So the bit in the light blue circle looks like a cupboard, perhaps with a stacked wachine machine/tumble dryer in it? (good idea if so). But do you mean just past that cupboard, ie along the left hand wall as you come into the kitchen? If so then yes you absolutely could put the fridge there, it’s just going to be a bit bulky as will stick out further than normal units, and you may feel it’s in the way a lot as that’s your main way in and out of the kitchen. Also it wouldn‘t be able to go right in the corner, it would need a slim unit to the left of it so you can open it fully. So that would push it further towards the island and again that means it’s blocking the main walkway more. You could however push the island further towards the garden than shown in the plan, which would mean you have more space in that entrance area, and then it is more feasible to have the fridge along that left hand wall, as people can get past. Anyway, there are certainly options, it’s just worth planning the kitchen layout and checking it all works ergonomically before you commit to the window! As regards kitchen units under side return: you can have wall units or tall units under a side return, it depends how you make the roof. It’s true though that most people prefer to leave that wall clear of wall/tall units, usually that’s where a dining table or sofa goes. Here are some pictures of side returns with tall or wall units under. The first one looks the neatest as they have the roof part glass part solid and have tucked the units under the solid bit, but I suspect they have an unusually wide side return:

Considering the size of house I feel the kitchen is a bit tight- you decide to wait until budget allows you to eat into the garage. If you are mindful to stick with this floor plan consider putting all tall units where you have the hob….. this has the advantage of giving the illusion that the space less long and therefore wider- I think it would be easier to use the space of the fridge was closer than on your plan. Separately I don’t think there is a problem with a hob on the peninsula- they are made from toughened glass and so I should worry less about the hob getting damaged than safety- consider if your children understand that boiling pots can scald. As long as you are happy you will be making the same choice as many as putting the hob on a peninsula is a popular choice

Thanks for the feedback. We prefer having more natural light in the kitchen and being able to look out at the garden when washing up to keep an eye on our children. Currently everyone walks straight into the area where we cook and it’s very dark here so the preference was to move the cooking area to a space with more light and more space for preparing

Translations please 🙏