Nassau County's #1 Dormer & Home Extension Contractors — Hicksville, NY
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
Dormer & Home Extension Contractor Nassau County Residents Have Relied On
If you are looking for a dormer contractor or home extension builder in Nassau County that you can trust, Madden Development is the place to go. We have built dormers and home extensions across Long Island for years — and we handle everything from architectural plans and Nassau County permits all the way through construction and final inspection, with one team, no subcontractors, no runaround.
We've built shed dormers, full-width dormers, and home extensions in East Meadow, Levittown, Westbury, Hicksville, Roslyn, Roslyn Heights, Roslyn Harbor, East Rockaway, East Hills, Salisbury, Williston Park, and throughout Nassau County. Our customers know us as the dormer and extension contractor Long Island homeowners call when they want the job done right the first time. We are fully licensed and insured in Nassau County and every project we build is fully permitted and up to code — no shortcuts.Whether you need a shed dormer to convert your attic into two bedrooms, a rear home extension to expand your kitchen, a second floor addition, or a whole house renovation, we do it all. We also build custom homes on your land or ours, and we buy homes directly from Nassau County homeowners who want to sell fast. With 5-star reviews on Google and HomeAdvisor, we are the name Long Island homeowners trust when they want more space without moving.
Why Nassau County Homeowners Choose Dormers Over Moving
Here is something we hear all the time. A family in Levittown or East Meadow has a Cape Cod they love but they have outgrown it. The kids need their own rooms. Maybe they want a real home office or a proper guest suite. They have been looking at listings, dreading the move, running the numbers. Then they call us.A shed dormer on a typical Nassau County Cape Cod adds two full bedrooms and a bathroom in about 10 weeks. It converts dead attic space into real living space that is permitted, code-compliant, and adds serious value to your home. In most cases it costs a fraction of what buying and moving would cost on Long Island right now.That is why dormers in Nassau County are the fastest-growing home improvement project we build. And it is why families in East Meadow, Levittown, Westbury, Hicksville, Roslyn Heights, East Rockaway, Salisbury, Williston Park, Manorhaven, and Glen Head keep calling us.
Our Services
From dormers and extensions to full custom builds — we do it all in Nassau County.
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.
