Swimming pool/spa integrated structure

A method of constructing an in-ground swimming pool of the type which is prefabricated as a package that is brought to a construction site, said swimming pool having a wall formed from a plurality of modular wall panels joined end-to-end to form the swimming pool enclosure, said wall panels having braces on the back side thereof that support the wall and support a peripheral deck contiguous with the top edge of the wall, said swimming pool being equipped with a water circulation pump, water heater and skimmer, the method comprising the steps:

• substituting a modular wall panel for the swimming pool with a replacement modular panel that is connected at its side edges with adjacent modular wall panels, said replacement panel functioning in a dual capacity as a part of the supporting well of the swimming pool and as a part of an outer enclosing support wall for a preformed plastic therapy spa unit that is positioned within said spa enclosing support wall, said spa enclosing support wall being disposed outside the periphery of the swimming pool supporting wall
• applying braces on the back side of said spa enclosing support wall,
• positioning an integrally formed plastic spa body in said spa enclosing support wall, said spa body having an occupant seating area, a central footwell area and an enclosing wall, and pouring a continuous broad beam of concrete around the outside of the swimming pool and said spa enclosing support wall to form a footing fixing the bottom portions of the braces supporting the swimming pool wall and the spa outer support wall in place.