The Building Act is a new act, which entered into force on 1st of June 2018. The field of construction has been completely changed with it. Legislator has decided to change some of the term definitions. Because of less extensive documentation, obtaining building permit is now simplified. Persons, involved in building permit proceeding, are now listed again. Before the building permit is obtained, the investor now has an option of pre-decision regarding compliance of building, which can be binding for the authority. Previous consents are now prequalified into opinions, that are given by a competent organ. The newness here is that municipality must be mandatory opinion giver in three listed situations. So-called integral process is now a combination of acquiring environmental consent and building permit for structures with environmental impact. The final result of integral process is only a building permit. With the intention of better registration, the Act implements a new phase, in which the start of building must be reported. Operating permit is now also easier to obtain, but it is also an obligatory condition for a house number. Last one of the important novelties is the institution of three legalisation procedures. One of them is meant for legalisation of long existence structures (those are structures, built before 01.01.1998), while the other two are meant for inadmissible structures, that were built before this law's establishment.