IMO a huge fridge and a tiny cooktop make no sense at all.The huge DR also makes no sense unless of course this kitchen is just for show and you have caterers. The walk from fridge to sink is bad design . Does the builder not have a KD on staff? If not get one now ideally an independant designer but that might not be possible with the builder . You need to provide us with more info . Corner cabinets IMO always a bad choice and in a kitchen this size I would esign with no uppers and for sure none on the sink wall. We need some more info for sure.

"most efficient layout"

That definition will vary considerably and is subjective. Many on this forum have their own ideas of how a kitchen should be laid out and believe their way is the only way to design a kitchen!

I have a similar sized kitchen and designed it based on the previous kitchen I had owned, which worked for us. It would not meet some of the "rules" pushed by some on these forums. It works for us and that is all that matters.

Have you not lived in or owned houses with kitchens?

What did you like or hate about those kitchens? Make a list.

Use that list to design the "perfect" kitchen for your family.

Some other information might be helpful too.

Is this your only dining area or do you also have a formal dining room?

Is there a walk-in pantry near the kitchen? How big? It would make a difference in how many uppers you might, or might not, want/need in the kitchen.

Are you using the 42" Sub-zero french door fridge?

It definitely isn't a "huge" fridge!

I have that fridge, but would have gone with the 48" model if it had been available when we built in 2021. It came out just after we had already ordered everything for the kitchen.

48" is a standard fridge size over several brands, but the 42" size isn't.

For resale, for this size kitchen, I suggest you go with a 36" cooktop.

Thank you. Yes we are considering the 36 in cooktop for resale. I appreciate the advice.

We do not have a formal dining room and no caterers. This was just a rough layout from the architect with the understanding that we would modify the layout details. I quickly became overwhelmed. It is just my husband and I with an influx of 6 to 10 more people at the holidays . Also, no walk in pantry.

Are you already building and needing to fill the space allocated for the kitchen, or maybe you are still designing.

Custom home?

Show more of the plan so we understand the flow and what rooms are where.

How do you cook?

What do you cook?

How many will be cooking at one time?

Who do you cook for?

Show the rest of the floor plan.

Nothing lives in isolation, and certainly not a kitchen

As above? Not great

Show the whole living floor, please.

Don't start over , add it in comments below.

Here is an extended view of this floor. We are using allocated space for the kitchen.

It is a poor layout, IMO. You need a designer.

The one comment I would make is what you do with the island. As shown, it is just one big slab. Consider adding a bar height counter for eating, using bar stools that will tuck under. When you are using the island for preparing meals, the counter will block the view of stuff on it from the dining table. Stools tucked under will also make the bar a serving counter.

Have you laid out scaled furniture in the great room? The room isn't so large when you have a main "hallway" through it to get from bedrooms to the rest of the house.

Your natural light is going to be dim, no matter the exposure. the kitchen with window at sink, will be dimmed by adjacent garage wall and even the "flex" wall.

The great room will be dimmed by covered porch......

I hate to "dim" your enthusiasm, but, it's what I see.

What do elevations look like? Location/climate?

Has construction started?

You first have to work on the "bones" of the house, to make sure your Kitchen will be designed with the house as a whole. The rest of the house does affect the Kitchen:

• The first thing that stands out, that you realized too, is the dead space between the proposed Kitchen and Dining. I would add that the width of the Dining is overly aggressive for the house - it is wider than the Living Room - and is what is contributing to that dead space, because it makes the Kitchen oriented left-to-right. So, in a future scheme, say you made that "sliver of the house" skinnier, that would make the Kitchen more oriented up-to-down and extend it towards the Dining.
• As chispa noted, you need to lay out furniture in the Living Room and determine if any walls are focus walls. That could affect the wall separating it from the Kitchen. Note orient furniture to how you prefer with the vault, and consider circulation for the exterior door and pathway through/around the room.
• The Flex Room has direct open physical and visual access to the heart of the Kitchen. What exactly will this be, with the odd shape and small size, yet to remain open to Kitchen? Should that connection be celebrated rather than just to pass through an unassigned or dead space?
• The backhouse area (Powder, Mudroom, and Stair) seems to be related too. First, the Powder is very close to Dining and visually accessible to Living/Dining/Kitchen when it doesn't need to be. The Stair, which might be a heavier-traveled function, is accessed too far away. The Garage, which has ample storage room, has opportunity to steal some space by a variated shape. So, in a future scheme, say the Stair/Powder/Mud/Garage was manipulated and there could be room for a walk-in Pantry and storage for things other than coats/shoes.
• I see this plan is fixated on perfectly symmetrical portions of the front elevation, with what appears to be 2 main gable fronts. That is just a choice, but what it does is makes the middle connecting "sliver" (the Kitchen/Dining) more important so it doesn't get lost. I would suggest that a 3D model is created to see how far back the Kitchen wall is read in the entire massing, considering the front porch roof would make that wall appear deeply inset. So, in a future scheme, say the wall comes forward, and the Dining exterior wall moves with it, bringing the Porch more in line with the Patio and connecting the outdoor living spaces better, which might also clean up the access to the spaces and how they interact with the circulation around furniture.