Hey James!
I see this question come up a lot when I am working with buyers in the Inland Empire, let me try to help you understand the FHA process.
FHA is a type of loan-product, not a type of "home." It is a government subsidized product that allows a qualified applicant to put as low as a 3.5% downpayment on their home, which of course is very popular in the expensive state of California.
In order to find out if a home qualifies for an FHA it is best to ask the real estate agent you are working with. They have access to the MLS (Multiple Listing Service). Think of it as the Zillow for real estate agents, except it has way more information on it such as what type of loans the seller will accept on the purchase of the home. In a hot market some seller's wont even allow an FHA loan to be submitted on a home, as FHA loans historically (although this is becoming less and less of a case) take 10-15 days longer to close, come with additional paperwork and hassles, and are seen as less desirable than a conventional loan (which requires 5% down minimum, 20%+ down optimal).
Some types of homes will not even qualify for an FHA loan even if the seller wanted them to, they may be in such disrepair that they will not pass an FHA inspection. Some Condo/Townhome communities limit the amount of FHA loans that can be used through the association.
If you are thinking of purchasing a property using an FHA loan, my best advice to you would be to get pre-qualified through a well-vetted lender who specializes in FHA loans, and get with a real estate agent who has been through the process and knows exactly what you are looking for.
If you have additional questions please feel free to shoot me a PM!
-James