A subcontractor sent photos of completed work to clients every day. The client felt progress was real, the team was organized, and they didn't need to check the site themselves. That confidence turned into steady referrals.
I had a subcontractor who was getting referrals like crazy because there's one weird thing he did after every single day on the job. So as soon as the job was finished on that particular day, he just took photos of everything every single day from himself, or it was just his supervisor took a photo. Here's what we did for the day and sent it. Just that simple thing made the client feel like, oh my God, so much work has been done, these guys are amazing, I'm on top of it, I don't even need to go to the site to look at, this guy's on top of it. When you give the client that sort of feeling, you're just going to get referral after referral.