This dataset contains the results of numerical simulations performed to estimate the seasonal coefficient of performance (SCOP) of a magnetocaloric heat pump for the built environment. The SCOP is estimated based on the heating demand of a well-insulated house in the Netherlands. These results were published in the International Journal of Refrigeration 164 (2024) 38-48. The simulations were performed using a one-dimensional numerical model of an AMR implemented in Python.