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/
Owner builder
- https://www.qbcc.qld.gov.au/home-building-owners/owner-building/apply-owner-builder-permit ($428.35 fee)
- https://www.qbcc.qld.gov.au/home-building-owners/owner-building/owner-builder-course-providers ($228 at https://www.ownerbuildercentre.com.au/qld_owner_builder_course.php for example)