Luxury Home Additions, In-Law Suites, & Major Expansions Built to Last
Home Addition Contractors in New Jersey & Pennsylvania
MAG Development Inc. specializes in custom home additions and large-scale renovations throughout South Jersey and the Main Line of Pennsylvania.
From in-law suites and primary suite expansions to second-story additions and full home reconfigurations, we help homeowners expand with intention, improving both functionality and long-term value.
Start your home addition project with a free consultation today.
Get a Free Estimate
We Build Structural Home Additions Across NJ & PA
MAG Development Inc. specializes in full-scale home additions and major residential expansions. We focus on structural projects that require planning, precision, and experienced execution — not surface-level remodels.
Our Home Addition Capabilities Include:
- In-law suites & multigenerational living spaces
- Primary bedroom & bathroom suite additions
- Second-story additions
- Rear and side home extensions
- Kitchen expansions & open-concept reconfigurations
- Garage conversions & attached additions
- Structural framing & load-bearing wall modifications
From permitting and structural planning to framing, exterior integration, and interior finishing, our team manages the entire build process.
Serving South Jersey & the Main Line of Pennsylvania
MAG Development Inc. is based in South Jersey and regularly builds home additions in established communities throughout:
New Jersey
Haddonfield, Moorestown, Collingswood, Haddon Township, Haddon Heights, Voorhees, and surrounding areas.
Pennsylvania
Ardmore, Bryn Mawr, Wayne, Villanova, Swarthmore, and neighboring Main Line communities.
Our team focuses on larger-scale home addition projects, and we are open to traveling beyond our core service areas for substantial expansions and custom builds.
If you’re located nearby and planning a major addition, we’re happy to discuss your project.
In-Law Suites & Room Additions
Need additional living space without relocating? We design and build custom in-law suites, attached guest quarters, and room additions that expand your home while maintaining architectural continuity.
Our room addition projects commonly include:
- Private in-law suites with bedroom & bath
- Attached guest apartments
- Expanded family rooms
- Home office additions
- First-floor bedroom additions
- Bonus room expansions
From foundation work and framing to exterior matching and interior finishes, we ensure your addition blends seamlessly with your existing home.
Second-Story & Major Home Additions
Our team specializes in second-story additions and major structural expansions that significantly increase square footage while maintaining architectural balance.
Our team handles:
- Full second-story additions
- Structural roof modifications
- Load-bearing wall reconfiguration
- Large rear or side expansions
- Full-level build-outs
Whether you’re expanding for growing family needs or increasing long-term property value, we build additions that are structurally sound, seamlessly integrated, and designed to last.
Request a free consultation today.
Your consultation isn’t routed through a call center. When you reach out, you’ll speak directly with Ernest, the owner, who personally reviews each project and provides straightforward guidance from day one.
Rear & Side Home Extensions
MAG Development Inc. designs and builds rear and side home extensions that integrate seamlessly with your existing structure — both architecturally and structurally.
These additions are commonly used for:
- Expanding kitchens into open-concept layouts
- Creating larger family or living rooms
- Adding first-floor bedroom suites
- Extending dining areas
- Increasing overall footprint for long-term livability
Our team handles foundation work, framing, roofing integration, exterior matching, and interior finishing — ensuring your extension feels original to the home, not added on later.
FAQ
Most Frequent Questions & Answers
Yes, at MAG Development Inc. all of our contractors are certified and licensed in New Jersey and Pennsylvania.
The duration of a home addition project varies depending on factors such as the size and complexity of the addition, local building regulations, and weather conditions. On average, a home addition can take anywhere from a few weeks to several months to complete.
Yes, in most cases, you will need to obtain permits for your home addition project. Our team will assist you in obtaining the necessary permits and ensuring that your addition complies with local building codes and regulations.
The cost of a home addition depends on several factors, including the size and scope of the project, the materials used, and any additional features or amenities. We offer personalized quotes based on your specific needs and budget.
Yes, in many cases, a well-planned and professionally executed home addition can increase the value of your property. However, the extent of the increase will depend on various factors such as the quality of the addition, its compatibility with the existing structure, and market conditions.
Yes, we understand that home additions can represent a significant investment. That’s why we offer flexible financing options to help make your project more affordable. Our team will work with you to find a financing solution that fits your budget.