3.5 Apartment in Zurich K3, looking for a 4.5 or bigger

We have a very charming, 3.5 apartment centraly located at Schmiede Wiedikon in Zurich. As the family is growing, we are looking for a 4.5 (or +) place preferably in K3, but flexible for further options in K2, K4, K6. Our flat has 3.5 rooms, one separate kitchen, one bathroom with a bathtub, 2 balconies (one out of the kitchen and one out of one of the rooms), wooden floors, one attic storage room and one basement storage room, dishwasher, 3 built-in closets. If you would like to get more details about the flat, do not hesitate to contact us!