Sheds such as our 10 x 10 | 8 x 10 | 8 x 12 can typically be build in most metro vancouver municipalities without a building permit. if you want to build a shed larger than the maximum shed size allowed without permit you will need to obtain a building permit from your local municipality. figuring out the maximum shed size without permit in. Build a retaining wall more than four feet high structures that have been built without a building permit when a permit was required for • build, demolish, or move a carport, garage, or shed of more than 200 square feet and/or 10 feet in height. Where i live you can build a shed, any size, without a permit. it can even sit next to a property line. but as soon as you pour a slab, it is considered permanent, and you need a permit, and whatever easements for any possible encroachment.. Rob...