Despite growing recognition of the economic potential of heritage sites, most prior studies have focused narrowly on tourism outcomes without comprehensively evaluating how cultural heritage management affects broader local economic development. Additionally, previous research often employs basic analytical approaches and overlooks critical dimensions of sustainable heritage management. This study addresses these gaps by examining the impact of Sustainable Heritage Management (SHM) on Sustainable Local Economic Development (SLED), focusing on Balekambang Park, a revitalized heritage site in Surakarta, Indonesia. The research investigates how each dimension of SHM influences SLED, both individually and collectively. The study adopts a quantitative approach using the Structural Equation Modeling Partial Least Squares (SEM-PLS) method. Data were collected from 289 respondents who had visited the site at least once in the last year, using non-probability purposive sampling. The findings indicate that all dimensions of SHM significantly influence SLED, with the environmental dimension demonstrating the strongest effect, followed by the governance, economic, and sociocultural aspects. These results highlight the strategic importance of integrating environmental preservation and effective governance into heritage site management to ensure long-term economic sustainability. This research novelty lies in its specific focus on Balekambang Park as a unique case study, providing the first comprehensive, data driven analysis of how multiple SHM dimensions collectively influence local economic development using advanced structural modeling. It offers practical implications for policymakers, local governments, and heritage site managers to optimize heritage-based tourism development while maintaining cultural and ecological integrity.