- See questions above.
Also what about putting up a mezuza on the garage - does that require a brocha or is it only a Rabbinical obligation?
A. In our days a garage is also usually used for the storage of different items and other uses, and a mezuza may or should be placed. It is better to do it when placing a mezuza in another proper room to avoid doubts on the bracha. (even places that require a mezuza Rabinically should place it, sometimes even with a blessing.)
Horav Shlomo Miller’s Shlit’a opinion is similar.
See also question 3311 in regards to smell. And question 2034 regarding a backyard shed.
Rabbi A. Bartfeld as revised by Horav Y. Hirshman, Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu Shlit’a