It appears that an 8.5 metre tall machinery shed, with an open front and storage area in the roof gable cavity and side office room, should be permissible without approval.
Research:
- https://www.moretonbay.qld.gov.au/Services/Building-Development/Planning-Schemes/MBRC/Info-Sheets/Domestic-Outbuildings
- https://www.moretonbay.qld.gov.au/Services/Building-Development/Planning-Schemes/MBRC/Info-Sheets/Accepted-Building-Work
Ideas:
- https://mecano.com.au/product/triple-garage-with-workshop-clearance/