Peeing when nervous or excited

Hi, My Springer Spaniel pup (17 weeks) is pretty well house trained, has attended socialisation classes, puppy classes and is booked onto advanced puppy classes in September.
We chose him as he was one of two VERY confident pups in the litter.
My problem is that he insists on peeing whenever someone comes to the door, someone speaks to him. He meets another dog/pup. We try and get him onto the patio whenever we think this might happen (only because it's easier to clean). We don't scold him. My wife thinks he'll just grow out of it, but it frustrates the hell out of me.
Can anyone give some advice or light at the end of a very long tunnel, please?

Yes just ignore him, by that I mean not ALL the time, but do not make eye, verbal or body contact on FIRST greetings, play it very cool.

If you tackle this correctly it will disappear, the dog cannot help it. It is just over excitement.

Very common & yes they do grow out of it - eventually. Best tbing you can do is ignore it. Hes only a baby & as such hasnt got full control of his bladder. If he picks up
On your frustration, it will make matters worse. Just turn off & ignore

Willow (5 month old welsh springer) used to do this. She was a little different, she'd bounce up to people, throw herself on her back and pee herself, wagging her tail like mad all the time.

I spent some time sitting in the town centre with her, just sitting still, and letting people go past, either ignoring her (which totally confused her) or fussing her. After a while it becomes less exciting and she peed less (either that or the bladder ran dry!).

When she started being less enthusiastic about people and more "I'm bored mum, when are we going" I rewarded her with fuss and treats. She doesn't pee herself anymore (except on very exciting occasions).

I don't know if this would work for you. If he only pees in the house can you get someone to repeatedly come to the door until he realises this is a normal boring thing to happen?