Rents on Louisiana average $43.67 per square foot per year, or 49 percent more than the Houston market average of $29.28, according to commercial real estate firm JLL's "Most Expensive Streets" report. Louisiana Street is home to headquarters of such Fortune 500 companies as Enterprise Products Partners, Kinder Morgan, CenterPoint Energy and Targa Resources; global law firms such as Bracewell & Giuliani and Baker Botts; and architecture firms such as Ziegler Cooper, Page and Gensler. Sand Hill Road, known as the "Wall Street of the West" due to its concentration of venture-capital firms in Menlo Park, fetched rents of $141.60 per square foot. Hamilton Avenue, populated by Silicon Valley tech firms in Palo Alto, saw rents of $124.44. With rents of $41.37 per square foot, prices are 41 percent higher than the overall market, according to JLL.