A straight door swap on a French Valley garage - same width opening, no structural surprises - is a single-visit job. Add a new opener to that same visit and it runs longer but still finishes the same day.
Where it stretches is custom sizing or finish. Since French Valley's wider double openings sometimes call for a size we don't carry on the truck, that job splits into a measure visit and a separate install visit once the part arrives. We'll tell you upfront if that's the case rather than let you assume a one-trip job.
We don't post a fixed hour count because every garage carries some variable - how the old springs come off, whether the track needs replacing alongside the door, how the opener wiring was run originally. What we can say is that the newer, more uniform openings common in a 2009-era build usually go faster than an older, settled house where nothing is quite square anymore.