Home Additions in New Jersey
Need more space? A well-designed home addition is often the smarter choice over moving — especially in towns like Summit, Chatham, and Short Hills where you’ve already invested in your neighborhood, your schools, and your community. Carnevale Construction has been building home additions across Morris and Union County for over 40 years.
Types of Additions We Build
- First-floor additions — Expand a kitchen, add a family room, create an open-plan living space
- Second-story additions — Add bedrooms, expand the master suite, add bathrooms
- Bump-outs — Smaller expansions that add meaningful space without full addition costs
- Garage conversions and additions — Turn unused space into living area or add a new garage with living above
- In-law suites — Self-contained living spaces attached to the main home
- Mudrooms and entryways — Practical additions that change how a home lives
The Process
Home additions require permits, and permit requirements vary by town. We’ve worked in every municipality in Morris and Union County and know the local approval process well. We work with your architect or can recommend one, manage the permit process, and keep you informed at every stage.
Sal and Mike are personally involved from the first conversation through the final inspection.
What It Costs
Home addition costs in NJ typically range from $150 to $300+ per square foot, depending on complexity, finishes, and structural requirements. A typical 400 sq ft addition runs $80,000–$150,000. We provide detailed estimates before any work begins.
Why Add Instead of Move?
In today’s NJ market, moving to a larger home often means paying a significant premium — plus transaction costs, moving costs, and the disruption of starting over in a new neighborhood. A well-built addition lets you get the space you need while staying in the home and community you love. And it adds real value to your property.
Serving Summit, Chatham, Short Hills, Madison, Basking Ridge, Westfield, Warren, New Providence, and all of Morris and Union County, NJ.
Call Sal: 201-715-8008