Not the easiest or ideal, but most people find creative ways to store in the house. By the bed, behind coach in living room, in hall way, on the wall, etc. I somehow managed to store 4 bikes in a one-bedder for many years, getting in/out was the biggest challenge.
It's good because it sets a hard limit on how many bikes you can buy.
If you're renting and can't drill into the walls, this is a good option, especially if only 2 bikes https://winstanleysbikes.co.uk/delta-michelangelo-gravity-bike-storage-rack