This has me a bit worried. When we bought our house the guy we bought it from had flipped but house but the longer we live here the more we notice the short cuts this guy took.

I appreciate you sharing this information. Thank you so much.

Flippers often are not pros and make huge mistakes so of which can be huge $$$$ to fix.

The price of proper subfloor plywood alone is $ .62 per sq. im thinking cancork is a bit on the light side or working way to cheap. :)

Leveling isn't always about plywood. A quick bit of SLC (self leveling compound) can be $1/sf (this is rare). A new subfloor that requires both new plywood AND cement leveling = $4/sf (and more depending).

It all rests on what is needed and the labor to do it. The range I gave is the FULL range (super cheap, quick, easy fix with a little of this and a little of that; right through to removal and replacing underlayment + leveling compounds = days and days of work).

A couple of bags of SLC + a little labor over 1500sf = $1/sf. Shot blasting a slab and adding 2" of concrete over 1500sf is a massive correction. It all depends on the original issue and what is needed.

Depending on the job and obviously slab vs Lumber as others have stated.. as well as if im using bagged levelers or A bonded mud screed.

If i look at cost of a basic floor leveler such as RS Levelquick from CBP. It is avg $34/bag +/- . At it's thinnest allowable application of 1/8" thick it will cover 50 sq ft at best. This equates to $.68 for only the material alone pre tax.

We have not yet demo'd the existing floor we havent yet prepped and primed the floor nor have we even drove to pick up the materials which can also include perimiter expansion foam and prep materials to contain the perimiter from overflow, primer etc... Then we need mixers, proper mixing buckets/drums, proper spike guage spreading rollers etc. it goes on and i havent even looked at the jobsite location yet!

I am typically charging around $60 per bag for self leveling floors over a slab( prep labor/materials and leaving a clean jobsite......) If it is over a joist system there may be way more prep work and carpentry involved and self leveling over lumber is a major risk. It can get expensive quick.

We arrive at a cost by measuring the floor for level and computing a total bag yield while taking into account the jobsite and all the other materials ill need as well as labor.... usually comes to around $60/bag -best