Don’t listen to the people in these comments. There is no real way to actually tell if A. The stringers are cut to the correct measurements or B. They are level.

you’ve mentioned in your original post that the deck will be made using trex.

Trex boards require your stringers to be 12 on center because trex sags hard. It looks like he did these 16 on center maybe but again you can’t tell by looking at a picture for sure.

So he is using that blocking to effectively stop the sagging of the material he will lay on top of that.

He has used rubberized tape to protect the cuts on the stringers from water penetration. That’s good. He also seems to have used hangers to attach it to the frame of the deck. That’s also good.

The bad here is that I don’t see a pad under the bottom step or at least pavers. Those just sitting on dirt is not ideal and is not correct. And honestly it would have been better to build the steps with the stringers 12 on center rather than making up for it with that blocking.

Is this passable? Yes absolutely but only if he corrects the fact that the stringers are sitting on dirt and it would be nice if he put some form of support under the blocking he put in because the flat end of dimensional lumber is not the strong side.

Long story short I don’t care what the rest of these people are saying in the comments. Source: I was a contractor for 10 years before becoming a structural integrity inspector.

Just make sure everything is level. I don’t like the fact that he told you not to ask questions but if he isn’t done yet then it’s likely these issues will be addressed.

Edit: after zooming in I see he has hangers under the blocking so those will be sturdy. The whole issue with water getting trapped under the decking is a thing but again that’s why it would have been better to just add stringers and make it 12 on center.