>thinking about putting a half bath in it. we have 1 kid and
>will prolly have 1 more at the most.
>
>thanks for the info
>
>few people have told me it would hurt the resale value but all
>the houses on our block that converted theirs have a higher
>value due to more sq ft.
>
>


I mean, if the AC/heat is currently struggling to keep ya'll comfortable in the main house, an additional 200+ sq ft may make your current unit seem inadequate or even break it if you have to run it longer to keep everything comfortable

Good insulation in the new room will go a long way to help but if the system is already near it's capacity, you'll be buying a new AC at some point in the near to mid-term future too.