Definitely. My original kitchen was developer’s kitchen —ie, it photographed well but did not function. The only place to put a table in the kitchen itself would have been in front of the back door, which is itself a natural thoroughfare from the open plan living room. Now I have a lovely breakfast bar/peninsula facing the brightest part of the kitchen, and I can easily spend hours there over breakfast, brunch or coffee. Dinner I tend to eat in front of the tv, and when I’ve visitors the main table in the dining room is used.

This is a helpful podcast if you are thinking about what size of kitchen island you want or what to go for: https://shows.acast.com/love-your-kitchen/episodes/exploring-function-over-aesthetics-with-amnda-hughes

once you draw it to scale and position the kitchen and island there isn't enough space for a sitting area ( where you have dining) also it would be too tight to have the sitting area where the kitchen is on the plans. you need walking round space and you would have to have a sofa that is max 2,5 m wide and it would still feel a bit tight. I have actually tested it. Since a first glance yes the idea of a kitchen island looks good. But when you put everything in, you see that it just doesn't work well. I used to be a kitchen designer back in the day and I always hated that most designers didn't consider all elements of the space and how everything works together, but only cared that the kitchen is as big as possible since they get paid commission on the % of the price. Just in case if the kitchen designer was trying to convince you to have the kitchen there with big island. you could have a peninsula if you wanted I don't see an issue with that. If you want send me a DM and I can schedule a complementary 30 min zoom and show you in 3d what do I mean.

Your extension looks great! Your layout has a nice open feel and good flow, but a few small tweaks might help: Fridge Placement – It feels a bit tucked away; moving it closer to the cooking area could improve efficiency. Island Seating – If space allows, making it deeper would create a more comfortable spot for family and guests. Storage – A pantry cupboard or extra drawers in the island could be useful for a family of four. Zoning – Different lighting or slight material changes can subtly separate the kitchen from dining/living spaces. Overall, it’s a solid design just some ideas to fine-tune it!