We've typically kept our bikes (12-15) in an attached garage during the summer, we had a 3-car garage and lots of room (Lisa's road bike was in her office). Over winter, two road bikes went to a spare bedroom for Zwifting, most other bikes in the basement, except the winter bikes stayed in the garage.

We are 2 months into our downsized house and are working out the details of bike storage. We've been getting rid of a couple unused bikes, storing 2 road bikes in the finished basement, one classic road bike in my office, and the rest live in the detached garage. I plan to keep 6 bikes in the house over the winter, two in my office, two on the trainers in the finished basement, and two in a storage closet in the basement. That'll leave two fatbikes, two commuters, and the beast (tandem) in the garage for the winter.

The plan for summer 2019 is to replace the crumbling 2-car detached garage with a 1-1/2 story 2-car garage with a stairway to the second story for bike storage/shop space. Just called to get a bid on this project.... excited!! I expect 2-3 bikes will continue to live in the house after we build the new garage.

Funny backstory, Lisa was the first one to get a $3K+ bike and that was the first bike that got 100% indoor storage.

We've been together for 30+ years ... so we have the relationship thing working OK.