This particular project is a little different (and probably faster) because if I'm not mistaken they're not going below grade much at all for parking. I walked by the site today and it looks like they're installing drilled piers for foundations. In general I'd say a few months for foundations, then get the tower crane installed and then about a year to make it look like a completed building from the outside with the interior still in different stages of completion. If the building is structural steel instead of all concrete it generally would go a little faster but I think this project has a concrete elevator core (or two) so that concrete work takes time. (It's also possible to have a steel plate core like the US Federal Courthouse near the Greyhound station which is generally faster to build but they're not very common around Seattle.)