What type of license do you need to start a lawn care business in WA?

You will need a business license from the city hall in the city you are based. The cost is about $100. You will also need to open a business checking account so your customers can pay you by check in your company name. I would also recommend a liability policy in the event you accidently damage a persons property like a rock flys out from a weedeater and hits someone's car etc.