Existing private, single family residence, California (specifically Los Angeles).
Owner remodels various aspects within the existing structure, but the scope does not kick the project into the 'major remodel' category.
Owner wishes to construct a separate free-standing Pavilion at the rear of the house, but separated from the existing home by only a matter of inches.
The Pavilion is approximately 15' x 25' overall.
The Pavilion is non-combustible, all steel structure with a roof that is copper sheets plus a central skylight (steel and glass).
There will be amenities including lighting, electric space heaters, motorized projector and screen, a bar and back-bar, sink, outdoor kitchen with grill, warming ovens, pizza oven and various other equipment.
There are no walls, but the one side of the structure that is adjacent to the existing house is, as noted, within inches of same, so in effect this is open on three sides.
Is this considered a new building that must be sprinklered?
Even if a new building, would it be exempt from sprinklers due to the non-combustible structure and three open sides?
Input will be appreciated.