A Hot Tub or sauna can be placed anywhere outdoors, even in densely populated areas. The foundation on which the tub or sauna stands must be stable, and can be built using either a wooden frame, concrete base or a compacted gravel bed. The hot tub cannot be placed directly on grass.
Plan in advance, it should be comfortable to step down into the bath, and also to get out again. The edge of the tub ought to be placed around 30-40 centimeters above the floor of the terrass. If the edge of the tub is flush with the floor of the terrass then it might feel like stepping into a well and a rail for support is reccomended. Consider ways of emptying the tub when integrating it into a terrass or similar.
Hot tub sunk into the deck. In this tub it is easy getting in and out again. The heater with connection pipes is placed on the outside of the deck.
Insulated hot tub with stairs integrated into the deck.
It also works to simply place the hot tub on the deck thanks to the integrated stairs.
Lowering the bath into the deck is a popular configuration.