I attempted to purchase admission to Casa Vicens for October 18 on line, but the calendar did not extend to October. What is the earliest tickets can be purchased and are the tickets "time specific"? We arrive in Barcelona on a flight from DC and want to check in our hotel early and get a little sleep before heading out. We could be at Casa Vicens by 13:00-13:30 hr (Barcelona time). How long should we plan to visit there ? We'd like to take a tour, but if need be would settle for a DIY with audioguide.
Each site has its own rules -so to speak- but normally it's 60-90 days in advance.
Obviously depends on your interest in art. Since Casa Vicens it's -mind me- a "secondary" tier when it comes to visiting Gaudí masterpieces, I should assume that either you've been in Barcelona before, hence you already know about Gaudí's work, or else you're very much into art and know exactly why you've chosen Casa Vicens. In either case, I'd assume 45-60' minutes at least.