What is the price range for janitorial services done for your average office building?
Typically in Phoenix the janitorial services charge by the square foot of office area. I have heard between 10 and 55 cents per sq foot per week. The higher prices also indicate that more servcies are performed or done more regularly. Larger office area pay less than smaller office areas.
Try looking up your local janitorial services, and other nearby resources for such information. After all, the information that you find will only be helpful to you if it pertains to office cleaners in your area. It's probably a good idea to talk to the cleaners in your area yourself. your best source for any info is Google
According to the most recent disclosure to Congress from the White House (see related links for the document), there are 487 White House Office employees. Not everyone actually works or has offices in the White House, many are located in building near by such as the Eisenhower Executive Office Building. Unfortunately this list excludes the President and Vice-President and also the myriad of support staff such as stewards, chefs, janitorial staff, security, mail room etc.