There is far, far too much wrong with THIS plan to be corrected here. This is not an internet question in any scenario. It's difficult to avoid the word "horrible, so I won't, it is horrible. Get an architect. Now.

It was done by an architect.
Overall what is the worst thing about this plan

It’s not horrible at all. There are some bits I would change. It would be nice when you enter to have a great vista through the house to the windows at the great room. Could u remove the walls separating kitchen and dining which block the view from the front door? It would suggest a coat closet be added near the front door.

The take away then, is go back to the architect ( or another if you found this from another source) . Much can be improved for better flow, sight lines etc.

The best way is a sit down with an architect , and a need/ want list. Not all dilemmas have an online solution:),

Jan Moyer is right. Get an architect (get a different one if you hired this architect). I see by the measurements and floor names that this is not a home being
built in the US. Perhaps there are traditions in building in your
country that we don't have here. Nevertheless, here are my thoughts:

(1) I think I'm seeing a bidet in the powder room. I mean, really?

(2) There's an L-shaped wall in the middle of the hall by the dining room for no apparent reason, unless it's structural, in which case, make it a column of some sort.

(3) There's a second kitchen, labeled "scullery", (do you hire a lot of caterers?) right next to the laundry room with no doors or other separation.

(4) If you do hire a lot of caterers, any cooking in the "scullery" is going to impact the aroma of your freshly washed clothes.

(5) The scullery/laundry area is the same size as the actual kitchen. That's a lot of space for an activity that I suspect you will not be using on an every day basis.

And that's just the first things I see on the ground floor that don't make sense to me.

Looks like this isn’t a house here in the US *because* of the bidet in the powder room and the scullery, typical for some countries and cultures. Or maybe bringing different cultural traditions to build a house here in the US?

The measurements are all in metric which doesn't meet building codes in the US, but good point Fsal. Many cultures have strong taboos surrounding how bathrooms are used and acceptable standards of hygiene in that arena, but I just can't imagine a bidet in a relatively public bathroom.

Yes this is not in the US, though if you mean the guest toilet that you call 'powder room', that's an eastern pan not a bidet.

Hello, AR M! Glad you have cleared up my confusion about the guest toilet, but I am unfamiliar with the term “eastern pan”. Could you tell me what that is?

- In the master bath, the windows are only for the WC.
Perhaps consider putting the sinks in that area and WC elsewhere? Where is the light/air more important to you?

- That is a huge! Walk in closet - almost as big as the bedrooms. Would it make sense to split it into 2 closets? (His and hers)

- Bedroom 2 is long and narrow, layout seems bit awkward for me. Also, will it have enough sunlight?

- how do you envision using the family room and study upstairs? If the study is office for the adults - would it be better suited where the family room is so you dont have everyone walking past it as they go up/down the stairs.

- Depending on who does the family's laundry - would it make sense to have laundry room upstairs with the bedrooms where most of the laundry will be created and put away.

- The namaz room - I assume this is for prayers?
There is a lot happening near there - with the garage, front entrance/hallway, bathroom. Would it make sense to have it in a less busy/quieter area of the house.

- Do you expect the guest room to be in use often?
If not, would it make sense to switch the layout so the bathroom is in the front and bed is in the back area.
If bathroom is in front and also have entrance from hallway, you could possibly eliminate the guest bathroom?

- you have a lounge and entertainment area - How are these spaces to be used? They both seem to have seating area - is this redundant? and the entertainment area has a lot of open space as well.- what goes on there?

- Also, if you dont mind me asking - why the 2 kitchens?

I realize this is not in US and some of my suggestions may not make sense with your cultural norms. I hope you are able to get some useful info here on houzz.

Good luck with your project.

Hi J P

Thank you for constructive comments, it will last definitely help me streamline this design.

The kitchen definitely needs to be redone, the spaces are too big

The entertainment area is more for outdoor cooking and barbecue.

Will rework the design.

Thank you!

Thank you AR M for the information. It is wonderful that you are quite literally "building in" tradition for your home.