They said it had an issue in that the small 30x25 2 bedroom house had the center of the house sunk about 4or 5 inches.

If it's possible to alter the grade of the land or improve the drainage, and the house only got an inch or so of water in it, that house may escape flood damage next time. 

2-3 inches.. the ceiling is not straight .

Most manufacturers charge the same price for any sizes up to 101 unit inches, which is the width + height.

I have a rental and I am wondering if I can depreciate mulch, gardening soil, annual flowers and perennials? 

The index inched higher for the fourth consecutive month, demonstrating the upbeat outlook in the construction industry.

If its just the area right around the old screws, you could go back a few inches and find solid particleboard.

If it wasn't sitting under water for a day or two, you should be fine just cutting the drywall off a few inches above its peak. doors etc should be able to be cleaned if they were not under for longer than a day or two.

(It is a 3 story building and this garden unit was legalized with the rehab permit & plans under which things are being done)Existing drywall appears to be half inch (so we are off by 1/8th of an inch) and it was never touched so I thought it can be left alone but now they want to cut it and check the thickness.Since they demanded that I tear down the entire ceiling to put 5/8" drywall per code, I suggested if I can keep the Half inch drywall and just add another layer of 5/8" inch which would make it much thicker then what they demanded.

However, this is just one code regulation to look at.An insurance carrier or lender may require the bottom plate to be bolted every 12 inches, usually 6 inches deep.