“…1. Hence we consider the sale price of the apartment, alongside several structural attributes similar to previous papers such as number of rooms (Keskin, 2008;Czembrowski and Kronenberg, 2016;Ligus andPeternek, 2016 Selim, 2009;Baranzini and Schaerer, 2011), house surface (Wilhelmsson, 2002;Jim and Chen, 2009;Selim, 2009;Chen and Jim, 2010;Hui et al, 2012;Ibeas et al, 2012;Efthymiou and Antoniou, 2013;Ooi et al, 2014;Zhang and Leonard, 2014;Kim et al, 2015;Czembrowski and Kronenberg, 2016;Ligus and Peternek, 2016;Tian et al, 2017;Wu et al, 2017;Brecard et al, 2018;McCord et al, 2018;Yuan et al, 2018;Dahal et al, 2019;Laszkiewicz et al, 2019;Yang et al, 2019), comfort, floor level (Keskin, 2008;Jim and Chen, 2009;Chen and Jim, 2010;Baranzini and Schaerer, 2011;Hui et al, 2012;Ibeas et al, 2012;Efthymiou and Antoniou, 2013;Ooi et al, 2014;Ligus and Peternek, 2016;Wu et al, 2017;Li et al, 2019), number of bathrooms (Conroy and Milosch, 2011;Ibeas et al, 2012;Larsen and Blair, 2014;Zhang and Leonard, 2014;…”