Home Addition Cost in Michigan
Updated October 2026 · Based on Michigan contractor data
$40,800
Low Estimate
$81,600
State Average
$146,880
High Estimate
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Total Cost
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Cost per Sq Ft
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Home Addition Costs in Michigan (400 sq ft)
| Addition Type | Cost in MI | Per Sq Ft | National |
|---|---|---|---|
| Bedroom | $46,920 | $117/sqft | $46,000 |
| Bathroom | $89,760 | $224/sqft | $88,000 |
| Garage | $28,560 | $71/sqft | $28,000 |
| Sunroom | $57,120 | $143/sqft | $56,000 |
| Second Story | $118,320 | $296/sqft | $116,000 |
| Adu | $93,840 | $235/sqft | $92,000 |
Home Additions in Michigan
Home addition costs in Michigan run near the national average. Michigan construction costs align with U.S. averages.
What's Included in Home Addition Costs
- • Design and architectural drawings: $2,000–$8,000
- • Permits and inspections: $1,530–$5,100
- • Foundation: $5,100–$20,400 depending on type
- • Framing, roofing, exterior: $26–$61/sqft
- • Interior finishes: $41–$122/sqft
Planning Tips
- • Budget 10–20% contingency for unexpected issues
- • Get quotes from at least 3 licensed general contractors
- • Confirm zoning setback requirements before designing
- • Consider financing options: HELOC rates vary by state
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Get Free Quotes →Frequently Asked Questions
How much does a home addition cost in Michigan?
Home additions in Michigan cost $40,800–$146,880, with an average around $81,600.
How much does it cost to add a bedroom?
Adding a bedroom in Michigan costs $46,920–$65,688 for a typical 400 sq ft room.
Is a home addition worth it?
Home additions typically recoup 50–80% of cost at resale. ADUs offer the best ROI through rental income potential.
How long does a home addition take?
A bedroom/bathroom addition takes 1–3 months. A second-story addition or ADU takes 3–6 months. Include 4–8 weeks for permitting.
What is the cheapest type of home addition?
A garage or sunroom addition is typically cheapest at $28,560–$57,120 for 400 sq ft.