Arrives in a well-maintained vehicle. The contractor should arrive in a well-maintained vehicle. Often it will be a truck. Age should not be a criteria, although pride in appearance is. Look for the company name and logo, and the CIA logo.
Bids Get a written bid.
The professional contractor should provide a written bid. Every aspect of the job should be described in detail, with a dollar amount attached to it, as well as warranty terms and a scaled plan. Usually the more detailed the bid, the more professional the contractor. Remember the lowest bid isn't always the best. You want to choose the best bid based on all factors.