There could be a million reasons why that is. I doubt that I could pinpoint exactly why since we're separated by the atlantic ocean.
My guess is though that you have attached a certain significance to the place or that you associate your house with some emotion or thought. Either way they're both forms of attachment and if you can overcome it then you should make progress. It could also be due to distractions, and nature does seem to have a relaxing effect on most people.
Still, if meditating and practising there works for you, then there is probably no problem.
Sticks n stones'll break my bones, but if I land the first one, you're in trouble!