Cost to repair a floor damaged by a leaking toilet?

Question Icon
Posted by: from Ottawa
1/23/2016 at 11:48:38 AM

What would it cost to repair a floor damaged by a leaking toilet?

This would involve fixing the leak and strengthening the floor. Access underneath is via the open basement ceiling.

Only looking for cost at this time.


User Icon
Date/Time1/23/2016 at 2:05:03 PM


How many sq ft of flooring do you currently need replaced?

Would you require removal and disposal of your existing floor and what type of flooring would you need it changed to?


Colin Pereira

Falcon Flooring Carpets and Tiles

User Icon
Thomas from Trusted Trades in Cambridge
Date/Time1/23/2016 at 6:25:45 PM

Hey Frank,

Really varies to the extent of damage to the subfloor and the true cause of the leak.

It could be as simple as a flange gasket break and minor damage to the floor. Which in my eyes could be as little as 600 to fix the leak and restructure the subfloor.

Obviously laying down tile or a new unerlay or finished flooring would at cost to that. But I believe that would be your lowest starting point. Damages to the flange coukd result in plumbing replacements by a licensed plumber.

*Side note* I've seen some bad jobs where people haven't secured the flange down properly repairing a job like this.. Leaving the homeowner with a floating toilet and sometimes resulting in another leak.

User Icon
Date/Time1/24/2016 at 1:23:27 AM

All depends on the amount of damage caused to the floor and what your plan of action is either to repair the floor or replace the whole floor. It could be worth it just to put down a whole new fresh floor cause mold cold be growing from the water You should have a floor guy life the floor and have a licensed plumber fix the leak to assure it done right. Cost could be anywhere between $500-$1000.

~ Beach One Flooring

User Icon
Date/Time1/24/2016 at 9:28:21 AM

Hi Frank,

We have run into this issue numerous times and our repair technique has to vary on each one but only slightly. First if the toilet is leaking then typically its from an old wax seal that is past its life or from lack of support under the toilet causing excessive movement. It can be a combination of both or even an old or faulty toilet.

The cost of this repair varies from $400 - $500 for removing the toilet, lifting the flooring, cutting & removing the subfloor around the toilet, replacing the subfloor, adding in additional support and reinstating existing flooring, toilet etc.

If the flooring is anything but vinyl then the cost may be slightly more. Further if the floor is tile and toilet is not re-usable plus mould damage to areas other than flooring the cost could be upwards of $1,500 - $2,000.

So best case scenario approx. $400-$500 and worst case approx. $2,000

We have done this repair many times and you have a big advantage of the unfinished ceiling below the damage area which makes accessing the issue much easier.



User Icon
Date/Time1/25/2016 at 6:59:35 PM

The chain of events would be to remove the toilet and begin to rip up the flooring around the toilet, down to the sub-floor to determine the extent of the damage. Any section of damaged sub-floor should be replaced. Depending on the floor covering it could either be repaired or potentially replaced. This question has numerous variables depending on your type of flooring.

Search the TrustedPros directory and discover the best contractors in your area.

Find your home service pro
Great renovations start with a great contractor.

Since 2004, TrustedPros has been helping homeowners find the right contractor for their home improvements and repairs.

Post Your Project

Within hours you'll be comparing offers from top-rated professionals. It's free to post and you're under no obligation to hire.

Trustedpros Inc. does not warrant the accuracy, completeness, safety, legality or usefulness of any Content, or Whether Content is Current and up-to-date, and TrustedPros Inc. Shall have no liability whatsoever with respect to your use or reliance upon any content or for content being removed or otherwise ceasing to be available. Please refer to the terms and conditions of use of this websites for more details.

Get Free Estimates

Post your project and compare offers from top-rated pros.