Best option for disposal:
If the timber has been grown in your garden and you know for sure it has had no chemical treatments it can be placed in small pieces in your green lid garden organics bin.
Do not place large or heavy pieces in your bin, otherwise it may not be emptied.
Otherwise:
Any timber that has been treated should be placed in your red lid garbage bin in small pieces. Do not place large or heavy pieces in your bin, otherwise it may not be emptied. Alternatively, treated wood can dropped off for a fee at Drysdale Resource Recovery Centre.
Any timber purchased for building purposes may have been treated with some sort of chemical, even if it says it is 'natural' or 'untreated'. Help us keep or green waste facility healthy by leaving any timber of this type out of your green bin.