We had HW floors in the LR/DR/Hallway of our bi-level house. When we reno'd the kitchen, we opened up the wall between the kitchen and the then DR (it's now our LR, we flip-flopped the DR and LR after the kitchen reno). We had "matching" white oak laid in the kitchen, and they "weaved" it into the existing HW in the adj room (10% of the old floor taken out when they did this?). It looks terrific. In addition to the (natural color) white oak floors, we have Golden Oak stained balusters, railings, door jambs, doors, and windows (pine stained to match the Golden Oak except for the kitchen window which is stained to match the surrounding cherry cabinets), a natural Black Walnut DR table and matching buffet with floating shelf above, and lightly stained cherry cabs in the kitchen--I promise you, they all play very nicely together and it's not too much wood. :-)

In Ontario any homeowner can submit their own drawings, however, they will be reviewed by the planning department to ensure the drawings meet code. However, a professional I,e, draftsman, designer, architectural technologist etc must complete and pass exams and thus obtain a (Building code identification no) BCIN. An architect does not require a BCIN, however, they must be licensed in the province in order to have construction drawings approved. Some further explanations http://www.andythomson.ca/2016/11/15/why-a-bcin-is-not-an-architect/

I'm sorry, but there are so many things wrong with this plan beyond the layout of the master bathroom. For example, the living room is virtually impossible to furnish due to the diagonal circulation path. Given the limited size of your bathroom, would you consider omitting the trendy free-standing tub and replacing it with a shower? And replacing the free-standing tub in the small second bathroom with a built-in tub/shower?

You have: WARM travertine tile on the first floor. You have DARK warm wood cabinets. You have WARM countertops. The LAST thing you want sitting next to that BEAUTIFUL WARM coloured stone is gray. No gray. Nothing in your home says "I need gray to make it perfect". Nothing. Your furniture will change. Your area rugs will change. Your wall colours will change. They will all change inside of 15 years. But your PERMANENT stone or tile floors will STAY. If you must use a tile next to stone, I suggest working in the same tones. You can go darker or you can go lighter but stay inside the SAME TONES as the travertine. If you REALLY MUST HAVE GRAY - then rip out the travertine and start again. Gray and peach stone/tile do not like to play nicely together. It screams out, "I didn't want to pay to do it properly." I would recommend finding MORE travertine in a different sized tile and add it in at an angle (diagonal install). You can find a stone that is either a little darker or a little lighter. You can then add a decorative boarder to the rooms where you are installing it so that it looks like you did it on purpose. This is a great way to add more of the high-end stone to a space that already has high-end stone. But please do not add gray in with peach. They just don't like each other. Flooring snobs, like myself can see it right away. We KNOW when something has been done piece meal. We also know when someone did the piece meal NICELY vs. someone who did it without a thought to the overall look of the floor. Compliment the stone you are keeping. Let your area rugs turn the space gray. That trend is quickly dying. It makes sense to throw out a rug in 3 years. It doesn't make sense to rip out a tile floor in 3 years.