How can foreigner buy real estate in Poland?

If you are foreigner interested in buying a property in Poland you must first answer the question if you are a citizen of Member States of the European Economic Area. If your answer is "yes" - you can buy almost every real estate, except of agricultural and forest real estate (during the period of 12 years of the Republic of Poland Accession to the European Union), and second house (during the period of 5 years of the Republic of Poland Accession to the European Union).
For all foreigners coming from different countries there is one general rule - you should have an official permit (an administrative decision from the minister competent in internal affairs). But permit is not required if for example: you buy a separate living accommodation, you buy real estate if you are living in the Republic of Poland for at least 5 years following the granting of a permit to settle thereto, you are the spouse of a Polish citizen and residing in the Republic of Poland for least 2 years following the granting of a permit to settle thereto, of real estate that as a result of acquisition shall constitute marital estate of the spouses, etc.
All details you can find on the web side of The Ministry of Interior and Administration. Read very carefully art. 8 of the Act. And buy real estate in Poland!