Post the plan and reasons why they wish to make the change.

Not as important as having a functional kitchen.

Can you post a plan that is to scale in both directions?

Here is the plan with the 2 ft extension.

Sounds like the builder or one of the subs made a mistake and rather than spend the money and time to fix it he wants you to authorize a change in your kitchen floorplan. I wouldn't want the double oven next to the pantry in your floorplan. JMO.

If you are planning to use your breakfast room as your dining space and use the interior room as a study - I like the double ovens where they are as they give a visual barrier to the kitchen counters (which can get cluttered when entertaining). Also, moving the ovens to the pantry side will make that end of the kitchen visually heavy. So, for me it’s not about the centering of the hood as much as the whole look. I personally would not authorize the change.

Moving the ovens beside the pantry would improve aesthetics, IMO. I like that the kitchen would be more open to the breakfast area and that the light from that window would not be blocked by the oven stack. However, it will not improve function, but obstruct it. By moving the cooktop to the left, it puts it infront of the DW, which means it will be difficult for a helper to unload the DW while the cook is at the cooktop, due to the open DW door. If you could extend the length of the island, that would be a good decision, but the corner of the great room wall is too close.If the island can be extended while keeping at least 36" at the pinch-point, that might work better than the original layout.

I don't think it matters if the cooktop hood is centered on the FR or the island, as long as it's centered on the cabinet run (uppers are the same width on each side).

Often, advice is given not to center the cooktop with the sink, because workers at each will be back-to-back. Since most prep is done beside the sink, I don't think that matters as much (again, my opinion). So, in the first plan the cooktop and sink are m/l centered, oven is at the end, and unloading the DW will be easier for a helper. If the cooktop is moved to the left, unloading the DW while someone else is cooking will be trickier (for the cook, who will have the open DW door behind him):

Sink and cooktop centered, cabinet added on the end:

You might consider adding a window at each side of the cooktop/hood, to allow natural light in the kitchen:

ETA, one more, with wider windows:

A stove being off-centered from an island should not be an issue. It is the overall workability of your kitchen that matters, and how all the parts fit together.

There are a great many more important criteria for kitchen design than aligning the range and hood with the center line of an island.

Don't stress out.

When you added two feet in the living room, did the fireplace get moved to keep it centered in that room? They might have moved your stove to line it back up with the fireplace. That being off-center is a little more of an issue aesthetically.

Basing a kitchen design on the fireplace and island lining up is just silly, specially when they are around 30 feet apart. That symmetry will only be noticed when standing in one small spot of the floorplan. The fireplace should be placed in the correct spot for the family room and the island and range should be placed in the correct spot for their use in the kitchen.

You need to talk to your builder asap and tell him what you want.

Yes, the Fireplace is centered in the room.

Too funny, I know I‘m probably overthinking this.

Your builder owes you a new plan showing how this 2' extension effects both of these rooms.

I'm borrowing Mark's phrase, "studies have shown"...!

Mark B are you anywhere near all the flooding?

I should know better than to read Mark Bischak's and Virgil Carter's comments while drinking a beverage. About half the time, I almost spew on the laptop screen.

I was traveling from Traverse City, Michigan to Detroit, Michigan on US-10. At the west Sanford exit, the sheriff had the highway closed and everyone had to exit. While at a standstill in traffic, I heard the annoying emergency sound on the radio followed by an announcement that all residents of Midland (I was in Midland) south of US-10 (I was south of US-10) and east of Eastman Road (I was east of Eastman Road) should evacuate their house and head for higher ground immediately. I sure was glad I was not a resident of Midland.

I did cross over a few bridges where the water level was almost as high as the road surface, and I passed a park where a picnic pavilion had water up to its eaves.

I wasn't worried, but then again "He who can stay calm when others are in a panic, obviously doesn't know all the facts."

The stove hood has nothing to do with the island.

Now that I had a chance to see a map of the road closures around Midland and pictures of the flooded areas, I can see I was in a little more danger than I thought. Several of the roads I drove on are closed and/or under water. Glad I didn't stop at that rest area in Clare to use the bathroom.

Glad you are safe brother!

My range and hood will not be centered on the island, the center of the range and hood are left of island center by 30 inches.

The Midland area is mess, whole lakes are gone and remade in other places. Very sad.

Back to the discussion, if you lived in Midland Michigan, a waterfall edge on the island would be appropriate.

If there's no other reason for them to line up, then it's not important. At one point, our plan had a custom hood going up to the peak of a gable, so we thought it had to be symmetrical to the fireplace chimney across from it. We've eliminated that hood design, so the range can go anywhere. If you don't have to be centered on a gable, it can go anywhere.