Change in tax rate for commercial to mixed use building conversion.

Hi,

I’ve been looking at the possibility of converting an all commercial building into mixed use and was wondering if the taxes would change with the use? Both buildings I’m looking at are in R-5 zones with a commercial overlay. Also, how annoying will it be to convert them? It seems pretty straightforward, but I do understand it takes time, becoming code complaint, and legal/filing fees.

Thanks in advance!