There are many options in Los Angeles with regards to pre-fabricated homes. Many of them are considered green/eco friendly as building pre-fab homes creates less waste than normal construction.
This month there is the 5th Annual Ca-Boom at Barker Hanger in Santa Monica. There will be many local prefab home sellers there and if it's something you are considering doing I highly recommend it.
Prefab homes are allowed in Los Angeles and it's growing more and more popular all the time. It requires the same permits as building a regular home.
I would find a local real estate professional who has a website that allows for "map searching." There is a similar function here on trulia, but a local person with direct access to the MLS will probably be able to help you best. Good luck and happy hunting!... more