Hi, Sometimes constraints are not real. Please reconsider each of your perceived constraints in turn. For example if a window cill is too low to put a kitchen counter in from of it. Then consider actually putting the kitchen unit in that place, but have a step down beyond the counter with a decorative backing board (seen from outside). Likewise reconsider each and every space in your home as the possible location for the kitchen... best wishes

Personally I think you need to bin the idea to put the kitchen there because it divides the space in such a way that there are four areas that have no apparent purpose and are not really big enough to do anything with. I suggest you blank out the kitchen cabinet position and the utility room on the plan and give the blank space to a kitchen professional to show where they would put the cabinets.

So, has the approach to your property changed at some point? Because I would expect your entrance hall and front door to be at the front and not at the back? Could you turn it around again? If not, maybe move the front door to what is now the kitchen, making the kitchen part entry hall and part utility (dividing wall). Then you could perhaps create one large kitchen/diner/family space from the current utility, office and family room. The current dining room could be an office? Obviously all depending on whether all that would be possible re: load bearing walls and all that.

@kazzh Adding a wall as suggested by HU won't allow for the intention of an open plan with the living room as and adding a wall by the current opening will remove a lot of afternoon light from the living room. Adding the laundry to the pantry is certainly possible, it's an idea that has been considered, but we didn't know a) how possible it was to create a new waste pipe and where to run to, possibly the bathroom next door. b) how to position the pantry area to consider a reduced length of waste pipe to avoid a mass of disruption of other units ie cutting holes in them. Moving the patio door isn't impossible, as we can just brick up the current and add a window, then add a patio door to the extension. Thank you so much so far!