Before anyone starts work on your home, it is worth confirming two things: that the business holds any licence your state requires for that type of work, and that it carries insurance. Both take only a few minutes to check.
Licensing rules vary by state, and sometimes by city or county. Many states license trades such as electrical, plumbing, HVAC and general building work. To check:
Ask for a current certificate of insurance. The two most common types are:
Check the policy dates to make sure the cover is current. You can also call the insurance company listed on the certificate to confirm the policy is active.
These steps apply whichever business you choose, and they only take a little time compared with the project itself.