Second Story Addition Cost
Second story additions cost $100–$200+ per square foot. An average 500 sq ft bedroom and bath suite runs $75,000–$150,000.
Home Addition Cost Calculator
Estimate the cost of adding square footage to your home based on size, materials, and foundation type.
Estimate Breakdown:
Base: $37,000 | Range: $27,750 – $49,950
*Permits, architectural fees, and utility connections not included.
Frequently Asked Questions
How much does a second story addition cost?
A second story addition typically costs $100–$200+ per square foot. A 500 sq ft bedroom and bath suite averages $75,000–$150,000.
Can I add a second story to any house?
Most single-story homes can support a second story, but your foundation, load-bearing walls, and roof structure must be evaluated by a structural engineer.
Do I need to move out during construction?
For most second story additions, you can remain in the home. Expect noise, dust, and limited access to the work area for 3–6 months.