From the center line of the toilet to the wall - 15" is the minimum distance.

Okay- understand that is the minimum. Layout is a shower opposite a toilet and sink. Shower wall is 5'-2" and wall with toilet and sink is 8' - these are interior dims. I haven't seen any small bathrooms with this layout so I'm a bit worried about it but I'm trying to trust the architect on this one. Seems to have okay clearances. I might be able to change it at this point- this hasn't been framed yet.

good point- I have two young boys so there is a definite need there! I will increase the space around the toilet in their bathroom- it was only 15" on each side.

In our last home we had 16 inches between the center of the toilet and a wall. I felt it was too close. I would try to do at least 17 inches next to the wall, maybe 16 if need be next to the vanity.

So funny- it's a brand new house that had few size limitations and now I'm seeing the bathrooms are really tight. Unfortunate to have to redesign but at least I caught this before it was framed. Just a few more inches was all we needed!

If this bathroom is for the boys, I absolutely would not do pocket doors. Pocket doors are good on rooms where the doors won't be constantly opened and closed.

As to your question, 15" might be fine now, but what happens when they reach their teen years and suddenly you have these two hulking males in there?

It also doesn't look like there's enough storage.

That plan isn't showing the bathroom for the boys but the boys bathroom has not one but two pocket doors in an jack' n 'jill configuration. I can increase the area around the toilet in the boys bathroom by a few inches and lose some storage space and I already did this.

This bathroom (the plan above) is off the my office/studio. I would have to take up office space to increase the spacing around the toilet.

The toilet in the only bathroom downstairs also has 15" on both sides - 15" to the tub and 15" to the vanity. The vanity is 34" so perhaps this width can be reduced and we can gain some breathing room.

Thank goodness the master bathroom has a whopping 18" on both sides of the toilet.

Do you have fat or large family members? My sister can't use my half bath. I believe that it is 15" o.c.. The full bath is much more spacious, at least 18" o.c., and you really do feel the difference.

Adding a grab bar can also be a problem when the toilet is very close to the wall. Some mobility solutions for toilets become unusable with tightly spaced toilets. Have you seen the riser that sits in the bowl and adds several inches in height and then has arm rests on the sides? You could never use that with 15" o.c.. Neither could you place a commode chair over the toilet very well.

15” is really tight. We went 18”, and 20+” in our one enclosed toilet area.

Recommendation: The distance from the
centerline of toilet and/or bidet to any bath fixture, wall or other obstacle
should be at least 18".

Building Code Requirement: A minimum distance
of 15" is required from the centerline of toilet and/or bidet to any bath
fixture, wall or other obstacle. (IRC R 307.2, IRC P 2705.1.5,IPC 405.3.1)