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Question DetailsAsked on 6/23/2016

average price to reroute plumbing lines in a house from under the slab to through the attic

3 leaks in the plumbing lines under the slab --will need to reroute. Savannah ga

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1 Answer


Can vary terribly depending on specific configuration - you need to get several bids from Plumbing contractors (your Search the List category to find well-rated and reviewed ones). Going through the attic would be a rarity and last resort in most areas - not only does that invoke issues with freezing of pipes if in a freezing area (and yes Virginia, it does freeze in Savannah - 5 months with record lows below freezing including 4 in the past score or so of years, as low as 3 degrees !), and with the cold water pipes getting hot in the summer which is real disturbing to some people when they go to get a drink or for cooking. Though in your area I guess proper insulation over the pipes to keep them heated by house heat to maintain above-freezing temps could fairly readily solve the freezing issue since it is fairly rare to get below about 25 in your locale. However, personally I hate pipes in the attic - just asking for more in-house damage when they leak - my philosophy is keep them as low as feasible and concentrate their vertical runs over areas like garages where leaks are not as catastrophic, and sometimes (depending on flooring covering) involves less disruption of the house finishes, especially with carpet that can be peeled up.

Usually, one would route them through crawlspace or basement, but sounds like you have a slab-on-grade house, in which case usually one would do a home-run (central line) through interior floors (assuming a multi-level house), routed to demand areas downstairs with risers up to any upstairs demand points. If a single-story house, then routing through the ceiling (maybe what you meant by "the attic") would be common.

As I said, you need bids - but typically for a normal sized house (on the order of 1500-2000SF) you are talking a couple to a few thousand $ for the replumbing part, plus drywall/painting - more info on typical costs and discussions of plastic tubings (PEX) versus plastic pipe (PVC/CPVC) versus copper can be found in previous questions with responses in the Home > Plumbing link in Browse Projects, at lower left.

And in the bids - I would allow bids for both through-house routing (including drywall repair and repainting and any flooring repair that might be needed) so probably need Remodeling - General Contractor bids rather than just a plumber) and also for new lines under the slab [NOT in-slab] or a combination as the contractor deems best - under-slab replacement, with modern diamond wet concrete cutting saws, does not necessarily have to be prohibitively expensive.

Answered 4 years ago by LCD

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