How Much Does a Home Addition Cost?

Thinking about adding more space to your home? Whether it’s a new bedroom, bathroom, kitchen expansion, or a private in-law suite, one of the first questions homeowners ask is: how much does a home addition cost? The answer depends on size, finishes, and features—but our Home Addition Cost Calculator gives you a quick ballpark estimate in minutes.

Average Home Addition Costs in New Jersey

In New Jersey, most home additions fall between $200 and $400 per square foot. A small bedroom addition might start around $40,000, while a larger in-law suite with a bathroom and kitchenette could easily reach $120,000 or more. Kitchens and bathrooms tend to be the most expensive, since they require plumbing, ventilation, and high-end finishes.

Factors That Affect the Cost of a Home Addition

Square Footage: The larger the addition, the higher the total cost.
Type of Room: Bathrooms and kitchens cost more per square foot than bedrooms or sunrooms.
Finish Level: Builder-grade materials cost less, while custom cabinetry, stone countertops, and luxury fixtures increase the price.
Plumbing & Utilities: Adding new plumbing, electrical, or HVAC systems can add thousands to your project.
Permits & Engineering: Local building codes require permits and inspections, usually adding 5–10% to your budget.

Why Use a Home Addition Cost Calculator?

Our calculator is designed to give New Jersey homeowners a realistic starting point for planning their project. By entering your project type, square footage, and finish level, you’ll see a cost range that reflects today’s market prices. It’s the fastest way to start budgeting for your dream addition.

Types of Home Additions We Build

MAG Development specializes in custom additions across New Jersey. Common projects include:

Bedroom Additions – Perfect for growing families or guests.
Bathroom Additions – Increase convenience and home value.
Kitchen Expansions – More cooking space and better flow.
In-Law Suites – Private living space with bedroom, bathroom, and kitchenette.
Sunrooms – Bright, relaxing spaces that connect indoor and outdoor living.

Is a Home Addition Worth the Investment?

Yes. Beyond giving you more space, a well-planned home addition can significantly increase property value. Kitchens and in-law suites often deliver the best return on investment. In competitive markets like New Jersey, extra square footage can make your home more appealing to buyers.

Next Steps After Using the Calculator

Once you’ve used the Home Addition Cost Calculator, the next step is to schedule a free consultation. We’ll review your goals, evaluate your property, and provide a detailed proposal tailored to your needs and budget.

Conclusion

If you’re considering adding more space to your home, start with our free calculator to get a quick idea of costs. From there, MAG Development’s experienced team can guide you through design, permits, and construction, ensuring your new addition blends seamlessly with your existing home.