The Tiki House is a house at 6589 Del Playa (ocean side), known for parties. In 2012 the house was moved back 30 feet from the cliff, since the cliff has been eroding over time. A video about the move emphasizes that the house was built in 1905. (Here's the county zoning review document about the move, although it doesn't say much.) 1905 would be very unusual for IV, and it's hard to confirm that date. County assessor's records for the house say 1928.
The Tiki House is also sort of infamous as the house where a porn video was shot in 2007. The Fall 2012 issue of WORD Magazine (Issue 17) has an article about this on pages 14-15, describing it as "industry professionals in a semi-staged party scene".