Progress engineered. Problems solved.
GWE WAIHEKE
From steep coastal sites to vineyard valleys, GWE Waiheke brings together expertise in geotechnical, stormwater, wastewater, drinking water and environmental engineering. We deliver buildable, compliant solutions tailored to Waiheke Island’s unique geology and coastal environments.
Geotechnical Engineering on Waiheke
Strong Foundations for Challenging Terrain
Waiheke’s steep slopes and variable soils demand specialist geotechnical expertise. Our engineers provide investigations and design solutions that keep developments safe, stable and compliant. Services include:
Slope stability and coastal erosion assessments
Foundation and retaining wall design
Liquefaction and settlement risk assessment
Groundwater and drainage management
Our Hilux-mounted Ground Master Geotechnical Drill Rig revolutionises investigation work. Compact, efficient and cost-effective, it enables reliable borehole drilling without expensive commercial rigs, ideal for residential sites through to large-scale industrial developments.
Stormwater Management
Protecting Coastal Communities
Stormwater management on Waiheke must balance development with environmental protection. We provide:
Flood impact assessments and hydrologic modelling
On-site stormwater detention and soakage solutions
Erosion and sediment control plans for steep sites
Consent documentation to meet Auckland Unitary Plan requirements
Drinking Water Engineering
Reliable Supply for Island Communities
Our engineers design and implement safe drinking water systems for Waiheke’s unique context, from rural properties to commercial vineyards.
Water source selection and treatment plant design
Transmission, storage and distribution networks
Water Safety Plans in line with Drinking Water Standards NZ
Wastewater Engineering
Compliant Solutions for Waiheke Properties
Residential Wastewater
Design of onsite wastewater systems for new homes, holiday houses and renovations. We also support replacements and upgrades, delivering faster consents and compliance and reliable long-term performance.
Commercial & Industrial Wastewater
Tailored industrial wastewater systems for vineyards, wineries, hospitality businesses and tourism facilities. We help secure trade waste permits and design sustainable systems that grow with future demand.
Municipal Wastewater
Support for councils and asset managers across planning, consenting, design and commissioning. Our multi-disciplinary team has local and international municipal wastewater experience.
Small Community Wastewater
Specialist design and consenting for decentralised wastewater systems for subdivisions, maraes and campgrounds. Our small community wastewater design solutions meet cultural, environmental and regulatory expectations.
Environmental Services and Contaminated Land
Protecting Waiheke’s Natural Environment
Our environmental engineers and scientists are SQEP-qualified, they assess, remediate and manage contaminated land to protect Waiheke’s land and water from contamination.
Site assessments and remediation planning
Risk management and regulatory compliance
Contaminated land investigations (PSI/DSI)
Remediation Action Plans, Site Management Plans and validation
Expert witness and professional reporting
We apply risk-based methods aligned with the NES for Managing Contaminants in Soil, supporting safe redevelopment of former industrial, agricultural or coastal sites.
Why Choose GWE Waiheke?
National coverage with local multi-disciplinary expertise of Waiheke’s geology, coastal erosion risks and infrastructure challenges.
Integrated expertise across geotechnical, stormwater, wastewater, drinking water and environmental services.
Proven ability to de-risk projects with investigations, design and essential reporting.
Trusted partners for architects, planners, developers, vineyard owners and property investors.