
The author presents the characteristics of the legal instruments available to the buyer of a flat or a single-family house if a developer defaults under the development agreement within the agreed period. He assesses their effectiveness, especially in the context of the current socioeconomic situation, and takes cautious de lege ferenda conclusions. The provisions of the Act of May 20, 2021 on the protection of the rights of the buyer of a flat or
single-family house and the Development Guarantee Fund, which entered into force on July 1, 2022, as an act intended to improve the protection of the buyer, are analysed in particular.