Integral hotels represent an innovative concept in hospitality, allowing small renters to combine their services into a unified hotel entity. This paper explores the potential for improving accommodation offerings through integral hotels with a particular focus on sustainable tourism development in Croatia. The current state of the hotel industry in Croatia is analyzed, along with the concept and application of integral hotels worldwide, and the possibilities for their implementation in Croatia. Special attention is given to a SWOT analysis identifying the strengths, weaknesses, opportunities, and threats associated with this model. A case study includes the project of integrating four apartments in the city of Kaštela into an integral hotel, demonstrating practical steps, financial analysis, and strategies for successful integration. The research results suggest that integral hotels can significantly enhance the quality of accommodation and the competitiveness of the tourism offer, with a positive impact on sustainability.