Guarantee Real Estate, a Berkshire Hathaway affiliate is the largest real estate brokerage in Central California. Specializin ... g in the sale of residential properties, Guarantee Real Estate has seven offices in Fresno and Clovis, and offices in Reedley, Kingsburg, Shaver Lake, and Prather. The company is owned by HomeServices of America, a Berkshire Hathaway affiliate. Over 70,000 real estate agents work for HomeServices brokerages nation wide. read more