Hi. Wow, it IS beautiful, like a big sculpture or piece of art, but such a waste of storage opportunity. I would have to seek the advice of a kitchen designer/cabinet maker or two who can make recommendations about the best way to redesign it for your purposes and quote the cost of doing so. Is it possible you can post photos of rest of your kitchen so we can see the whole space as far as how much storage space you already have and how it is configured? This will help others who are much better at coming up with other solutions. Oh, and your polished concrete floor is lovely too. Cheers!

Also, it looks like the largest cabinet opening is for a fridge...is that correct?

I agree with that. It's lovely timber though, and would be good to retain/reuse same in better layout. Is there a seperate pantry? I ask as it is hard to tell from photo. Can you get your hands on the original drawings to see what else besides loo resides behind that wall, and if it is dead space from under-stairs? This will help you to see if there's space that can be utilised, and how much space is available to reconfigure.

I'm re-looking at it, and wonder if the powder room runs lengthwise and parallel to cabinets? If so, then there may only be the depth of the existing shelves available to use. Even so, as long as there are no services, ie. wiring, plumbing, etc to run interference, that space seems deep enough to serve your needs. In this case, open shelving might offer the most space for storage for dishes, pots, pans, etc, if you don't mind having all on display. Otherwise, some shelving enclosed with doors would hide away those things you don't want on display. I hope this is helpful to get you thinking about possibilities. As far as costs, a kitchen designer/cabinet maker is best to answer. I'm sure others will be along to offer input and suggestions. Keep posting, as this is quite an interesting Dilemna. :)

what's in the rest of the room?.is this the only storage for the kitchen? could this cabinetry be used for other storage with a few added shelves to retain the original concept but do you like it enough to ignore the wasted space ..is there enough kitchen storage elsewhere...post some photos of the whole room including a floor plan with measurements showing how the toilet fits in and a description of what you need to store

Okay, thanks for that Mariliane. That helps a bit, although can't make out dimensions, but I can now see the powder room is directly behind the space and runs lengthwise. So your available depth is limited, but it appears there is ample room (provided no unseen obstacles) to incorporate shelves all along the timber wall. I looked at your Ideabooks and see you like pull-out pantries. It doesn't look like there is enough depth to have them, but there certainly is for shelves. I guess one benefit to them being relatively shallow is that supplies will be more readily accessible. It may even be possible to design a clever pull-out step system to enable you to reach the highest shelves. I also looked at your Kitchen Reno photos and am wondering if the Reno has already happened and this is to be a further project, and were you thinking of doing it yourself? I will look for photos that might help give you options if you like.

I also note you have great staircase that may provide additional storage opportunity. Pull-out pantries built into the 'dead' under-stairs space is an option, as are file drawers, and a study nook to name a few possibilities. i realise this may not be for everyone and may not be for you, but there are options if you are needing them.

Some photos from Houzz for inspiration.