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Question DetailsAsked on 10/13/2015

cost for basement bathroom with no rough ends with sump pump

The pipes are on the ceiling of the basement, so I need a sump pump with a grinder. I just need a bare minimum full bathroom. How much should I budget for this.

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1 Answer


Not sump pump - a sewage grinder lift pump - very different critter. Whatever you do, make sure the outlet pipe from the pump rises well above the line it is discharging into and is vented properly - far too many of these installation end up siphoning from the main sewer run back down into the basement because of improper installation.

You need to get a layout done for bidders to look at - Architect is usual one for that, and likely to need plans to get a building permit anyway. Architect can also do a preliminary project cost estimate for you before doing final plans.

Cost depends on quality of construction of course (linoleum or marble, for instance) and size, but commonly runs about $5-10,000 for a very small half bathroom and $10-30,000 range for a full bath. A significant cost factor is where you have to go to tap into utilities and whether new electrical runs need to "home run" back to breaker box and whether it has enough capacity or not.

Remodeling magazine says nationwide average costs (depending on area) are in the $30,000's to mid $40,000's for normal construction 6x8 new bathroom, and up to $75-100,000 for high-end, though undoubtedly some of these were bumpouts or part of new additions rather than converting basement space so maybe a bit high for your case.

Answered 4 years ago by LCD

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