The average price per square foot increased by 6.6% to $872 from the same period a year ago. There was a decline in average sales size, down 8.3% to 5,800 square feet. Sales size was 13.3% less than the five-year quarterly average of 6,689 square feet. There were 15 sales in the quarter, just above the four-year quarterly average of 14 and 25% higher than the same period last year. Listing inventory expanded by 22.1% to 83 houses…