Use the free ADU Cost Calculator on ToolVexa to estimate the build cost of an accessory dwelling unit from its size and a cost per square foot.
How to Use
Enter the planned ADU size in square feet and the build cost per square foot, then press Calculate.
Formula in Plain Words
Estimated cost is ADU size in square feet times cost per square foot.
Worked Example
For a 600 sq ft ADU at $300 per square foot, the estimated cost is $180,000.
FAQs
Does this include permits and land?
No. Those costs vary by location and are not included in this simple estimate.
Is the cost per square foot the same everywhere?
No. It varies by region, materials and finish level.
Should I use this for a final budget?
No. Get a local builder quote for a firm budget.