Remodeling your bathroom can add significant value to your home. Your bathroom remodel cost in Columbus, OH will depend on size, fixtures, materials, labor, and other factors.
Home Addition Cost in Detroit [2025 Data]
Normal Range: $28,406 - $96,075
A home addition costs an average of $61,704 in Detroit, Michigan. Depending on the location, size, type, and materials, most homeowners spend between $28,406 and $96,075.
How we get this data
Ursula Page / Adobe Stock Photography
Ursula Page / Adobe Stock Photography
Highlights
The type of home addition you want to build and the square footage you want to add will influence your costs the most.
Lot sizes in Detroit are very small, so many homeowners pay more to build second-story additions since they don’t have the space to build out.
Home additions are extremely valuable in Detroit, boosting property value by between 11.2% and 28%, which is several times the national average.
When choosing exterior building materials, consider upgrading to those that can offer insulation through the long, cold winters, like fiber cement siding over vinyl siding.
Building a home addition in Detroit costs an average of $61,704, and most projects total between $28,406 and $96,075. Your costs will depend mostly on the type of home addition and the size of the add-on, with per-square-foot costs ranging from $80 to $500. Second-story additions are more prevalent in the area due to the small lot sizes, and these tend to cost more than bump-outs.
Home Addition Cost Factors
Home additions in Detroit, Michigan, can cost as little as $7,500, but some projects reach as high as $165,000. There’s such a wide range because multiple factors play a role in your pricing, from the style of add-on and the square footage to the quality of the materials you choose and the site prep you need. Building permits and taxes will also affect your costs.
Size
Home additions cost between $90 and $250 per square foot if you’re building out and between $300 and $600 per square foot if you’re building up. The cost to add a 10x10 room to a home in Detroit costs an average of about $15,000 if you build out and $50,000 if you build up.
Where in those ranges your total falls also depends on the complexity of the room and its finishes. For example, adding a bathroom will often cost more than a bedroom since it requires additional plumbing and electrical work.
Price Notice
Remember that if you add square footage to your home, the cost of your homeowners insurance will increase accordingly. Before you embark on this project, speak to your insurance company about expected costs.
The average property size in Detroit is just 0.129 acres, or just over 5,600 square feet, which leaves minimal room for most homeowners to build out, especially given the setback laws restricting how closely you can build to your property lines. As such, many homeowners only have the option of building up, which costs more. This is one reason why the average cost of a home addition in Detroit is well above the national average.
| Size (Sq. Ft.) | Building Out | Building Up |
|---|---|---|
| 60 | $5,750-$14,400 | $21,600-$36,000 |
| 80 | $7,650-$19,200 | $28,800-$48,000 |
| 100 | $9,600-$24,000 | $36,000-$60,000 |
| 150 | $14,400-$36,000 | $54,000-$90,000 |
| 200 | $19,200-$48,000 | $72,000-$120,000 |
| 300 | $28,800-$72,000 | $108,000-$180,000 |
| 400 | $38,400-$96,000 | $144,000-$240,000 |
Materials
As you can imagine, it takes many kinds of building materials to complete a custom home addition. Material prices vary widely, so your price could push closer to $96,075 if you choose luxury or high-end materials at each step of the way.
The materials you choose for the interior of your home are all up to personal preference, but for the exterior of your home addition, you need to choose materials that will stand up to the climate in Detroit. For example, metal roofing is more expensive than asphalt shingles but will shed the above-average snowfall more readily and help avoid structural damage. It’s also a good idea to consider upgrading to a more insulative siding material, like fiber cement, brick, or stone, which can help reduce your heating costs through the long, cold winters.
The tables below are just a rough guideline for material costs, but it should illustrate how prices can fluctuate based on the materials you choose, which will also determine how well-suited your add-on is for the climate in Detroit. Ask your home addition contractor for recommendations specifically for your home.
