I need all of the measurements in the new plan for sure. Moving plumbing is tricky on a 2nd storey .I do not think a bathroom has to have a window but for sure good venting. A closet to me is abigger item than a bigger bathroom I for sure would not do a seperate tub and shower for the master when space is at a premium . Post those measurements please and all of the things you plan also in the drawings.Post all this info in a comment here DO NOT start another post.

What is your budget for this because for such an expensive project you really need to be working with a person of design talent. Either an interior designer or an architect.

This is for sure a very ambitious project, and you'll need an architect to draw up the plans at the very least. The space is not well organized as you have come to realize. The walk-in-closets take up too much space and are not efficient use of the space they occupy. One of the most glaring problems is that you have a walk-in closet in the master bedroom on an exterior wall, which eliminates getting light and ventilation from that side of the house.

I wonder if you use the office all that much? You might consider reconfiguring the space for only 3 bedrooms and no office. You probably could get larger bedrooms and more practical closet space by eliminating the office.

Thank you for all the responses. I realize it's a bit ambitious. We would work with an architect to make sure the plans are feasible.

We originally planned to add an extension off the primary bedroom over our garage but the cost is a lot higher than anticipated. So curious to see what we can do within our current walls.

We do use the office a good amount so we need to keep an office.

Rockybird - I like your drawing. We considered this before moving into the house but being short on time, we decided against reversing the floorplan like that, but it's a consideration. Any idea how much something like that would cost (redo small hallway bath, build out bigger master bath in new location, move around some walls/patch floors and walls, possibly move a window or two)? Is $100k realistic?

Another option is to do a small add-on over the dining room. Something along the lines of the drawing below although I'd try to keep the office a little larger and primary closet a little smaller. Any thoughts on this direction?

I tried to keep the changes to a minimum. Not sure about how the plumber would handle the vent and if you can even move the toilets to these locations. That would require further investigation.

Not sure where you live but $100k to redo walls and plumbing relocating doors and windows would not be enough. A single bathroom remodel runs about $30k - $40k .

Plus, you can't just move walls around - you have load supports that need to be dealt with and plumbing moves on a second floor are tricky.

Rocky bird's plan makes the most sense, since it limits the plumbing moves, but other walls are moving.

An architect is absolutely where you need to start. You can get some directions about the structure first, then start figuring out the rest.

Good luck!

Everything will depend on which walls are structural. You need a structural engineer, an architect and a competent contractor. You cannot plan to move things around without knowing which walls are load bearing. The addition doesnt add much and it will be very expensive. I would only do an addition if you needed space downstairs, and in that case I would not pay for an addtion that small. I would go bigger. Everything is very expensive right now, 100k will not go far. At the least, fnd a competent contractor and tell him what you want to do. He may be able to point you in the right direction as far as costs and maybe even which walls he thinks are load bearing, or perhaps your budget and final plan will allow for overhead beams if walls are reomved.

Ok thank you. We will engage with an architect to see what's possible. Appreciate these ideas and guidance from everyone!

Here's an idea. I tried to keep plumbing fairly close to where it is now, but obviously had to move some fixtures.

Example of cabinet closet on exterior wall with window. I personally would just ignore the window and enclose it in the closet.

Example of tub shower layout