A simultaneous equations model of bid and offer functions for housing attributes(dwelling quality, dwelling size, and lot size) is estimated in order to accountfor the heterogeneity of the housing good. Estimation of a traditional, nonlinear hedonic price equation in the first stage provides a basis for calculating implicit prices for housing attributes which are used in the second stage simultaneous equations model. Empirical results confirm the theoretically expected negative coefficient for each attribute in its own bid function and theexpected positive or zero coefficient for each attribute in its own offer function. Cross price relationships reveal a general pattern of complementarity in consumption of housing attributes.