Home Addition Construction & Design

When you’ve created special memories in your home, leaving it behind and moving is difficult. But sometimes, you outgrow it and need more space. Rather than purchasing a new home, turn to SEI Construction, Inc for your Central New Jersey home addition. We’ll add living space to your home’s exterior that will not only look and function great but will blend architecturally with your existing structure.

Whether you want that family room for all to enjoy, extra bedroom, home office for your business, sunroom, or something more; we’ll meet with you, discuss your visions, wants, needs, and ideas to create a tailored plan of action for your home addition.

If you’re concerned you can’t add a Union County home addition because your property lacks the square footage, SEI Construction, Inc has you covered. We can build up and add an entire new story to your home without taking up any more space on your property.

Home Addition & Room Extension Services

This project type requires a lot of forethought and the right team of builders to make your vision come to life. At SEI Construction, Inc, we specialize in building home additions that will not only look and function great but blend well with your existing structure. Our home addition design and construction services include:

  • Home Offices
  • Family Rooms
  • Garage Conversions
  • In-Law Suite Additions
  • Bump-Outs
  • Home Fitness Rooms
  • Home Theater Rooms
  • Adding 2nd Level to Single Level Homes.

And more!

How Much Do Home Additions Cost?

The cost of your home addition will depend on the type of addition, square footage, if the space needs to be reconstructed, whether the construction company will build-up or out, the materials and products used as well as your location in New Jersey. We recommend that our clients visit the Cost vs. Value report by Hanley Wood to get small, mid, and major home addition costs and ROI for their area.

When you choose SEI Construction, Inc as your Central New Jersey home addition Contractor, you’ll work with a team of design professionals and sub-contractors who take a collaborative and comprehensive approach to home addition services – minimizing inconvenience, ensuring smooth workflow, and giving you value for your money.

Our team will plan out every phase of your project. From foundation, roofing, siding, electrical, and plumbing inspections to permit pulling, project renderings, material selections, construction planning, and the final walk-through.

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    Our Home Addition Reviews

    We hired Mike and his team to put on an addition to our home in Clark. Although we had a smaller budget than most of Mike’s clients, Mike worked within our budget and showed he cared the same for us as the rest of his clients. Our situation was unique because my wife was 9 months pregnant when the work started. The day our daughter was born was the day the kitchen was demoed. Mike and his team did a great job doing whatever they could so the work would not affect our baby or our 4 year old son. They worked hard to keep the rest of the house clean and dust free. As in any project, there were situations that came up that had to be dealt with. Mike worked with us to come to the best resolutions possible. We highly appreciate Mike and Tyler’s craftsmanship, professionalism, trustworthiness, but most importantly their respect for our family. We would like to thank Mike, Tyler, Rudy, Oscar, Izzi, and Nick for doing great work and for caring about our family. Our home is now complete!

    Mike and Nicole Riley Home AdditionHouzz Review

    We cannot recommend SEI Construction more highly. My wife and I have worked with many contractors as serial renovators and the quality of craft, attention to detail, pace, and the absolutely delightful team of employees that SEI brings to bear is unmatched. SEI is professional and qualified in every sense of the word and we cannot be more pleased with our final results!

    Gary Z Home Addition Houzz Review

    Our Awards, Accolades & Associations

    Sure, we like awards and recognition. It is confirmation we are meeting – and even exceeding – our very high standards. But even better than the accolades and associations themselves is knowing that behind it all are thrilled customers throughout Westfield, NJ, and surrounding areas.

    Houzz Contractor