Welcome to our forum.
If you have 12x18 that's the size I would go or however big you can go. You can never have to much deck space. Maybe you want a side table and a couple chairs or a towel rack or anything. One thing I have learned with decks if you can build it bigger, build it bigger.
12 X 18 is the biggest i could build. Given that i'm just trying to work out how big a tub would be impractible in that space. Difficult to service, place the cover, have room for a few chairs etc.I guess another way of asking is, if i put it in the corner of a deck, how much clearance should i allow between the tub and the walls?
Just got a quote for the Caldera Cantabria $14,350 (+tax) includingcoverstepsbunch o chemsdelivery standard labor (set-up?)cover lifter220v Subpanelso a bit over 15K. So if anyone has any spare change...