How Much Does It Cost to Build a Home Addition?
If you’re considering adding more space to your home, one of the first questions that comes to mind is: “How much will it cost?”
Home additions are a significant investment, but they’re also one of the best ways to increase your home’s functionality, value, and overall square footage. The answer to the cost question, though, isn’t straightforward—it depends on the size, scope, materials, and even the location of your home.
Let’s break down the key factors that influence the cost of a home addition, along with typical budgets for different types of projects.
Factors That Impact the Cost of a Home Addition
1. Type of Addition
What are you adding to your home? A basic single-story addition, a second story, or a complex multi-room project? The type of addition significantly affects the overall cost.
2. Foundation Type
Building on a crawlspace foundation is more affordable than adding a basement below the addition. Conversely, slab foundations can limit flexibility but lower costs.
3. Plumbing and Electrical Needs
Does your addition include a bathroom, kitchen, or laundry area? These spaces require plumbing, electrical, and sometimes HVAC upgrades, which can increase the cost.
4. Materials and Finishes
Material choices (e.g., siding, windows, flooring) have a big impact. High-end materials and finishes naturally raise the budget.
5. Home Age and Location
Older homes may require structural or system updates to meet modern building codes. Location can also impact costs due to permitting fees, labor rates, and accessibility.
Common Home Addition Projects and Budgets
Build a 1-Story Addition on a Crawlspace Foundation: $125,000 – $300,000+
This is one of the most popular additions, perfect for expanding a kitchen, creating a family room, or adding a master suite.
Breakdown of costs:
Add a basement below: +$50,000 – $150,000
Build a 2-Story Addition: $200,000 – $450,000+
A 2-story addition is ideal for adding bedrooms, bathrooms, or even a second-floor living space.
Breakdown of costs:
Add a basement below: +$50,000 – $150,000
Add a Sunroom or Screened Porch: $80,000 – $200,000
These are more affordable than fully enclosed additions but still add functional living space.
Costs depend on:
Expand a Kitchen or Add a Breakfast Room: $140,000 – $250,000+
Kitchen expansions are some of the most desirable home additions, but they involve more complexity due to plumbing, electrical, and cabinetry needs.
Costs to consider:
Add a Master Suite: $200,000 – $350,000+
A master suite addition typically includes a bedroom, bathroom, and walk-in closet.
Costs depend on:
Finish a Basement as Part of the Addition
When adding square footage, many homeowners choose to finish their basement as part of the project.
Common upgrades include:
Hidden Costs of Home Additions
At KraftMaster Renovations, we pride ourselves on eliminating surprises for our clients. Here are some potential costs to keep in mind:
Permits and Inspections:
These can range from $1,000 – $5,000 or more, depending on the project’s complexity and your local jurisdiction.
Demolition:
Removing existing walls or exterior features adds labor and disposal costs.
Upgrading Utilities:
Older homes may need updated plumbing, electrical systems, or HVAC to accommodate the addition.
Accessibility:
Homes with limited parking, steep driveways, or multi-level challenges can increase labor costs.
So, How Much Does It Cost to Build a Home Addition?
The short answer: It depends.
Most home additions fall within these general ranges:
Small Addition
$125,000 – $200,000
(e.g., a single room)
Medium Addition
$200,000 – $350,000
(e.g., master suite or kitchen expansion)
Large Addition
$200,000 – $350,000
(e.g., second story or multi-room expansion)
Home additions are a big investment, but they’re also one of the best ways to create a more functional and enjoyable space for your family. At KraftMaster Renovations, we specialize in turning your vision into reality—seamlessly integrating new spaces with your existing home.
Ready to Build Your Dream Addition?
Contact us today to schedule a consultation, or attend one of our free seminars to learn more about the process, timelines, and costs. Let’s start planning your perfect home addition!
