You love your neighborhood, your kids are in good schools, and your commute works. But you need more space. So you face the question every growing family hits: do we add on or do we move?
Here is how to think about it with real numbers from the Southeast Michigan market.
The True Cost of Moving
Moving is expensive in ways that are easy to underestimate. Here is what it actually costs to sell your current home and buy a new one in Oakland County:
- Real estate commissions: 5 to 6 percent of sale price. On a $400,000 home, that is $20,000 to $24,000.
- Closing costs (selling): 1 to 3 percent. Another $4,000 to $12,000.
- Closing costs (buying): 2 to 5 percent of purchase price. On a $500,000 home, that is $10,000 to $25,000.
- Moving expenses: $3,000 to $8,000 for a local move with a professional company.
- Immediate updates to new home: Most buyers spend $5,000 to $15,000 on paint, fixtures, and changes to make a new house feel like theirs.
Total cost of moving: $42,000 to $84,000+ before you even start paying a higher mortgage.
And in 2026, mortgage rates are significantly higher than what many homeowners locked in during 2020 and 2021. Giving up a 3 percent rate for a 6.5 percent rate on a larger loan can add $800 to $1,500 per month to your payment.
The Cost of a Home Addition
Home additions in Southeast Michigan typically cost $200 to $350 per square foot, depending on complexity and finishes. Here are common addition projects:
| Addition Type | Size | Typical Cost |
|---|---|---|
| Bedroom + Bathroom | 300 sq ft | $75,000 - $110,000 |
| Family Room | 400 sq ft | $80,000 - $120,000 |
| In-Law Suite | 500 sq ft | $125,000 - $175,000 |
| Second Story | 800 sq ft | $200,000 - $320,000 |
When an Addition Makes More Sense
- You like your neighborhood and schools. No amount of new square footage replaces the community you have built.
- You have a low mortgage rate. If you locked in below 4 percent, keeping that rate and financing the addition separately often makes more financial sense.
- Your lot can handle it. If setbacks and zoning allow the addition, you can gain space without the transaction costs of moving.
- You need 300 to 800 square feet. For this amount of space, an addition is almost always cheaper than the total cost of moving to a larger home.
When Moving Makes More Sense
- You need a fundamentally different house. Going from a 1,200 sq ft ranch to a 3,000 sq ft colonial is a bigger jump than any addition can handle.
- Your foundation or systems are aging. If the house needs a new roof, HVAC, and plumbing anyway, you may be throwing good money after bad by adding on.
- The neighborhood has peaked or declined. An addition on a home in a declining market may not recoup its value.
- You need to change school districts. No renovation fixes that.
The Bottom Line
For most Oakland County families who love where they live but need more space, an addition is the smarter financial move. You keep your rate, avoid $50,000+ in transaction costs, and get exactly the space you need designed to your specifications.
Not sure which direction makes sense for your situation? Schedule a free consultation with SW Construction. We will look at your home, discuss what you need, and give you an honest assessment of what an addition would cost. Sometimes the right answer is to move, and we will tell you that too. Call (248) 804-5884.