Even if the LA are involved, doesn't seem they enforce much. Just sold a house that was built mid-nineties, turned out the developer never got the building control signed off. They just sold it and vanished.
Buyers solicitors picked it up. Ended up getting the inspector around 15 years after the event to sign the property off. He turns up with a list of outstanding items, which I then had to put right before we could get a completion certificate.
Quizzed the guy why they didn't enforce the sign-off, he just shrugged his shoulders, said we're very busy you know...
...wanders off to check porch...

