Quoting: Chris777m
Any foreigner can buy an apartment in Poland. They cannot buy houses without a permit (although a permit may be possible) or land until 2009
Any citizen of the European Economic Area can by land or houses in Poland. Some restrictions exist concerning farmland and forestry, however the legality of those restrictions is ropey to say the least (a deal eith the EU commission, NOT the EU parliament), and could easily be challenged in the European Court by anyone with enough money. And in any case, the farmland restriction run out soon.
The rule about bying only one house relates only to non-EU foreigners who are permanent residents here. If you are not a permanent resident, or have EU citizenship, no such restrictions apply.
Don't be tempted to by farmland with a Polish co-owner, people (mostly from Germany) have been ripped of that way.