When a DA geotechnical report may start from $750
A geotechnical report for a Sydney development application may start from $750 where the written DA requirement can be satisfied by a suitable standard AS 2870 residential site-classification scope. This may apply to some straightforward new-home, extension, addition or secondary-dwelling projects.
The $750 figure is a starting price, not a universal DA-report fee. Sydney Geotechnical reviews the proposed development, plans, site access and exact council or certifier request before confirming the required scope and fixed quotation.
A site classification is not every type of DA report
An AS 2870 site classification supports residential footing and slab design by assessing relevant ground conditions and expected moisture-related movement. It may also identify Class P or other project-specific site factors. For some residential applications, this is the geotechnical information requested by the design or approval team.
Other development applications require a broader investigation addressing slope stability, excavation, retaining walls, basement conditions, deeper foundations, fill, groundwater or effects on neighbouring property. These questions require a project-specific scope and cannot responsibly be included under every $750 report.
What can increase the DA report scope and price
The appropriate fee depends on the engineering questions that the report must answer. A larger or more complex proposal may require additional investigation locations, greater depth, mechanical drilling, laboratory testing, engineering analysis or coordination with survey and structural information.
- Sloping land or a mapped landslide or instability concern
- Basement excavation, deep cuts or work close to a boundary
- Substantial retaining walls or surcharge from nearby structures
- Deep fill, soft ground, groundwater or variable founding conditions
- Piling, commercial loads, subdivisions or multi-unit development
- A council request for specific stability, excavation or foundation information
What to send for an accurate fixed-fee quote
Send the complete site address, proposed development, current architectural plans, survey if available and the exact wording of any council, certifier, structural-engineer or planner request. Site-access photographs and previous reports are also useful.
Sydney Geotechnical will identify whether a standard residential classification is suitable or whether the DA needs a broader investigation. The scope, fee, turnaround and deliverables are then confirmed before fieldwork.
- DA reference or written information request
- Architectural drawings and proposed development description
- Survey, contours and proposed excavation or fill levels
- Retaining-wall, basement or structural information
- Access photographs and any previous ground reports
What the report does—and does not—provide
The report provides the geotechnical information and recommendations defined by the agreed scope. It should clearly document the investigation, interpreted ground conditions, relevant limitations and information required by the project team.
A geotechnical report does not guarantee development consent and does not replace architectural, structural, civil, planning or other professional services. The relevant council or consent authority remains responsible for the DA decision.
Common questions
Geotechnical reports from $750 for DA support: common questions
Does every development application need a geotechnical report?+
No. The requirement depends on the proposed development, site conditions, planning controls and any request from the relevant council, consent authority, certifier or design professional.
Does every DA geotechnical report cost $750?+
No. Reports start from $750 only where a suitable standard AS 2870 residential site-classification scope addresses the project requirement. Broader DA investigations are quoted according to the required fieldwork, analysis and deliverables.
Will the report guarantee DA approval?+
No. Sydney Geotechnical addresses the agreed ground-related scope, while the council or relevant consent authority determines the development application.
What should I provide for a quotation?+
Provide the site address, proposed development, current plans, survey if available, access photographs and the exact written request from the council, certifier or design team.
Need DA geotechnical report assessment 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.
