2022 Cost to Build a Duplex | Duplex Construction Cost
2022-1-21 · The variations in size, style, material, and location lead to a wide range of building costs. The national average cost to build a duplex is between $285,000 and $537,000, with most people paying around $388,000 for a 3,000 sq.ft. side-by-side duplex with two floors. At the lowest cost, you can build a 1,500 sq.ft. stacked duplex for $142,500.
