I would think that it ranges from $.05 to .08 cents per square foot. The type of facility really makes a difference, plus the amount of foot traffic. Regular office cleaning (i.e. cubicle farm) will be the easiest. Outpatient medical facilities (non-surgical doctors clinics) will be 25% more time consuming to clean (assuming you will do more sanitizing and disinfecting). Surgical medical facilities are a different story - many are open 24/7 so they usually have their own staff. Of course the floor maintenance, carpet cleaning, and window cleaning are excluded from this base price. I think smaller buildings are much easier to bid. I just give them a initial cleaning price based on sq. footage and then after I have cleaned it once and know it's intricacies, I will give them a set price. I like to clean it first before committing to a firm price, and I'm not going to clean it for free . I like to have the wiggle room to negotiate. Charging too much is not good as it will lead to someone coming along and stealing your account. And charging to little is bad because you don't make enough and are more likely to cut corners... which will lead to customer dissatisfaction and losing the account.