HOUSTON — Argus Realty Investors has acquired three office buildings totaling 253,524 square feet from Caldwell Cos. for approximately $20 million. The Class B portfolio is 98 percent leased and includes Park 10 Place, an 83,078-square-foot, five-story office building located at 16420 Park Ten Place; Broadfield, a 102,865-square-foot, six-story office building located at 1400 Broadfield Blvd.; and Willowbrook Office Building, a 67,581-square-foot property located at 7915 FM 1960 Rd. The portfolio has 48 tenants including CITGO Petroleum and Fletcher Yoder. La Salle Bank provided a $21.2 million 10-year loan at a 5-year 6.15 percent fixed rate. Darrell Betts of Grubb & Ellis’ Houston office represented the Houston-based seller.