<p>This study explored the determinants of capital structure, optimal capital structure, and adjustment speed in real-estate, property, and construction firms in Indonesia. It conducted a quantitative analysis of the annual report of 25 listed firms by employing a generalized method of moment approach with panel data to estimate the result. Results showed that the determinants of capital structure, such as profitability, tangibility, size, and liquidity, have a negative impact on leverage. By contrast, a non-debt tax shield has a positive impact. Based on the regression result, firms have an optimal capital structure target with a yearly adjustment speed of 80%. Furthermore, calculation of optimal target structure shows that firms require approximately three years to meet the discrepancy between their current capital structure and the targeted capital structure.</p>