My friend said this was a McMansion is it?

It looks wrong because it breaks from the patterns you've become familiar with.

You wouldn't see this on a period property because someone adding fancy stone additions to a brick building would have been aiming for a stone frontage. They could have built this and reskinned the small amount of original brick still showing.

And had someone 110 years ago been adding a two car garage to an existing brick house, they would probably have avoided removing an entire ground floor corner especially for that small increase in garage space. That and the floating gable above the garage is an architectural statement of "I access to affordable structural steel".

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