The lack of a comprehensive capital gains tax system in Iran, coupled with inflationary conditions and the attractiveness of unproductive assets, has increased speculation and volatility in the housing market. This research examines the effects of capital gains tax, rental income tax, and housing value tax on housing prices and demand, with emphasis on the role of inflationary adjustment of capital gains. For this purpose, a general equilibrium model is employed using the frameworks of Iacoviello and Neri (2010), Alpanda and Zubairy (2016), and Sommer and Sullivan (2018). The results show that increasing the capital gains tax rate from zero to 40 percent, along with increasing the rental income tax, in both inflation-adjusted and non-inflation-adjusted cases, reduces the relative housing price index and increases household demand for private housing. In the inflation-adjusted case, the relative housing price index decreased from 0.942, 0.924, and 0.905 to 0.691, 0.627, and 0.654 across three scenarios, while household housing demand increased from 1.504, 1.533, and 1.565 to 2.051, 2.107, and 2.166. In the non-inflation-adjusted case, the housing price index changed from 2.605, 2.587, and 2.568 to 1.689, 1.670, and 1.652, and housing demand changed from 0.544, 0.548, and 0.552 to 0.839, 0.848, and 0.858. Furthermore, the imposition of an annual tax on housing value exerts a downward effect on the relative price of housing. Therefore, targeted implementation of capital gains tax with inflation adjustment, completing the housing sector's tax bases, and strengthening information and administrative infrastructure can help stabilize the housing market.