North Island


Established in 1984 on Auckland’s North Shore, our Takapuna office is the base for more than 50 engineers, geologists, and technicians who undertake work throughout the New Zealand and areas of the Pacific Basin, including Fiji, Samoa, and The Cook Islands.  We work closely with our South Island team to provide specialist engineering consultancy coverage wherever it may be required.
Geotechnical, civil, and water resource engineering services comprise core areas of expertise, and our teams work closely together to provide efficient and cost-effective solutions for our clients.


Geotechnical engineers and geologists have extensive experience, which includes foundation design, earthworks management, stability analysis, quarry and resource assessment, and contamination investigations.  A particular area of expertise is the provision of specialist advice and innovative design solutions for steep or otherwise difficult sites, often comprising diverse soil and rock types.

Projects include the rehabilitation of a cleanfill site for a residential subdivision in Redvale; a multi-storey car park construction over contaminated landfill in Takapuna, a South Auckland joint residential and Council sea wall rehabilitation; and groundwater extraction projects, in both New Zealand and Fiji .


Our specialist site contamination team provides a variety of services including site assessment; management, remediation, and validation reporting; preliminary and detailed site investigations (PSI/DSI); remedial action plans including council requirements for asbestos in soils; and site management plans. Clients include local government, large commercial operators, and private property owners.


We have a strong team of civil engineers, many of whom specialise in the design and implementation of infrastructure for land development, including sites with challenging geotechnical and stormwater disposal requirements.  Our experience of civil contracts, often under NZ 3910, involves design, contract administration, and supervision during construction for a variety of aspects such as pavements, retaining walls, and services reticulation. 
Current and recent projects include wide-ranging civil engineering services for eight retirement villages; a new bus depot facility on contaminated land in Mt Roskill; a new car park and roading network for Mitre 10 Mega, Warkworth; and investigation, assessment and redesign for more than 30 council stormwater outfalls.

Water Resources

RILEY has extensive technical ability and experience in all aspects of water resource engineering, particularly with regard to site selection, investigation, and design of dams and hydro-electric facilities.  Our North Island water resource team is led by Category A Recognised Dam Engineers.  We are frequently commissioned to provide advice and undertake dam safety reviews for all dam structure types and impact classifications.
Projects include the design and construction management of the 18m high Hopua te Nihotetea Detention Dam in Whangarei; five-yearly safety reviews for a variety of water retaining structures, including a number of Watercare dams; and spillway enhancement and crest raising of the Trustpower owned Patea Dam.


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