How much does a Sydney geotechnical investigation cost?
Sydney Geotechnical's geotechnical investigations start from $2,200. The final quotation depends on the actual engineering questions, proposed development, site constraints, investigation locations and reporting requirements. A starting price is not a fixed quotation for every project.
A targeted AS 2870 residential site classification is a different service and starts from $750. Larger developments, retaining structures, difficult access, deep excavations and complex ground conditions can require a broader investigation rather than a basic site classification.
Fieldwork, depth and site access influence the scope
The number and depth of investigation locations should reflect the proposed structure and relevant site risks. A single residential dwelling, duplex, commercial building and basement can need very different subsurface information.
Restricted gates, steep driveways, existing buildings, buried utilities, hard ground and equipment access may influence field methodology. Drilling, sampling, in-situ testing and laboratory work are included only when appropriate to the agreed scope.
- Site location, access and safe working conditions
- Number and depth of boreholes or investigation points
- Soil or rock sampling and any required testing
- Retaining walls, slopes, basements and groundwater questions
- Engineering assessment, drawings review and reporting requirements
Provide the right documents for an accurate quotation
Send the site address, current architectural or site plans, the proposed development and any structural-engineering, council or certifier request. Photographs of access, retaining walls, slopes or existing excavation can also clarify the practical fieldwork requirements.
Do not assume that the least expensive scope answers every design question. A proportionate investigation should address the project-specific ground risks and the information genuinely required by the relevant designer or approval authority.
Common questions
Geotechnical investigation costs: common questions
What is the starting price for a Sydney geotechnical investigation?+
Sydney Geotechnical's geotechnical investigations start from $2,200. Final pricing depends on the agreed project-specific investigation and reporting scope.
Is site classification included in every investigation quote?+
Not automatically. Site classification and broader geotechnical investigations address different project needs and should be specified in the agreed scope.
Can access restrictions affect the quotation?+
Yes. Access width, slopes, existing structures, underground services and equipment suitability may influence field methodology and the cost of the agreed investigation.
Need Get a geotechnical investigation quote in Sydney?
Get a scope matched to the project
Send the site address, proposed works, current plans and any request from your builder, engineer, council or certifier. Sydney Geotechnical will review the information and confirm an appropriate scope and fee.
This guide provides general information only and is not a substitute for investigation, engineering advice, footing design or approval advice for a particular property. Project requirements and ground conditions must be assessed site by site.
