Plan your dream home addition with our Home Addition Cost Calculator! Get accurate, tailored estimates for projects like bathrooms, garages, or two-story expansions in just a few clicks. Unlike competitors, our user-friendly house addition cost calculator uses localized data to simplify budgeting, so you can start building with confidence today!
Step 1: Select Addition Type
Choose one or more additions you want to add to your home.
Main Rooms
Other Rooms
Parts of the House
Home Equipment
Home Upgrades
How to Use the Home Addition Cost Calculator
It helps you estimate the cost of adding new rooms or upgrades to your home based on your location, room size, and type of addition.
First, select the type of room or home addition you want (like Kitchen, Bathroom, or Garage) and click Continue.
Enter the size of your planned addition in feet. The calculator will automatically find the total square footage for you.
Construction costs vary by location. Your city or state determines the average cost per square foot in your area.
Yes! Just click the Back button to adjust your location and get a new estimate.
The calculator provides an average cost estimate. Actual prices may vary depending on materials, labor, and design choices.
You can select one at a time for now. If you want to compare multiple additions, simply calculate one, then reset and choose another.
No – this tool is 100% free to use and doesn't require any sign-up.