That would depend on what the shop is used for. To be a "detached structure that is part of a residential property," it would have to be detached from the primary residential structure and would have to be used primarily for personal, family or household purposes, and not primarily for agricultural, commercial, industrial or other business purposes.
If the shop is used for hobby work, it would probably qualify. If it is used in the property owner's business, it won't be exempted.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8