We don't have a flat number to quote here because the range depends on what the hardware needs, not on where in the service area the house sits. A straightforward lubrication-and-adjustment visit on a door with intact original springs costs less than a visit where a tech finds a cable starting to fray or a roller seized in its track - and on housing stock from the 1960s and 70s, that second case shows up often enough that we check for it every time.
What does change the estimate is what we find once the door's open: spring tension that's drifted out of range, hinges that have worked loose from decades of coastal humidity cycling, or an opener that's been fighting a misaligned track for years without anyone noticing. None of that is guesswork we do in advance - it's what the visit itself turns up. If you want an actual number before we're at the house, tell us the door's age and whether it's ever had the springs replaced; that's usually enough to give a realistic range over the phone.