Meditating always in the same place and time is a good help in focusing the mind. Your brain associates that place with the practice, so it is easier for you to focus. There is less distraction involved.
I usually find it easier to focus when I meditate in my preferred spot. Yet, at times I felt a different freshness in the practice when I sat on different places at home and in nature.
So, to sum it up: have your favorite meditation place in your house, but from time to time try different places. You should not be limited to finding your inner peace only in one or two places.