Custom pre-built additions and renovations.

Winn Design did a fantastic job renovating our 50’s brick rambler, working with a modular builder to give us a full second story with four bedrooms, two bathrooms, and a laundry room.Mark W.

Why Choose Modular?

Want a second story or other home addition while cutting time in half and cost by 10-15%? A custom-designed modular addition may be your answer. First our in-house design team will work with you to develop a design you love and select all fixtures and finishes. Then experts at a specialized factory in Pennsylvania assemble your custom modules — following our exact specifications. There are no weather delays, missing materials or subcontractor issues — so construction flies!


Once the modules arrive at your home, a crane lifts the pieces into place and Winn Modular’s construction team takes over. Instead of being out of your home for 6 months, you may be back in as little as 2 months. Modular is a great approach for second-story additions, master suite additions, expansions and bump outs, detached and attached garages, nanny and in-law suites, and more. Here are five good reasons to go modular:


  • Process is Twice as Fast

    A modular home addition takes much less time to build, often half the time of a site-built addition. You are typically back in your home within 10-12 weeks.

  • No Mold or Dry Rot

    Modular additions are immune to environmental degradation problems because they are built in a climate-controlled environment.

  • Longer-Lasting

    Since modules must be shipped from a factory to the site, they are constructed with significantly more framing material than site-built additions.

  • 10-15% Cost Savings

    Factory building is more efficient — and therefore less costly — than on-site building. Plus there are no costs from weather-related material degradation.

  • Quality Control

    Our high-quality control standards ensure that our modular additions often undergo over 80 inspections during construction.