Ground you can build on, backed by professional engineering.
Sydney Geotechnical delivers site investigations, AS2870 classifications, inspections and slope & retaining wall analysis for homeowners, builders and developers across Greater Sydney and New South Wales.
100% obligation-free · Most enquiries answered within 1 business day · Now accepting new projects across Sydney & NSW
*For standard site classification and inspection reports once fieldwork is complete; investigations requiring laboratory testing may take longer.
Geotechnical services for every stage of your project
From early feasibility through to construction sign-off, we provide the geotechnical advice councils, certifiers and structural engineers require.
Geotechnical Investigations
Boreholes, test pits and DCPs with laboratory testing to characterise subsurface conditions for footing and foundation design.
Learn more →Inspections
Footing, foundation and compaction inspections carried out on-site to verify conditions match design assumptions.
Learn more →Site Classification
AS2870 residential site classification reports for slab-on-ground footing design, accepted by councils and certifiers.
Learn more →Slope Stability Analysis
Assessment of natural and constructed slopes, landslide risk and stabilisation options for Sydney's sandstone and sloping sites.
Learn more →Retaining Wall Analysis
Design review and structural adequacy assessment of retaining walls, including lateral earth pressure calculations for DA/CDC approval.
Learn more →Council & DA Support
Clear, defensible reports written to satisfy council and certifier requirements, reducing delays in your approval process.
Request support →Competitive prices, uncompromising quality
Every job is quoted as a fixed fee before we start, confirmed in writing. What you're quoted is what you pay — no hourly surcharges, no hidden call-out fees. We keep our pricing lean without cutting corners on the engineering, so you get a fully compliant, council-ready report at a genuinely competitive price.
Site Classification
From $750
AS2870 classification for a standard residential block
- ✓Site assessment & soil testing
- ✓AS2870-compliant report
- ✓Council & certifier ready
Inspections
From $450
Footing, compaction or retaining wall inspection — single visit
- ✓Footing, compaction & earthworks or retaining wall inspection
- ✓Short-form compliance report
- ✓Builder 3-visit package from $1,200
Geotechnical Investigation
From $2,200
Boreholes/test pits with foundation recommendations
- ✓Boreholes, test pits or DCPs
- ✓Laboratory testing coordination
- ✓Foundation design recommendations
Slope & Retaining Wall Assessment
From $1,500
For sloping sites and retaining wall approvals
- ✓Site & slope assessment
- ✓Engineering analysis
- ✓DA/CDC-ready recommendations
Exact pricing depends on site access, size and scope — tell us about your project and we'll confirm your fixed-fee price with no obligation to proceed.
Developers & Builders
Special rates for developers and builders — multi-lot subdivisions, staged developments and repeat trade accounts get priority scheduling and volume-based pricing. Get a fast, free quote with no obligation.
Get My Fast, Free QuoteEngineering expertise, local Sydney knowledge
We combine professional geotechnical engineering knowledge with deep familiarity of Sydney's varied ground conditions — from Hawkesbury sandstone on the North Shore to reactive clays in Western Sydney.
- ✓Professional Indemnity Insured
Our engineering team prepares every report in accordance with relevant Australian Standards, and we carry professional indemnity and public liability insurance for your peace of mind. - ✓Local Sydney and NSW experience
We understand the reactive clays, sandstone escarpments and fill conditions typical across Sydney and NSW's suburbs. - ✓Fast, clear reporting
Plain-English reports that structural engineers, builders and councils can act on quickly. - ✓Full project support
From feasibility investigation through to construction-stage inspections and sign-off.
A straightforward process, start to finish
Enquiry & Scope
Tell us about your site and project — we confirm scope and a fixed-fee quote, usually within 24 hours.
Site Investigation
Our team attends site to carry out boreholes, test pits and/or inspections as required.
Analysis & Reporting
Laboratory results and engineering analysis are compiled into a clear, council-ready report.
Support to Approval
We're available to liaise with your certifier, structural engineer or council through to sign-off.
Proudly serving Greater Sydney and NSW
Wherever you're building in Sydney or across New South Wales, we can help — including these areas and everywhere in between:
Trusted by Sydney builders and homeowners
"Responsive, thorough and the report was accepted by council without any follow-up questions."
"Clear communication throughout and a fast turnaround on our site classification."
"Their slope stability assessment gave us the confidence to proceed with our build."
Placeholder testimonials — replace with real client quotes once available (with their permission).
Frequently asked questions
Do I need a site classification report for my new home in Sydney or NSW?
Yes — most councils and certifiers across New South Wales require an AS2870 site classification report before footing and slab design can be finalised for new residential construction or major additions.
How much does a geotechnical report cost?
We price every job as a fixed fee, confirmed in writing before we start — so there are no hourly surcharges or surprise invoices. The exact price depends on site access, size and scope; tell us about your project and we'll send a fixed-fee quote with no obligation to proceed.
How long does a geotechnical investigation take?
Fieldwork is typically completed within a day for standard residential sites. Our typical report turnaround is 8–48 hours for standard site classification and inspection reports once fieldwork is complete; investigations requiring laboratory testing may take a little longer.
Do you provide reports for retaining walls and sloping sites?
Yes — we provide slope stability assessments and retaining wall analysis for sloping and constrained sites across Sydney and NSW, including council DA and CDC submissions.
Are your reports prepared by a qualified engineer?
Yes — our reports are prepared by our qualified geotechnical engineering team in accordance with relevant Australian Standards, and we carry professional indemnity and public liability insurance.