It varies drastically, based on what level of cleaning is required, and what area of the country you are located in.If thereu2019s not a lot of mess, and thereu2019s nothing that the tenants are leaving for the landlord to have to haul away, then a pro wash down of everything, including the carpets could cost a landlord as little as $800 u2022 assuming thereu2019s very little patching needed, and you have half a can of paint left over from the last time you painted the place, and only need to touch up.But say you had someone who smoked in the place u2022 when they were not supposed to do so. Depending on the level of remediation required, that will generally run you anywhere from $5,000-$15,000 to return it to a non-smoking apartment, for a 2 bedroom, 1,200 square foot unit.A forced air heating system means youu2019ll need the ducts scrubbed out, if you have asbestos flocking (u201cpopcornu201d) on the ceiling that you have to clean to get the smoke smell out u2022 then you are talking some serious dollars: $3-$7 per square foot of removal is about average for a contractor to do asbestos removal. So add another $3,600 to $8,400 dollars, if thereu2019s that.This is all prior to you even being able to patch and repaint, or even rip out and replace the carpets u2022 which you typically need to do before renting the place.And God help you if you try to repaint over the smoke smell, instead of actually cleaning it: the smell will not go away, and will end up seeping out, meaning expect to only be able to rent the place for 70% or so of fair market rent until you pay to clean (if you can even get that, which you probably canu2019t, from a non-smoker or an asthma or allergy sufferer). Proper cleaning will require stripping that new paint off the walls first.