Dormer & Home Extension Specialists in Nassau County
Madden Development builds dormers, home additions, and extensions for Long Island homeowners who need more space — without moving.
At Madden Development, our multiple industry accolades are a testament to our unwavering commitment to excellence and distinguish us as the top choice for premium home remodeling contractors
Nassau County Homeowners Choose Madden When They Need More Space
Most families on Long Island don't need a new house. They need more room in the one they already have.Madden Development specializes in dormer installation, home extensions, and additions for homeowners across Nassau County. Whether you're converting an attic into two bedrooms with a shed dormer, pushing out the back of your house with a rear extension, or adding a full second floor — we handle everything.
Architectural plans, permits, construction, and finish work. One team, start to finish.We've built dormers on Cape Cods, Colonials, and Ranches across Hicksville, Levittown, East Meadow, Westbury, and Roslyn. Every project is permitted, code-compliant, and built to last.
Our Services
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Renovations
Custom Home Builds
Sell Us Your Home
Dormers
Extensions
Recent Work
Crafting Dream Homes: Custom Home Builds by Madden Development
Discover the artistry and dedication of Madden Development's custom home builds in this captivating case study. Build on our land or yours and work closely with our architectural and design teams to bring your dream home to life. From initial concepts to final construction, our collaborative approach and direct involvement ensure a seamless journey. Experience the joy of crafting a truly customized home that embodies your unique style and reflects your aspirations.
Transforming Existing Homes with Madden Development
Witness the incredible transformations achieved by Madden Development in their case study on renovating existing homes. From adding a second floor to expanding outdated kitchens and transforming backyards into resort-style oases, their expertise and vision shine through. Explore these remarkable projects that have elevated homes to new levels of beauty and functionality.
Empowering Independence through Disability Renovation Services
Discover how Madden Development has transformed homes with their disability renovation services, enhancing functionality and accessibility. From widening door frames to installing ADA compliant fixtures, their projects empower independence and create inclusive living spaces. Explore their remarkable case study examples now.
From Concept to Completion
Consultation and Design
Our project process begins with an initial consultation where we'll discuss your vision, budget, and timeline.
Construction and Installation
Once the design has been finalized and approved, our skilled professionals will begin the construction process.
Final Inspection and Approval
After the construction and installation process is complete, we'll conduct a final inspection to ensure that everything is up to code and meets our strict quality standards.
Everything You Need to Know
We serve Nassau County, NY. Specifically: Levittown, Westbury, Salisbury Estates, Roslyn, and Roslyn Harbor.
We are a full service home renovation company and commercial builder. Whether you want a custom built home, a small remodel, or help with your construction planning, we have it all.
For most projects, it takes a few days to a couple of weeks. For custom design builds it can take longer.
Every job is different, but we only use the highest quality materials for each project. We will work with you throughout the design process to choose top-quality materials that fit your budget and vision.
If you're doing a small remodel or renovation project, you can expect pricing to vary widely based on the size of the project. For custom built homes, our homes start at $500,000.
We will work closely with you in the design process and once construction starts you are welcome to be involved as much as you would like to be. Regardless, we keep constant communication about the status of the project so you are always aware of the progress being made.
Transform Your Home TodaY
Take the first step towards creating their dream living space, by partnering with Madden Development to bring their vision to life.
