how much does it cost to build a small porch
1 The cost to build a 16â x 20â covered, enclosed porch is approximately $60 to $100 per square foot, or a total of around $16,000 to $32,000. 2  Larger porches generally cost less per square foot while smaller porches tend to cost more per square foot. The cost of a porch could be anywhere from $5,000 for a simple structure or less to $75,000 or more for a sunroom or similar fully enclosed structure. 2  The cost to build a 16â x 20â covered, enclosed porch is approximately $60 to $100 per square foot, or a total of around $16,000 to $32,000.