The article investigates the ongoing urbanization processes at suburban zone's in Poland. Due to the weak spatial planning system and the lack of legal restrictions inhibiting the expansion of urbanized areas only in the last 15 years their surface per capita in Poland has increased by approx. 20% (according to the Central Statistical Office of Poland). The spatial policy of polish cities needs to cope with the process of excessive dispersion of development. According to the strong position of private properties owners in Poland, there can be seen the weakness of urban planning, which in fact is unable to use well known planning tools, like re-parceling or other types of urban planning regulations. The paper shows characterization of urbanization processes on examples of few Polish cities.