Where is keller williams realty international located? Office Search Keller Williams Realty International 1221 South Mopac Expy, Suite 400 Austin, TX 78746What is the southland regional association of realtors? The Southland Regional Association of REALTORS® is the "Voice For Real Estate" in the San Fernando and Santa Clarita valleys.Why keller williams for real estate? To be the real estate company of choice for agents and their customers. A technology company that provides the real estate platform that our agents’ buyers and sellers prefer. Keller Williams thinks like a top producer, acts like a trainer-consultant, and focuses all its activities on service, productivity, and profitability.