Does anyone actually play the piano? If not move it out of the room. If yes can you move it to the "awkward space"behind the "awkward door", I hope it wont hinder access to the 2 light switches in that corner. Can the door near the armchair be made to open outwards instead of inwards into the living room? If yes then move the piano to that area instead repacing the armchair. Once piano is out of the way try and see if dining table can be rotate to fit in that space, if so you will have gained some space in the living area. Get rid of the fireplace and mirror and wall-mount the TV in that position. Will allow TV to be seen from seating position and minimise glare or backlight in case you open the windows in the dining area or in the sitting area. If you placed the piano in the armcahir's place you can keep the current sofa and its configuration. Move armchair to current TV console position. This will create a centre area for kids. It would appear to me your kids are quite young. You might consider investing in a thick heavy rug to place in the central place area. For side tables i would suggest nesed sidetables which you can keep in one area and remove and use as an when needed. (inserting an image later) If you moved the piano in the awkward space. I would suggest investing in a new slimer sofa or instead in a series of discrete seperate armscahirs whcih can be moved about easily. Oh and too maximise space i would have gotten rid of the table based lighting and preferred wall mounted ones. Similarly wall fixed shelves rather than tables, especially with babies to avoid the risk of things being pulled over. (one of the other reason i would suggest wall mounting the TV rather than getting another console).

I think the choice depends on where you intend to place the door furniture. Some builders will insist that the correct placement is as shown on the white door. Since this ugly, non traditional position is uncomfortably close to the doorjamb a handle should be used as a door knob runs the risk of grazed knuckles. If you choose the more traditional placement shown on the striped wood door then I prefer a knob and rim lock as shown

I agree that the space between the sink and hob is dangerous and this kitchen is divided by the back door. But there are many many ways this could be planned. Have you considered using a concept planner to help you visualise the layout?

I would like to do als indicated in the picture above. You see the location of the TV stand & sofa. I am having a hard time to avoid the living room door ( red) en toilet door (green). The idee is to have enough space for the TV stand. floorplan nieuw situation