Hibiscus Coast · Auckland
Geotechnical engineers for Hibiscus Coast
Fast-growing new suburbs, coastal cliffs and estuary soils.
The Hibiscus Coast mixes some of Auckland's newest subdivisions with old coastal settlements on steep sandstone cliffs. On new lots the existing geotechnical completion report is usually the place to start. On older coastal sections, cliff stability and erosion setbacks tend to drive the design.
Ground conditions in Hibiscus Coast
Waitematā Group sandstone and siltstoneForms the Whangaparāoa Peninsula and coastal cliffs.
Tauranga Group alluviumSoft estuarine and river soils around Orewa, Silverdale and the Weiti River.
Engineered fillLarge new subdivisions at Millwater, Milldale and Wainui.
What we look out for
- Coastal cliff erosion along the peninsula
- Slope instability on steep sections
- Soft and compressible estuarine soils
- Expansive clays
Typical projects
- Houses and retaining on steep Whangaparāoa sections
- New-build lots in Millwater and Milldale
- Coastal setback assessments
Every site is different. Geology maps and council overlays are a starting point; a site-specific investigation confirms what is actually there.
Start a project
Building in Hibiscus Coast? Send us the site address and we'll tell you what geotechnical input you need.
You get a clear, fixed scope and fee up front. Prefer to talk? Call 09 218 6915 or email info@gibbritchie.co.nz.
