Compulsory purchase (or eminent domain) is one of the last resort methods of land acquisition used in many countries. Since it infringes the property ownership right it is regulated both by international legal acts and legal acts in particular countries. As many scientific papers show different countries developed different rules of compulsory purchase. Some countries had to change their legal acts due to very important investment projects undertaken during last years. These study compares different aspects of compulsory purchase systems of two countries that in the last few years carried out one of the biggest infrastructural investment in Europe: - Poland (the coorganizer of UEFA EURO 2012) and United Kingdom (the organizer of 2012 Olympic Games). It Describes legal acts regulating them, characterizes differences in land acquisition procedures and rules concerning compulsory purchase compensation determination.