Two Story Extension Plans and Estimated Building Costs These two story home addition plans are perfect for homes that are already two stories, but need a 2 story extension of the existing house to make room for additional rooms and amenities. A basic design with modest finishes and standard materials typically lands near the average range, while high-end architectural details or complex roof lines push costs higher. On a per-square-foot basis, expect roughly $180-$450 per sq ft for shell construction plus finishing bets that can add 20-40% depending on bathroom and kitchen needs.
Enter the total square footage of the second story addition and the calculator will estimate the labor costs based on average rates in your area. Knowing labor costs upfront will help you plan your budget more effectively. With a second-story addition, you'll also save money on digging and excavation, which can cost $1,662 to $6,711, as well as on pouring a new foundation, which can run you anywhere from $4,025 to $14,830 or $5 to $37 per square foot, according to HomeAdvisor.
Learn how much it costs to add a second story, including square foot pricing, build types, cost-saving tips, and regional factors. A Second Story Addition Cost Calculator allows homeowners and builders to estimate project expenses based on square footage, material costs, structural reinforcements, and labor. 2 story home addition cost definitions: adding rooms to a house cost adding sq ft to house room addition price per square foot The Big Picture: Average Costs for a Second Story Addition Please note: All prices mentioned are national averages based on recent data and should be used for estimation purposes only.
Actual costs will vary based on location, scope, and finishes. We encourage you to. Discover second-story addition costs, including the cost of adding a second story, second-floor addition cost, and two.
The initial step in estimating the construction cost is utilizing a preliminary cost-per-square-foot calculation, which provides a broad ballpark figure. For a second-story addition, this range is typically between $100 and $300 per square foot nationally, though complex or luxury projects can exceed $500 per square foot. A home addition costs $125 to $250 per square foot total on average, depending on the type and features.
A 600-square-foot house addition costs $75,000 to $150,000.