No opinion on size, but do take a good look at the tines in your new dishwasher. I got a Bosche a couple years ago, and that piece of trash has the worst layout ever -- it only holds about 2/3 as much as the dishwashers I've had in the past. I hate this thing.

My wish for dishwashers is that the racks be interchangeable across brands and models!

A 24" Miele G5000 series has well designed capacity. Run it when you want and how full it is isn't important. An 18" version cleans the same number of items on a daily basis. Extra pieces from guests doesn't point to another dw. Put the to be washed pieces in the laundry room to be out of sight until you can run the additional loads. A single bowl main sink is the more common choice.

Aisles and hallways could be wider, imo. The clearance where you have two seats and the frig run is much too tight. You can pull some inches from the bathroom if you make that space smaller.

The lighting locations are too many for ambient lighting. Task lighting in from the edge of counters offset at work zones should be on the plan. 450 lumens at the counter minimum.

I would be looking at a drawer style rather than ever installing an 18", especially two.

Unsolicited of course, but everything is related to everything. Your lighting is not providing for counter tasking. The snippet of a plan in general looks like there are opportunities for some great improvements.

sorry @Theresa Peterson about your feelings toward your Bosch. I love mine, it's so quiet!

as far as a smaller dishwasher, it really depends on what you wash everyday. just a few cups and plates, smaller, yes, but If you are already handwashing large pots, why not just hand wash daily.Do you have a substantial sink?

Love the idea of a dishwasher for the barware. Yes a smaller size for the Bar.

I would consider 2 18" dishwashers. Why not? I am going to consider 18" for my remodel. A 24" just never gets filled for me. Is that a scullery kitchen? Maybe there should be a dishwasher in there instead of at the bar?

I know you only asked about dishwashers, but I think your plan could use some work. The aisles are narrow, especially behind the seating. The island top will have a big seam going through it since it is larger than a slab size of most materials. Is that laundry in with a ref/freezer? I would want some sort of doors closing off the laundry and would want it separate from the pantry. Does that need to be a walk through? What sort of cooking do you do? I am not seeing any decent size sections of countertop to do your prepping on. It would be interesting to see what this plan looks like in 3D. That will probably help you more to see what is happening here.

Good luck !

“Never fill the 24” suggests that you’re thinkng about efficiency. Looking at two random 800 series Bosch dishwashers, 18 and 24 inch, the usage differences seem near negligible to me:

- cycle time ranges are identical

- water usage ranges range from .4 gallons less in the 24”, to .9 gallons more in same..Perspective: At worst the difference is equal to about 30 seconds difference in a showet using an eco 1.8 gpm showerhead.

- The 24” uses about .2 KwH more energy. Likely a difference of a few pennies per cycle, depending on your local electric rates.

None or this seems remotely worth it to me. Unless you specifically want two dishwashers in different locations for some reason.

edit: the above comparison is from their ”normal” cycles.

Empty nester, who has been living alone since my husband passed away in February. Dishwasher is a 24” Bosch 800. I throw everything in there, including pots and pans…pretty much anything I cook with, eat on or with. Leaves me with virtually nothing to wash by hand. Many of these items take up a lot of space, especially in the lower rack. So, while many of the tines are not used, the large items justify a wash.

There’s a setting for a 1/2 load. That’s what i use most of the time. All comes out clean.

3ft 3 aisles? Yikes! That is narrow. And if that is not measured from countertop to countertop then they are even narrower. Is that a washer and dryer in that area behind the kitchen? How does it vent? The aisle is only 3ft 2. Will the washer and dyer stick out further than what you show in the plan making that aisle narrower? You will need room for the actual dryer vent hose. I would rethink this entire plan to allow for wider aisles.

Many dishwashers now let you run cycles for top rack or bottom rack only. You may want to look into a model that does that. Or do a regular dishwasher and one drawer washer that you can use daily. Place both by the sink as this is where your dirty haul will go. A drawer washer with with a regular drawer below. That bottom drawer is a great place to store trash bags etc. Do cabinet redy front on the drawer D/W that way it won't even look like a DW and blend seamlessly into the kitchen.

another quick note on the island, you’ll need some sort of tool to clean the center of it bc it is so big, if you shrunk it you could get better clearance in your aisles

My first thought for you was a drawer dishwasher. The problem is that they really don’t seem as reliable as conventional dishwashers. If you get a good one you’ll love it. If you don’t it will leak from day 1. Consider getting one good 24” dishwasher and call it a day. Save your creativity for the layout!

