Local cost snapshot
Standard plumbing service call
$110-$200
LA labor runs higher when traffic, access, and same-day dispatch are part of the job.
Drain clearing
$150-$375
Repeated clogs deserve scope questions, because camera work or line repair can sit behind the initial clearing.
Leak detection
$225-$700
Useful benchmark when the source is not obvious and the work starts with tracing, not repair.