The short answer
What does a building business need online?
Nobody hands a reno or a build to a phone number. Before they call, they want proof: jobs you've finished, the kind of work you do, where you work, and an easy way to ask for a quote. Your website puts all of that in one spot and loads fast on a phone. That's where people check you out, usually standing in the room they want torn out.
It also answers the questions before your phone rings. What you take on and what you don't. Whether you pull the permits. How a job goes with you, from the first walk-through to the last sweep. Every answer on your page is one less call that goes nowhere, and the people who do call already know what they're getting.
Your truck and your card get you noticed. Your page is where people make up their mind. So it should look like your work: solid, clean and finished. For general contractors, builders and renovation companies, here is what that looks like: websites for contractors.