If what im writing is entirely or almost entirely in one house, do i have to write the scene heading "INT. BOB'S HOUSE, "SPECIFIC PLACE" - DAY", or can i just say "SPECIFIC PLACE - DAY" ?

If what im writing is entirely or almost entirely in one house, do i have to write the scene heading "INT. BOB'S HOUSE, "SPECIFIC PLACE" - DAY", or can i just say "SPECIFIC PLACE - DAY" ?

Subheadings... Establish the main location and then as you move through the house, use subheadings.

filmy