Many builders or when homeowners ask for basement plumbing rough-in they just show the approximate location and the plumbing stub-out is done without actual bathroom layout. In many cases like this when I did basement layouts for customers with already stubbed-out plumbing the concrete floor needed to be cut and plumbing adjusted or moved due to the wrong spacing.

Do what @Mark Bischak, Architect suggested, get an architect or a contractor to layout your basement, and hopefully, the bathroom location and plumbing stub-out have the right spacing to accommodate the bathroom layout.

Good luck.

Thanks for the advice! We will be definitely hiring an architect later on when we do finish basement in couple of years. However, I can’t really bring architect into the building as of yet and decision needs to be made in next couple of weeks.

Understand we may still need to break the concrete later on, but are there any check lists or questions I need to ask builders to ensure we minimize the labor when we do finish basement down the line?

Thank you!

Make sure they ran a vent for the ejector pump and stubbed it out between the basement ceiling and capped it in the attic so all you have to do is make a connection in the basement and through the roof.

Other than that you can take a ruler and approximately layout a bathroom use strips of cardboard as wall plates to see if everything pretty much has the right place... as an example, if you plan an inline bathroom you need a toilet stub-out to be 12" from the back wall and min 15" from the side wall or any fixture... if there is a wall I like to do 18" from the wall to give more room and if your walls fall within that dimension near the pipe when doing a layout you don't have to break the slab for the toilet, next if the vanity you using is a 36"W - 21" deep you want that pipe to be in that vicinity I marked them in red and that stub-out is usualy a 1- 1/2" pipe, do the same for the shower size you plan to have and same thing, that stub-out is usually 2" pipe, if you plan to have a tub that would be a 1- 1/2" size pipe.

This is an example just to give you an idea to make sure pipe locations will work if you have an inline layout.

Good luck

Make sure they ran a vent ...so all you have to do is make a connection in the basement and through the roof.

Easily overlooked in a tract build.

(Still using diaper insulation, I see.)

"We will be definitely hiring an architect later on . . . "

What are you going to have the architect do? Paint?

😅

Meant later on when we are ready to finish basement.. hire architect to discuss layout, etc.. What’s your problem?

It may be best to determine a layout sooner than later. There may be alterations to the plumbing that could create a mess that may disruptive to those living in the house while basement construction/alterations are being done. Just trying to help you avoid problems in your future.

Thanks for the advice everyone, greatly appreciate it!