Foundation Materials Cost:
| Foundation Material | Cost per Sq. Ft. | Pros | Cons |
|---|---|---|---|
| Basement | $20–$37 | Avoids frozen pipes | Expensive excavation |
| Crawl space | $6–$18 | Avoids frozen pipes | No living space |
Insulation Materials Cost:
| Insulation Material | Cost per Sq. Ft. | Pros | Cons |
|---|---|---|---|
| Blown-in | $0.60–$2.30 | Reduces heating cost | Expensive |
| Fiberglass batts | $0.30–$0.40 | Easy to install | Energy efficiency |
| Rigid foam | $0.25–$0.50 | Energy efficiency | Hard to install |
Roofing Materials Cost:
| Roofing Material | Cost per Sq. Ft. | Pros | Cons |
|---|---|---|---|
| Asphalt shingles | $1–$4 | More affordable | Prone to ice dams |
| Metal | $4–$16 | Sheds snow well | More expensive |
Siding Materials Cost:
| Siding Material | Cost per Sq. Ft. | Pros | Cons |
|---|---|---|---|
| Brick | $10–$20 | Long lifespan | Expensive |
| Fiber cement | $5–$14 | Adds insulation | Heavy material |
| Stone | $7–$30 | Biggest value add | Most expensive |
| Vinyl | $3–$12 | Most affordable | Minimal insulation |
Window Frame Materials Cost:
| Window Frame Material | Cost | Pros | Cons |
|---|---|---|---|
| Aluminum | $75–$400 each | Most affordable | Minimal insulation |
| Composite | $300–$1,200 each | High insulation | Expensive |
| Fiberglass | $500–$1,500 each | Best insulation | Most expensive |
| Vinyl | $100–$900 each | Best value | Can warp in cold |
| Wood | $150–$1,300 each | Traditional look | Can rot from snow |
Type
The cost to add on a room varies based on the type of home addition and the size of the room you’re building. As mentioned above, building out costs less than building up, although Detroit residents often have no choice but to build up due to small lot sizes.
| Addition Type | Average Cost |
|---|---|
| Bumpout | $12,100–$52,100 |
| Detached garage | $23,200–$40,700 |
| Dormer | $7,300–$30,300 |
| In-law suite | $30,200–$320,700 |
| Second-story | $121,000–$302,500 |
| Sunroom | $26,600–$90,800 |
The type of room you want to add matters, too. Rooms like kitchens and bathrooms require plumbing work that a bedroom doesn’t, while an unfinished attic home addition may not require electrical or HVAC work that a bedroom needs. The cost per square foot for your home addition will vary based on utilities and the finishes required for how you plan on using the extra square footage.
Site Prep
On average, site prep for a home addition costs between $1,500 and $5,000. You may not need any site prep in some cases, while other home addition projects may require grading land, demolishing concrete patios, removing trees, and other work that can add to your total. Since many homeowners in Detroit are forced to build up rather than out, there’s a good chance you won’t have any site prep costs.
Permits
Major construction projects like home additions will require building permits in Detroit. The city charges permit fees based on the total cost of construction. For virtually all home additions, total costs will sit between $2,000 and $500,000, and at that price tier, the City of Detroit charges a $150 base fee plus $20 per $1,000 worth of work beyond the initial $2,000 worth of work. Given the average home add-on cost in Detroit, permit fees will average $570.
Home Addition Pro Costs
The labor costs to hire a homebuilder in Detroit to build your addition will average between $24,700 and $37,100. This is still quite expensive compared to the total average cost, mostly because projects as a whole are more costly due to more expensive second-story additions being more common.
For the most accurate estimate possible, you should also consider sales tax, which can add thousands to your total. The sales tax rate in Detroit is 6%, so you’re looking at an average sales tax of $3,702.24.
Does a Home Addition Increase Property Value?
Yes, building a home addition will increase property value, and adding living space is one of the best things you can do to improve home value. On average, a home add-on will provide a return on investment (ROI) of between 20% and 50%.
Given the cost of a home addition in Detroit, that’s a value add of between $12,300 and $30,900. The average property value sits at $110,000, so a home addition can boost your entire home value by between 11% and 28%, which is well above the national average.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
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