Slope Stability Testing - sloping blocks?

Just wondering if it is essential to go to the extent of getting a slope stability test when considering a property on a significantly sloping block.

The property is existing? What does such a test cost? Age of the property?

Recommend you contact builders who have experience on sloping blocks or similar terrain or in your area and discuss your property with them. They may even meet you on the site and tell you what they think you'll need in terms of tests. Do a bit of a internet searching and talk to a few of them and see who gives you the best information (and works in your area). Avoid the big volume builders, they pretty much murder sloping blocks and charge huge site fees even if they do agree to tackle the job.

^^^^^^ As per Matergabiae.

It is vital to excavate down in a test area to see what you're dealing with.

Foundations = pretty bloody important

Hi Roberto,
If you haven’t bought the block yet, you can make the purchase (or your offer) condition to geotechnical surveys. A great way of covering yourself & leaving your options somewhat open if you have a concern about the block.
I work for a builder who specialises in building on sloping blocks. This is one of the clauses we recommend “if in doubt”.
I wouldn’t go to the extent of digging test pits – because based on the slope (& other factors) the right builder will design a house suitable to the block, based on best hillside building practises. These mainly revolve around minimising site cuts & excavations, building on stumps as opposed to concrete slabs, etc.

Hope this helps
Patrick Boucher
Edited by Forum Support

If you find a good custom builder with experience on sloping blocks, who will go and visit the site with you, they will recommend a soil test. Until a soil test is done, you don't really know what your site costs will be. When they test, they bore until they hit rock or solid clay base.
It is also important to know if there is any fill involved, as this will involve removal. And where there's hills there's rock, which will need to be considered.
Look on line for some tips to choose the right custom builder for your home, and make sure they are conversant with a variety of appropriate techniques, as this will demonstrate they have significant experience with building solutions for sloping blocks.
If a concrete slab is appropriate, excavation will be handled with a view to the big picture. In many cases, a split level slab or a timber sub-floor will be a better solution.
Sloping blocks are generally the most beautiful homes, when you get it right! It's worth the time and energy.