Westport Plaza and Square, a 39,334-square-foot shopping center in East Side Costa Mesa, has been listed for $26,548,000, or roughly $675 per square foot. The L-shaped property at 369 E 17th St. and 1685 Tustin Ave. fronts along 17th Street, a busy thoroughfare in Costa Mesa. The property is 97 percent leased, with a compound annual growth rate of 4.4 percent.