Second Story Addition Cost Calculator
Estimate the cost of adding a full second story to your home based on square footage, finish level, and your location.
Last updated: March 25, 2026
Second Story Addition Cost Calculator
Estimate the cost of adding a full second story to your home based on square footage, finish level, and your location.
Estimated Total
$253,000
Itemized Breakdown
This calculator provides estimates based on national averages adjusted for your region. Actual costs may vary significantly based on specific project conditions, contractor availability, material prices, and local market factors. Always get at least 3 quotes from licensed, insured contractors before starting your project.
Want the full picture?
Read our complete Second Story Addition cost guide with material comparisons, contractor tips, savings strategies, and regional pricing data.
Quick Cost Reference
Cost by Tier
Full second story over a 1,000 sq ft footprint with standard materials, vinyl siding, builder-grade windows, and basic finishes. Minimal interior customization.
1,200 sq ft second story with mid-grade finishes, fiber cement siding, energy-efficient windows, 3 bedrooms, 2 bathrooms, and dedicated HVAC system.
1,500+ sq ft second floor with custom architectural design, premium finishes, vaulted ceilings, master suite with luxury bath, and full structural engineering.