It depends a lot on how strong the WIFI signal is from your router out in the garage.
I would first consider powerline device if the garage and house are on the same electrical meter.
Your first attempt would be a directional bridge like engenius enh202 (this is just a example there are many both from engenius and ubiquiti). You would put this in the garage and point it at the house and see if you get a usable signal. It is not actually designed for that purpose but at that short a range the signals will go through walls.
If that does not work you then buy 2 units and put one on the house and one on the garage. As long as they have clear line of sight you will get a very good connection at that distance even with the low cost...