Retaining walls and slopes you can rely on

Auckland's hills make retaining walls and slope stability a common part of building. We design walls that suit your site and assess slopes so you can build with confidence.

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From a single timber pole wall behind a house to stabilising a slip on a development, we deliver practical, cost-effective solutions.

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When you need us

• New retaining walls over 1.5 m, or carrying extra load

• Building on or near a slope

• Sites in a council instability overlay

• Slips, cracking or wall movement

• Cuts and fills for driveways, platforms and subdivisions

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What's included

• Slope stability assessment and analysis

• Retaining wall design, including timber pole walls

• Slip assessment and remediation design

• Drainage recommendations

• Building consent documentation

• Construction inspections and PS4 sign-off

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How it works

1. Send us your plans and the site address.

2. Desk study. We review geology maps, the NZ Geotechnical Database, council records and historic aerials.

3. Proposal. You get a clear scope, fee and programme.

4. Site work. Our team carries out the fieldwork or inspections with minimal disruption to your site.

5. Report. Clear findings and practical recommendations.

6. Ongoing support. We answer council RFIs and support you through design and construction.

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Why Gibb Ritchie

• Principal-led. A director is involved in every project, from scope to sign-off.

• Chartered professionals. Work led by Chartered Professional Engineers (CPEng).

• Local experience. We know Auckland's ground, from North Shore clays and Waitematā rock to volcanic and reclaimed land.

• Practical advice. Solutions that are technically robust, commercially realistic and fit your project.

• Responsive. We know geotechnical input is often on the critical path for design, consent and construction.

• With you to the end. The same team supports you through consent and construction.