When you read the article on the vote, the approving opinion really came down to one very important point: The proposed property simply meets the definition of a single family residence. The town's building ordinances do not define a single family residence by size (ie, square footage) nor do they define it by the number of attached garage spaces, be it below or attached to the side. Bottom line, three of the members felt that the Bahre's had met their burden of proof, and were granted the approval.
Note that the town has thirty days in which to appeal, or their lawsuit goes by the boards (which I hope is what happens).
Nice to know that you can build in Alton and add that 16 bay snowmobile shed to the side of the house, and still be a single family dwelling.