There are serveral markets for Janitorial. Try a local insurance broker in your area, Hartford, Safeco, and Allied, etc are good markets.
You need a commercial general liability policy.
Commercial General Liability Insurance.
620.00 every yr
Depends on the country, state and local regulations that the business is established in
You will need to contact an agent(s) for a quote.
Probably $500 - $750 annual for general liability.
Contact a good agent, they will be able to assist you with this, if they do not sell the type of insurance you require they will more than likely know an agent that does.
You can add the new business to your existing policy. The cleaning company would not be covered until you add it to the policy.
It may not be a requirement of the company you are cleaning for to have liabillity insurance but it will help you get more jobs if you do.
You need to contact an agent to get an answer to this, there are so many different coverages, limits etc.
Yes
GL or General Liability