Most contracting firms grow out of small work. They do a kitchen, then a basement, then a whole-home build, and at some point they stop returning calls about a leaky tap or a cracked ceiling. We made a different choice. The small jobs are how we get to know a home and the people in it. They are also, frankly, how the long relationships start.
If you have a list of things that need doing around the house, send it. If it is one thing, that is fine too. The phone gets answered, the quote is fair, the work is done right, the place gets left tidy.