models and visualisations for those without specialist software or technical knowledge. It creates opportunities for seamless collaboration, enabling clear communication between technical and non-technical teams, no matter where they are.

Confined, restricted or inaccessible spaces

We access the places others can’t—capturing critical data in tight, hazardous, or GPS-denied environments without putting people at risk.

Unlock the inaccessible

We specialise in capturing data where others can’t go. Our advanced indoor drone technology allows us to safely access confined, hazardous, or GPS-denied environments—like tanks, tunnels, culverts, and industrial plants—without putting people at risk. Equipped with collision-tolerant sensors and onboard LiDAR, it navigates tight, dark, and complex spaces with ease, delivering high-resolution 3D models and visual inspections. This capability is unique in New Zealand, giving our clients access to critical information that would otherwise be impossible or prohibitively expensive to obtain.

Safe, rapid, remote access

Our confined-space drone inspections offer a safer, faster alternative to traditional methods—no scaffolding, shutdowns, or confined space entry required. We can inspect live environments like processing plants, stormwater networks, and structural voids with minimal disruption. But the value goes beyond routine inspections: in emergency scenarios such as collapsed buildings, blocked pipes, or unstable structures, we can deploy rapidly to assess conditions without endangering personnel. The drone’s onboard LiDAR, video, and thermal sensors deliver detailed outputs for decision-making in real time. As the only team in New Zealand currently operating this level of indoor drone technology, we’re setting a new standard for safety, speed, and spatial intelligence.

Construction - nailed it

From set-out to as-built and monitoring, we deliver precise, on-time construction surveying that keeps your project moving and reduces risk.

As-built

You build it right, we prove it. We deliver precise as-built surveys that verify construction against design, capturing what’s actually been built, not just what was planned. Whether it’s for compliance, certification, or project handover, our surveys provide clear, accurate records of structures, services, and site features. We tailor outputs to your needs, from 2D plans to 3D models, ensuring seamless integration with your design and asset management systems.

Setout

When it has to be right, it has to be right.

We set out critical design data on site with precision and care, ensuring what’s built matches what’s designed. We manage design updates to help avoid costly errors and rework, making sure the latest revisions are always in play. Our team can work alongside in-house construction surveyors, focusing on high-risk or technically demanding elements while supporting efficient, cost-effective delivery for the rest of the site.

Monitoring

Precision you can trust. We provide accurate, real-time monitoring of ground and structural movement to protect your project and manage risk. Whether it’s a major infrastructure build, a sensitive heritage site, or a high-density urban development, we track settlement with precision and clarity. Our monitoring solutions are tailored to your site and can include automated sensors, manual observations, and detailed reporting, giving you the confidence to act early, stay compliant, and keep your project on track.

Setting boundaries

We define boundaries and property rights with precision, so you can develop, build, and invest with confidence.

Subdivide & conquer

Whether you’re creating a new residential, commercial or industrial development or a complex unit title scheme, we provide end-to-end surveying services to support your subdivision. From initial feasibility through to final title, we manage the process with precision and clarity, ensuring compliance with planning rules, legal requirements, and LINZ standards. Our team has decades of experience delivering fee simple and unit title subdivisions, including some of the most technically and legally complex projects in NZ. We work closely with planners, lawyers, LINZ and councils to streamline approvals and avoid costly delays, resulting in clear boundaries, clean titles, and a smooth path to market.

Defining your rights

We specialise in defining, protecting, and clarifying land and property rights. With over 140 years of experience, our team has been trusted to resolve some of the most challenging legal survey issues in NZ. Boundary redefinition, legalisation surveys, removal of limitations, or the creation of easements and covenants; we bring unmatched expertise to every job. We understand the legal frameworks, the risks, and the importance of getting it right. Our work gives landowners, developers, and public agencies the confidence to move forward, knowing their rights are clearly defined and legally secure.

When every square metre counts

In commercial property, square metres mean money, and clarity means confidence.

We deliver precise, regulation-aligned rentable area surveys and lease plans that support fair, transparent agreements between landlords and tenants. Whether it’s a boutique tenancy or a sprawling multi-level complex, our outputs are fast, reliable, and dispute-resistant. Prepared to the latest PCNZ standards, our surveys are trusted by property managers, legal advisors, and institutional investors alike. With deep domain knowledge and a reputation for accuracy, we help you protect value, reduce risk, and build trust—one square metre at a time.