Could you post a to scale floor plan of the new space planned make sure you show all measurements , plumbing if not moving and also all windows dooirways etc clearly marked in a drawing that can be enlarged .I can't actully understand what you are wanting from this largr addition since your original bedroom seems a good size but hard to read the meausremelarge nts and honestly I would save the money and just reconfigure what you have . Do you actully think you will use a tub or just think it is a must have? What you will have the size of many apartments where a couple can live comfortably. How large is your home now? I have a bedroom , walk in closet and bathroom in 450 sq ft and is more than big enough with a ton of clothes , a king bed and full bathroom with tub/ shower so no idea wht would improve that with another 500SQ ft.

Is this plan more helpful? I wanted to have a tub because I love taking baths, and have been living in a house with no bathtubs for the past 10 years! My husband wants an additional closet because I am currently using up all the space in the master closet.
We thought about just taking some bedroom space and expanding the bathroom and closet into the bedroom, but then thought that would make the bedroom kind of a long-and-narrow shape that’s a little weird. We also wondered if the bedroom would feel too small if we did that (or if future buyers would think it’s was too small for a master bedroom). I would also lose my little “corner” of the bedroom that currently serves as my “office” if we did that. But, that idea is still in consideration.
The plus to expanding with an addition is that: #1: Since we are renovating the house at the same time, we could match floors etc easily. #2: I would definitely have enough space to give myself some kind of little office nook. #3: adding square footage should add value at resale. #4: We could probably even take some space from the old closet to build a hall closet and a place for the AC unit so we could move it down from the attic.
Anyway, those are our thoughts, but we are not pros and don’t do this all the time. That’s why I’m reaching out to see if anyone had any advice or layout ideas. I’ve seen some people post really helpful ones on Houzz before. :)

Sorry, I meant to post this pic.

If the pool is existing, especially in-ground, that may dictate somewhat how close your addition can be. Also the roof layout (and elevation design) may be better with a smaller footprint width than the existing 22'.

The 22x20 addition would make a disproportionate Master Suite compared to the rest of the house's room sizes. So either right-size the addition based on space planning, or if you are stuck at that size maybe fit some other uses into it: a pool entry to a powder/changing room, a pantry, separate laundry, etc.

Here is a rough idea that might work. The space at the top of the tub would be shelves for towels and so on. The side on the bedroom could be shelves also. That way your bath entry door would open against the wall instead of the tub.

The master bath would be about a little over 9 feet wide by 17 feet long. The closet would be 7 feet wide by 17 feet long. ( except for the toilet room that takes a chunk out of the closet if you want a toilet room)

I would make the hallway at least 42 inches going to the bedroom and keep the sliders to make the hallway open feeling.

I would also make a separate laundry room and utility room if possible and add the closet off the hallway for coats.

You would probably want to rearrange the bedroom and windows for your desk.

Wow, thanks for this idea!!

@3onthetree I am seeing your point (and Patricia’s) about the size of the addition. I could downsize the addition. The pool placement is not a problem.