I'm hoping to do something like that. I'm going to try having the mw in the corner area first - if that doesn't seem to work out then if/when I redo the kitchen i'm thinking of putting my oven 'up' a bit at the end of the cab run (see first pic below taken of a dw set up at my local Lowe's) - with the mw setting on top of it. and when I saw cotehele's cabinet on here I saw what I think I want over the mw and going up the wall - the right side of her cabinet shown below. She has what looks like a little toaster oven/mw on it also. I think I'd want glass doors on the top part for a display area. It would be rather similar to what is actually over the dw set up at lowe's. cotehele's cabinet

Oh, the microwave, the microwave. Things could have changed since I shopped last summer, but I recall that only GE makes the slim 12" deep one. I didn't like the idea of having only one company making a product that I was building in a cabinet for. In the end, I did want a bigger one anyway. I would try to carve a place where you can put in at least a standard depth microwave. They can wear out so quickly. Otherwise, this is like building a spot for a 27 inch stove you found somewhere. Also be aware that the microwave needs room for air to circulate around it. I don't know if that vent pictured above is enough venting. I have seen people build these tight little openings with little possibility of air return. If you want a tight niche, then you need to get a microwave with a trim kit. Finally, whatever you buy, look at the actual microwave instructions, and if using, the actual trim kit requirements before finalizing your shelf plans. And of course, your electrician needs to know the location because microwaves need their own dedicated circuit, I believe everywhere in the USA. I have two ideas for you to help fit your microwave. Idea 1: Need to check with your Carpenter/GC if this is possible: Sometimes, you can have the carpenter frame out the front of your sheetrock and basically build a small niche 3 more inches deeper to help add space. It may depend whether you have a load bearing wall. Idea 2: Do a bank of cabinets floor to ceiling with both ovens next to each other and a counter to the left or right of it for a landing space. Just make the whole thing deeper floor to ceiling. This is what I did. Don't know how it works in your entire kitchen plan. You could have your main oven instead of the drawers I have.

It comes down to space and money. I have a small kitchen but decided to go with a microwave drawer because I didn't want OTR microwave and I didn't have sufficient counter space for it to live on. Having it OTR is very much a compromise - it's not as good as a dedicated hood would be and it also is a bit high for comfort if you aren't tall. I suspect that it also is subject to premature aging if one does a lot of high heat cooking. My ideal - if I had space - would be to stash the microwave in a cubby with a pull out landing strip below and have it at optimum height but the configuration making the most sense was under the wall oven. FWIW, based on my research Sharp makes all the microwave drawers which are then rebranded so there isn't any particular reason to pay for the "name". As others have posted, you do want one with the tilt out controls because otherwise you would be obviating the ergonomic advantages since you would have to squat to read the controls.

@acm I hadn’t thought about into the sunroom then out the side. That would be easiest, but would mean two bends. I’ll have to look into that. For wall cab plans, If you can make out my very hastily (not to scale) drawing. We have one hanging cabinet planned between our front door and window and an easy reach corner wall cabinet (the kind that wraps around corner, not angled) in the corner next to the range. The picture with the MW on the metal shelf is where that first wall cabinet would be and I agree that is the best spot. I’ve liked it there. It’s very accessible, you have a place to set things when you take them out. Its close to my cooking area but not right in it. This morning I told DH we absolutely could not hang a MW under the corner cabinet. It’s such a bad spot. You can’t actually get in front of things in that corner. I can’t imagine trying to pull hot things out of a MW from to the left or right of it. That does sound dangerous. He has agreed to put it in the wall cabinet that corresponds to where I have it now, but only if it can be inside the cabinet. The cabinets are shaker but he is definitely throwing in some craftsman elements and he really wants to try to get that uniform look that you see in craftsman furniture. This has been really hard because our space is odd and in order to make it work symmetry has had to go out the window. He is wanting to try to make the uppers as uniform as possible. I’ve done lots of sketching trying to figure out how things will work. Here is one when I was trying to imagine how to make the microwave not look completely out of place there above the range ending at the window. I just could not do that to my satisfaction. A hood will not only be more functional but it will look so much nicer in that spot. Here I adjusted a drawing to make the wall cabinet have an open shelf for the MW. He doesn’t like how that it would make our only two wall cabinets no longer match in style, which I get. I’m not super excited about the idea of having to open a door to use the microwave, but I’ll do if I have to. I’ll work on him some more first and see if I can get him to come around to either an open shelf or a built in. GE does have a smallish MW that can be built in or hung and would fit on that shelf and we decided to make them slightly deeper to accommodate a MW more easily. Since our prep areas are under the windows the deeper cabinets won’t affect us. I could hang it under the cabinet but then I’d have to move my coffee pots and I really like them there. @kaseki I hadn't thought to try that, though the MW is currently in a box. I was going to call GE however since its been decided to put the MW in the wall cabinet, no need to figure it out I’ll just sell the MW. Thanks for the tip about wind direction. I’ll keep that in mind.