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Cook Costello is a New Zealand multidisciplinary engineering consultancy working across geotechnical, civil and structural engineering, geophysics, land surveying, land development and property damage assessment. Founded in 1976, we have spent nearly 50 years helping clients investigate, design, consent and build projects across New Zealand, from early feasibility and site investigation through to design, construction monitoring and sign-off. Our team of engineers, surveyors, scientists, designers, technicians and support staff works from four offices in Whangārei, Auckland, Wellington and Christchurch. We support projects ranging from subdivisions and infrastructure to commercial buildings, natural-hazard recovery and complex ground engineering. What sets Cook Costello apart is the range of expertise within one team. Our geotechnical, civil, structural, surveying and geophysics specialists work alongside our in-house testing capability, so the various parts of a project that depend on each other are considered together rather than handed between separate firms. We are known for taking on difficult work in challenging conditions, and for an evidence-led approach to engineering: investigating the conditions on site, measuring what matters, and giving clear advice that helps clients make better decisions earlier. We are always interested in hearing from talented people who want to join the team. Get in touch or view our current opportunities.

Cook Costello Questions

The Cook Costello annual revenue was $21.7 million in 2026.

16 people are employed at Cook Costello.

Cook Costello is based in Whangarei, Northland.

The NAICS codes for Cook Costello are [541, 5413, 54133, 54].

The SIC codes for Cook Costello are [87, 871].

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