I wash nothing by hand but knives. I throw everything in my 24" dishwasher and run it daily, even if it is half full. Dishwashers use such little water and energy it just makes more sense of my use of time and impact on the environment to have a 24" and run it this way.

I see little need to have a second dishwasher to just do glasses for when you have company. It seems easy enough to carry them on a tray to your normal dishwasher.

Darbuka, my condolences on the loss of your husband.

I entertain a lot and honestly think 2 DWs is overkill. I up until this move aslo ran a catering biz from my home with one Bosch DW 24" with a quick wash cycle . As for the quality of Bosch mine I just left was 18 yrs old not one issue and often did 6-8 loads a day. It takes less energy to wash 1/2 loads that to was by hand start using the DW you have and really you do not need a 2ns DW but you do need a much better kitchen designer

3'3" aisles, seating in the aisle, 2 dishwashers that are 2 steps apart and an almost 6' x 8' continent in the middle of the kitchen? How are you going to wipe down the top of that thing? With seating in the way making for an even more impossible task? Major, major problems with this plan.

Unless you have very, very long arms, no island (or peninsula) should be any deeper than 5' (60") in at least one direction. Why 60"? Most people can comfortably reach around 30". This means to reach the center of the island without climbing onto the counter it should be no deeper than twice 30". You will need to walk around the perimeter of the island to reach the entire thing, but that's not usually a big deal. (I say "comfortably reach" b/c when wiping down a counter you want to be able to have a firm grip on your dishcloth to be able to firmly wipe, not barely holding on with your fingertips.)

Regarding aisles -- if there are appliances, counters, workspaces, etc., behind the seats, 54" is a better aisle width. It allows someone to be sitting at the counter while someone else is accessing/using the items behind the seats as well as provides enough aisle space for people to pass by seated diners without having to ask them to move. If there's nothing behind the seats but a blank wall, then a 48-inch aisle is fine behind the seats.

Minimum work aisle widths with no seating are:

• 42" if only one person will be working in the Kitchen at the same time
• 48" if more than one person will be working in the Kitchen at the same time
• Note that aisle widths are measured to/from the items sticking out into them the farthest - appliance handles, counter overhangs, etc.
• Look at your layout - note that the 3'3" measurement b/w the island and refrigerator is b/w the refrigerator box and island - not the refrigerator handle. This means that aisle is likely 3 to 6" narrower than you think they are. I can't tell if the island staring point is the cabinet or the counter overhang (it should be the counter overhang).
• Unfortunately, most builders & contractors and even many Architects don't understand the Best Practices/Guidelines for Kitchen design. They don't have to live with the results, so they don't worry about it, especially if the client is insisting on something. (They don't want to lose a client if they push back b/c the want is not good design.)

Since the range (or cooktop/rangetop???) is in front of the island, consider moving the main/cleanup/big sink to the window wall and the prep sink to the island. You don't have enough room for a cleanup sink in the island, but just barely enough for a prep sink. You should have some space on both sides of the sink to minimize splashing water on the floor.

Another option is to move the range to the exterior wall (easier/cheaper venting) and keep the prep sink on the same wall so they're along the same wall.

Is this also your future "forever" home where you plan to age in place? If so, think about accessibility as well. E.g., having the prep sink and range along the same wall would allow you to "drag" a pot of water across a counter if you develop arthritis and it's difficult to lift a pot (or you start losing arm strength).

Don't separate the DWs, if you go with two. Just b/c you plan to not use one unless you have company, doesn't mean someone won't put something in it without telling you (e.g., SO or visiting "child").

I strongly suggest re-working the layout, but it's up to you.

ETA aisle width minimums.

Been a few days so maybe no more help needed.

"We never fill the 24” in 1st home and I like to run it daily."

There's no reason to run a dishwasher that isn't full. It just results in higher costs for energy, water, detergent...and effort.

According to the Energy Guides of several Bosch 24" and Bosch 18" dishwashers, the estimated energy usage of both size dishwashers is the same. There's no reason to spend more money for two 18" dishwasher (in addition to the additional plumbing costs and the loss of lower cabinet space) than for one 24" model.

My design book recommends 48" corridors between cabinets; your design includes corridors as narrow as 38 inches. Two feet between each barstool. Nineteen recessed lights seems excessive.