This article makes the first systematic attempt to analyse quantitatively the evolution of Spanish housing markets from 1904 to 1934, a period of dramatic changes in housing demand as a consequence of substantial income and demographic growth. In order to do so, we collect a new database on houses sold and their prices using data from the Registrar's Yearbooks. Furthermore, we construct a new hedonic index of real housing prices for Spain and its provinces. To our surprise, we found that real housing prices rose slightly over the entire period and, hence, that housing supply responded effectively to new demand for housing.