Acoustics in buildings is a branch of technical regulations that has been somewhat neglected and overlooked in Croatia for a long period of time, and the corresponding requirements have not been properly regulated ever since Croatia was recognized as an independent country. The relevant experts resorted to using the standards taken over from the previous period of Croatian history in which the country existed as a part of Yugoslavia. Over time, these standards have been officially withdrawn or have fallen out of use, but some of them have continued to be used as no other regulation documents were available. Several unsuccessful attempts have been made to replace these old standards by creating an appropriate document to succeed them. This paper presents the current endeavours to develop the new Technical Regulation on Acoustics in Buildings in Croatia, undertaken by experts from all the relevant fields of expertise, backed up by representatives of relevant professional and governmental institutions. The purpose of this technical regulation is to provide technical requirements that concern sound insulation in buildings for all their critical parts, requirements on the levels of internal noise generated by outdoor and indoor sources, and the requirements on room acoustics, either as a prerequisite for achieving optimal acoustic conditions or simply as a measure for reducing the noise caused by excessive reverberance. The motivation for developing this document is presented, as well as its scope and content. The document is currently undergoing final stages of approval and is expected to be released by the end of 2024.