We are in dispute with Tutor Perini on Third Street Light Rail project in SF and wanting to find out if NOC has been filed.
There are a couple of services that can do this if the NOC is recorded. You can also consider a public records act request, but those can be a little slow.
What services?
Bica National Construction Services is one. You can also just go to the County Clerk's office and look. Finally, there's a civil code 8190 that says the Owner needs to give notice of the NOC to people that filed prelims, there are some exceptions to that rule.