I guess you can never have too much space with 4 children, I can imagine how I would use the existing living room and dining room :-). Few questions - is that an opening from the existing dining room to extension? what is the dotted line section on bottom left of extension next to kitchen? are you having an island? I'm not sure about having all the kitchen units down the left hand of the wall, 10m is a long way to walk to get some from one cupboard. I think its better to have kitchen 'contained' in a section of extension, then you can create a zone for living and dining space.

Those measurements for the sitting/dining don’t look right. It appears to be a much longer narrower space. My view is you will ultimately have to extend to get a good sized kitchen. Extending it into the narrow end of the sitting/dining will be very narrow and with the door into the conservatory not much usable space. For now, live with it and save up for your dream extension.

One option

Hi Rebecca! There are many ways you can achieve an open plan kitchen/diner/lounge within this floor plan. The best arrangement for you really depends on the details for how you would love to use that space. For example is it primarily going to be a cosy family space where you all hang out in the evening, where kids do homework, where you play games together and watch TV - in that case perhaps the location of the TV is going to be critical to the layout, or is more of an entertaining space for big informal get togethers and you'll use one of the other rooms for film watching and computer gaming, or something else. The way you use it and the details and preferences that you have for those uses will really help you to define it and make sure its right for you. There are lots of things to take into consideration to get it right. The same is true for the kind of "leftover" space. What uses do you need to accommodate in your home alongside the open plan space? That will help you to decide what is the best way to configure those spaces and what to turn them into. You'll find my free Design Your Home Vision Checklist useful to help with getting more clarity about the way you want to use the space and how you need the space to be so you can get it right for you and enjoy your home to the maximum. You can get the checklist here: https://www.i-architect.co.uk/dyhvchecklist.html Best wishes for your home redesign Jane x eco-home architect www.i-architect.co.uk