Addition square footage
Quality Tier
Standard materials, solid craftsmanship
Scope of Work
Labor
Home Addition Cost in Great Falls MT: 2026 Guide
Use the calculator above to get a quick estimate. The guide below explains what drives home addition costs in Great Falls MT and what to expect from contractors in Great Falls MT.
Typical Home Addition Costs in Great Falls MT
| Project Scope | Low | High |
|---|---|---|
| Simple room bump-out (100–200 sqft) | $7,600 | $14,200 |
| Standard bedroom addition (200–350 sqft) | $21,800 | $48,000 |
| Master suite with bathroom (350–500 sqft) | $48,000 | $56,600 |
| Full in-law suite or major addition (600–1,000 sqft) | $56,600 | $130,400 |
What Affects Home Addition Costs in Great Falls MT?
Labor rates: Contractors in Great Falls MT charge $39–$78/hour for home addition work — notably below the national average.
Material costs: Material prices in the Mountain region are notably below national average due to local supply, transportation costs, and market demand.
Project complexity: Site conditions, permitting requirements, and non-standard layouts can add 15–30% to total project cost.
Frequently Asked Questions
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Estimated cost in Great Falls MT
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