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Question DetailsAsked on 4/24/2015

how much to cut through foundation to add shower drain, tub drain, toilet and bidet?

We are looking at a home to purchase and everything in the master bath has to be moved. The toilet will be moved two feet and the bidet added beside it (two cuts). The tub drain will be approximately 4 foot cut from existing tub drain. The shower drain will be the furthest cut if tied into existing or new tub drain. Or we can enter from the exterior as the shower will be on the exterior wall.

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1 Answer


Here are a few prior questions with answers that might help -

Sounds like you are talking about 20-25 linear feet of cut or so (twice the piping run distance, one cut on each size so you remove a 6-10 inch or so strip of concrete to install the piping- plumber should specify width he wants). The $400-600 range should probably handle the cutting and removal ofconcrete only, getting a specialty concrete cutting company in to do it. Plus the plumber cost and concrete patch.

I would be talking to a plumber for a complete bid on this remodel work - in fact, unless the rest is DIY, a Remodeling- Kitchen and Bath contractor so you have a "real" number that you know can cover it, not a WAG. With this amount of rework, the plumber might prefer to have the bulk of the slab removed in that area to within 6 inches or so of the walls so he can connect based on what he finds in the ground - might well be more direct runs would be better than extending to existing piping which commonly does not end up with the correct slopes because it roseto meet the existing appliance, making it too high to connect to with another pipe and still get the right drainage.

Including the plumber, for the slab work and the in-floor and in-wall plumbing and fixture connections (not including any flooring, drywall repair, painting, mirrors, doors, fans or lights, or tile or vanity or surround installation) I would suspect you are talking $1500 range for the "relocate" fixtures part - plus cost of fixtures and faucets/valves.

Enter from the outside generally a bad idea, especially if you ever get frost in your area - and illegal in many areas. And cutting through the foundation/wall probably more cost and hassle than cutting the concrete slab.

One thing caught my eye - you are putting both a tub and a shower in one bathroom, rather than a shower/tub combo?

Answered 5 years ago by LCD

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