Sure enough, there is a slight gas odor in the kitchen.

No harm no foul you are good, you get all money owed to you.

They can use a chemical on it to help get rid of the odor.

Entering basement definitely has an odor.

Can I withhold any of the security deposit for painting/carpet replacement if there is significant odor from cigarette smoke?

There wont be a 'legal document' showing what you are doing is legal, there is state real estate law, and most agents cry foul because they think you are 'earning a commission as an unlicensed individual' when in fact you are earning an 'assignment fee' or 'proceeds from the sale of a home' (assignment and double close, respectively).2.

When they moved out, I had to put in $2K of new carpet, after I painted every floor with Killz to because I could not get the odor out I finally painted the walls too because the smell would not go completely away.

No harm, no foul, no goverment funds, no loss of receipts of any bank. :)

Next working with people who may have the monetary capacity to save money and buy, but can't due to some credit issue, like a past business and personal bankruptcy can be just the type of person that gets and can afford an attorney 3 or 4 years later claiming foul.

" When we bought the home Dec. 17 it had a pet-urine odor in 1 of the bedrooms where we decided we needed to replace the hardwood floors in order to remove the smell.