Geotechnical Engineering
Geotechnical Site Investigation
KFM Geotech provides geotechnical site investigation services to public and private sector clients across NSW. Our team combines current regulatory knowledge, technical leadership and innovative problem-solving to deliver clear, practical advice on complex ground conditions.
Scope of Work
Key Services
Included
Each investigation is scoped to your specific project requirements. Not every service below is included in every engagement — our proposal outlines exactly what applies to your site.
The Service
What is Our Approach For
Geotechnical Site Investigation?
We support a broad client base developers, builders, civil contractors, architects, structural and civil engineers, and local and state government across residential, commercial, industrial and infrastructure projects.
Why It Matters
Four Reasons to
Investigate Early
Reduce Construction Risk
Understand subsurface hazards before excavation begins, avoiding costly surprises during construction.
Meet Council Requirements
Geotechnical reports are typically required for DA submissions, building approvals, and infrastructure works.
Improve Foundation Design
Accurate bearing capacity and settlement data enables your structural engineer to design efficient foundations.
Avoid Costly Delays
Early identification of poor ground conditions allows program adjustments before delays become expensive.
How It Works
From Inquiry to Report Delivery
A clear process designed to help clients move from first contact to technical recommendations with confidence.
01
1 business day
Initial Enquiry

Submit the contact form or call KFM with your project details. KFM responds within 1 business day to acknowledge your enquiry and clarify the scope.

01
02
2–3 business days
Scope & Proposal

KFM reviews the project documentation, site address, and requirements, then issues a fee proposal and scope of works within 2–3 business days.

02
03
On-site work
Site Investigation

Field works are mobilised, including drilling, sampling, and in-situ testing, supervised by a senior engineer or geologist.

03
04
3–5 business days
Laboratory Testing

Collected samples are tested in accordance with relevant Australian Standards

04
05
2–3 business days
Analysis & Reporting

Data is analysed, engineering recommendations are prepared, and a draft report is issued for client review.

05
06
Inspections & certification
Construction Support

Where required, KFM provides on-site inspections, certificates, and real-time geotechnical advice during excavation, filling, or piling.

06
Compliance
Designed Around Technical Standards

KFM’s work is informed by relevant Australian Standards, council requirements, and project-specific engineering guidelines where applicable.

AS 1726

Geotechnical Site Investigations

AS 2870

Residential Slabs & Footings

AS 4678

Earth-Retaining Structures

TfNSW

Transport for NSW Guidelines

Council

Local Council Requirements

Project Case Study
A Recent
Project Example
Residential Development
📍 Bellevue Hill, NSW
Apartment Development — Bellevue Hill, NSW
Challenge
A multi-unit residential development in Bellevue Hill required subsurface data to define founding conditions, where variable sand thickness over sandstone controlled both footing design and the depth of the proposed excavation.
Solution
KFM Geotech drilled three boreholes (BH1–BH3) with continuous rock coring to 11.5 m, logged the profile from topsoil through very loose to dense sand into Class V, IV and III sandstone, and produced a geological section across the site to define rock levels between boreholes.
Outcome
The investigation defined founding levels and rock classifications across the site, giving the structural and excavation designers the parameters they needed without relying on assumed rock levels.
50+
Years Combined Experience
1000+
Projects Delivered
NSW Wide
Coverage
AS 1726
Standards Aligned
FAQ
Frequently Asked
Questions

Can’t find the answer? Call our engineering team directly.

How long does a geotechnical site investigation take?

It depends on site access, the number of boreholes and the testing required. For a typical residential or small commercial site, fieldwork is usually completed in one day, laboratory testing takes a further 3–5 business days, and the report is issued 2–3 business days after results are received. Rock coring, CPT programs and larger sites take longer. KFM confirms the program in the fee proposal before mobilising.

There is no fixed number. It depends on the site area, the proposed structure, how variable the ground is, and the requirements of AS 1726 and your council. A single dwelling may need two or three test locations; a multi-storey building over a basement usually needs boreholes across the footprint plus rock coring. KFM scopes the number and depth to your project and states them in the proposal.

In most cases, yes. Councils across NSW commonly require a geotechnical report to support a development application, particularly where there is excavation, a basement, sloping ground, landslip risk, or a site classification requirement. Requirements vary by council and development type, so it is worth checking the conditions that apply to your site — KFM can review them with you.

AS 1726 is the Australian Standard for geotechnical site investigations. It sets out how ground investigations are planned, how soil and rock are described and classified, and how findings are reported. Working to AS 1726 means your report uses consistent, recognised terminology that structural engineers, certifiers and councils can rely on, and that another engineer can interpret the same data the same way.

Yes. KFM provides construction-phase support including footing inspection and acceptance, piling platform inspection, piling supervision, in-situ testing (DCP and plate load), proof roll testing, crane pad assessment, batter and trench inspection, anchor and soil nail acceptance testing, and haul road and ramp inspection.

You hear about it from site, not at report stage. If conditions differ from what was expected — shallower or deeper rock, groundwater, fill, or signs of contamination — KFM contacts you to discuss the implications and agree how to proceed, whether that means extending a hole, adding a test location, or re-scoping. Any change to the agreed scope or fee is confirmed with you before the extra work is done.

Start Your Enquiry
Need Geotechnical Advice For Your Project?

Talk to our engineering team about your project requirements. We’ll clarify the scope, advise on investigation methodology, and provide a fixed-fee proposal.