maisonette 120 sqm on two levels: a) ground floor 80 sqm, consisting of a living room, kitchen, one bedroom and a bathroom, b) first floor, 40 sqm consisting of three bedrooms and a bathroom.the maisonette has a basement of 80 sqm. it is heavy preconstruction. access to the basement and the first floor is made by an internal staircase.heating method: individual oil boiler