Hi Sophia, I think the floor is the most important thing as it won't be changed once it's down, paint it relatively cheap. The best advice I could give (based on my recent experience) is that if you put a cool grey floor in a room that's filled with sun it's fine. If you do the same in a North facing room it can feel gloomy and cold and then you have the option of taking well known advice for a North facing room which is 'opt for warm, creamier colours for the walls'. Well this doesn't work too well with grey floors, it can look sickly. Therefore, the floor is a consideration at this point. There is a gorgeous tile from Topps called 'Sculpt' in beige which is the very same colour as warm concrete and it has an amazing look to it. General advice is to avoid cold greys in North faicng rooms and opt for yellow based neutrals. I have used Skimming Stone in my kitchen (North facing) but it's got lots of natural wood. Off white and Shaded White are both recommended for North facing rooms. https://www.madaboutthehouse.com/choosing-the-right-shade-of-grey-paint/

Sorry- I don’t like your plan. In my opinion the space between the sink and hob is where the work happens so you are actually a bit tight for space. I think the door from the kitchen to the playroom is a massive fail- firstly you are inviting the kids to run past the cooking area, secondly is splits the kitchen and there are safety implication for having a walkway through the kitchen, I also think it makes your kitchen plan feel disjointed. I also think that if the children are young they won’t want to be in the playroom, they will want to be where you are. If you are worried about the playroom being dark this is easily sorted with better lighting and a pale coloured floor. Alternatively make this the grown up room and the kids playroom near the front door. I also think that putting the sitting area around the corner in the extension makes it feel enclosed and a little tight because of its location. I think you have put too many stools at the island and in reality people rarely use more than 3. In my opinion better to have fewer comfortable seats that are spread out with room to eat. I also think you missed an opportunity to have a cupboard near the front door to hide coats, shoes and a vacuum cleaner. I think that if you want an extra shower it may be easier to put this off the bootroom- a bigger utility/ bootroom area may help later to keep sports equipment/ dogs/ ironing etc etc out of sight. There is a privacy argument to put it where you have but I suspect the wall you have moved to take a corner off the kitchen is a job that will require a steel.

Great overall floor space but the plan would benefit from some amendments. I would keep the utility room especially as your garage is detached. The design will give you a gloomy lounge so lose the office to give it some natural light coming in from the front of the house as well as through the internal bifolds separating kitchen from lounge. I agree that the play room may soon become redundant so relocate the office there. With the extra room in the lounge (or the bigger office space), incorporate some clever storage for toys etc. Include a door from lounge to current play room for easier access to the toilet. I might be tempted to pinch a bit of play room space to extend the toilet area and have a small lobby so you always have 2 doors between lounge/play room to toilet. Remove the door from play room to utility and have extra utility units. Install a sliding door from utility to kitchen. I would also remove the door from the living room to the playroom. Good luck with the build.

Is this a bungalow or house as I’d think of easy access for laundry if the latter? Could option B work but push the loo wall back a bit and lost that awkward alcove created in the bedroom and use it for slim storage in the bathroom? You could have a long run of laundry units on the left wall and coat cupboards etc on the right hand wall as you enter from the hall I’m not sure if the bedroom is in full time use but is it being ensuite critical? Jack and Jill bathrooms can also create awkward moments!