The development of the information society requires an appropriate infrastructure. One of its pillars is information on the boundaries of property ownership rights and information on buildings. According to Polish regulations, this information is included in the land and buildings register database (EGiB). In case of poor quality and incomplete data that does not meet statutory requirements, a modernization of the database is necessary. Its proper execution requires large amount of work and money. For this reason in recent years many programs have been created, co-financed from EU funds, under which geodetic works are conducted, including the modernization of the land and buildings register database. The paper presents an analysis of the main factors affecting the prices of modernization of land and buildings register in Małopolskie Voivodeship. For this purpose, data from tenders for the modernization of the EGIB database, published by public administration units operating this database, were used. The model containing multiple regressions allowed to estimate that the cost per unit of modernizing EGiB is impacted by: total plots/ha, the amount of buildings for measurement/ha and the type of maps in geodetic documentation.