why 22x28?

My suggestion is to get an architect. You'd need a permit and drawings. It has to marry to your site, to the existing home. This is not your venue for the best result. In fact as the question is now posed, minus any photo, any drawing, and a mystery meat : ) for us? Yup........no help is possible.

Yes an addition and a remodel to accommodate the addition are always more challenging than designing a new custom home because the existing conditions have to be figured into the design.

In addition are all of the oops which are only uncovered and discore red when demolition begins--structual, electrical, HVAC as well as bug, mold and water damage. So have a sizable contingency fund!

Jan is correct; with the lack of information about existing site and house conditions, no one here can help you except to wish you good luck!

You need twice the space, half the ambitions, 6 times the budget, and the services of an architect.

IMO you need an architect anyway so start with one. On here as Jan mentioned we have no idea without detailed to scale floor plans , why the space in particular . I will tell you W/D on the second floor are not conveinent contray to popular belief They are best near the space you spend most of your day. One trip down one trip up when the laundry is done beats the heck out of up and down the stairs all day to load and unload .It also is important to show us how this space will relate to the rest of the house.

Don't feel bad about the basketful of bad designs. Most architects do the same. We create a bunch of unworkable designs quickly, before getting to the one that works.

Not enough info. 22'x28' doesn't say much....22' in which direction? 28' in which direction? Where will the tie in to the existing house occur? Do you need a hallway? Etc.

We are adding on a 33'4" wide by 34'8" deep addition onto our existing house that includes most of what you're aiming for (master bedroom, duel master closets, master bath, large laundry room, and an ensuite bath and walk-in closet for our daughters' bedroom). That space also includes a hallway.

This book might give you inspiration, and inspire some fruitful conversation with your builder and/or architect. Your proposed size is definitely large enough for what you want.

https://www.motherearthliving.com/green-homes/not-so-big-remodeling

Not a pro.

But I believe that you can have two walk in closets and a laundry area -- lot size permitting. How depends upon what you now have and how you want/need to attach it.

You could create a relatively short hallway between the existing home and the new addition to add a washer and dryer in one end and an exterior door in the other end -- you're creating a back door - a mud room -- to your home. Then, on the long side of your master bedroom opposite the entry door, create a door in the center of that wall and walk BETWEEN two walk in closets to get to the master bath.

A sketch of what you have would help the pros here be a lot more specific.

The best plan for you would take into account things like whether you and your spouse get up at different times e.g. whether you need choose clothes and use the bathroom while the other spouse is still sleeping. The best plan for you won't necessarily be the best plan for a different couple. You might find this discussion interesting.

https://www.houzz.com/discussions/5138010/walk-in-closet-vs-nice-built-in-wardrobes-in-new-build-in-houston

And another mystery OP that never appears again to remark on anything.

Didn't get the answer she WANTED. ? Probably, Mark scared her : )

Something that complicated? And expensive? Without a design professional involved? How much money are you wanting to lose? https://www.remodeling.hw.net/cost-vs-value/master-suite-addition?y=2019

Good point. I thought I have a starting point, at least, for a designer.

I apologize for taking so long to get back. (My mom has some serious health issues and needed my full attention for a while.) I have done more sketching and tossing, but I finally have something that I can post. I appreciate your comments and look forward to any suggestions you might share. I confess I was surprised when I actually had feedback since I didn't have anything to show you. I hope to post something tomorrow. That you again. pat