Guides for your Sydney project
Straightforward answers to the soil, geotechnical and DA questions we get asked every week — written for owners, builders and designers, not engineers.
What is AS 2870 site classification?
A plain-English guide to site classification, what each soil class means and why every new home needs one.
Read guideDA documentation checklist by council
The reports and documents Sydney councils expect with a residential Development Application, in one place.
Read guideSoil classes explained: A to P
A quick-reference guide to soil classes A, S, M, H1, H2, E and P and what they mean for your footings.
Read guideDo I need a geotech report for my DA?
When a geotechnical report is required, what it covers, what it costs and how long it takes.
Read guideSydney council DA requirements
What you actually need to lodge a Development Application in Sydney — from the Planning Portal to supporting reports.
Read guideGot a specific question about your site?
Call us with your site address and we’ll tell you exactly which reports and tests your project needs.