I'd swap the tub/shower and the toilet.

Don't want to see the toilet when the door is open.

Where is the water and drain source?

Are you able to tuck in under the stairs for some extra space or is that a solid wall?

How really horrible is the plan as is ? Moving toliets in a basement are a huge mess and honestly this is abasement bathroom . I see nothing wrong with it is as is , as for seeing the toilet it is a batrhoom and has a toilet really how bad is it ???

I like yours. But it is probably harder to move the toilet than the sink, so why not swap the sink and tub and reverse the door swing?

The toilet would have to be moved for the builders plan. It is closer to where I have it drawn in the first photo. The original owners had the basment stubbed for a half bath. We will have to break concrete for a shower drain.

Jumping in here with a plumber’s perspective. Since you're in the "breaking concrete" phase of a basement finish, you’re at a critical crossroads.

I've seen plenty of homeowners in Ontario get excited about a layout only to realize the "below-slab" reality makes it a nightmare. Since you're already planning to break concrete for that shower drain, you're halfway there, but here is what you need to consider before you commit:

1. The "Toilet is King" Rule

In a basement, the toilet stub is your anchor. Unlike a sink or a shower, which use 1.5" or 2" pipes, the toilet needs a 3" line with a specific slope.

If the toilet is already roughly where you want it (bottom left), keep it there! Moving a toilet even two feet can mean cutting a massive trench through your slab, which gets expensive fast.

Pro Tip: If you keep the toilet where it’s stubbed, you can usually "wet vent" the shower and sink off that same line, saving you from running multiple vent stacks up through your main floor walls.

2. The Builder's Plan vs. Your Idea

I actually agree with you - I'm not a fan of the builder's layout if it involves moving an existing toilet stub.

If the toilet is bottom-left, your idea of putting the shower next to the toilet is much more "plumber-friendly." It allows us to tie the shower drain into the existing main branch with minimal concrete work.

Putting the vanity and a tall cabinet on the opposite wall creates a much better "flow" and keeps the heavy plumbing on one side of the room, which simplifies your venting requirements.

3. The "Ontario Drain" Reality

Since you’re on well or municipal water here, check your backwater valve location. If your basement was stubbed for a bath, there should be a 4" cleanout nearby.

Crucial Check: Before you pour new concrete over that shower drain, make sure your builder or plumber verifies the depth of the main building drain. In some older Ontario bungalows, those basement stubs are "shallow," and if you put the shower too far away, you won't have enough "fall" (slope) for the water to drain properly without the shower pan being stepped up on a platform.

4. Don't worry about "seeing the toilet"

I’m with Patricia Colwell on this one - it’s a basement bathroom. Prioritize the drainage integrity over the "view" from the door. A bathroom that drains perfectly is much more valuable than one where you have to worry about clogs because the toilet was moved too far from the main stack.

My advice: Map out your drains on the floor with spray paint first. If your layout keeps the toilet where it sits now and only requires a short trench for the shower, you’ve found your winner.

Are you planning on a walk-in shower or a tub-shower combo? That will change how deep we have to dig for that P-trap!

Thank you for your plumbers perspective! I figured moving the toilet would be the biggest cost. The designer wanted to hide the toilet from site lines but this is mostly a kids space so thats not important. It's cost, layout and what's least breakable!