The cost to build a house in Riverside ranges from $110 to $250 per square foot depending on the grade of construction you choose. This does not include the cost of land or site preparation. Home building cost for standard grade construction run between $110 to $160 per square foot. Home building cost for premium grade construction can run between $160 to $200 per square foot. Luxury grade construction can run as high as $200 to $250 per square foot. Square Feet of the ADU Cost Per Square Foot Estimated Total Costs: 0 Update Past this number into the loan calculator to estamat the loan payment. Leave this field blank