Licensed contractor with 10+ years of experience building seamless home additions across Suffolk County and Nassau County. From room additions to full second stories.
At Gonzaga Professional Builders, we specialize in home extensions in Long Island, NY. Whether you need extra bedrooms, a larger living area, an in-law suite, or a full second-story addition, our experienced team builds seamless extensions that look and feel like they were always part of your home.
As a licensed general contractor in Suffolk County and Nassau County, we manage every detail - from architectural planning and permits through foundation work, framing, roofing, siding, and interior finishing. Our in-house architect ensures your extension meets all zoning requirements and building codes.
Add bedrooms, family rooms, or expanded living spaces that seamlessly blend with your home's existing architecture and increase your property's value.
Double your living space by adding a full or partial second story. We handle structural engineering, foundations, and ensure a seamless integration with the existing structure.
Year-round sunrooms with energy-efficient windows, proper insulation, and HVAC integration. Enjoy natural light in a comfortable, climate-controlled space.
Complete self-contained living quarters with bedroom, bathroom, kitchenette, and separate entrance. Designed for comfort, privacy, and code compliance.
Transform your underutilized garage into a functional living space - home office, studio, gym, or additional bedroom with proper insulation and finishes.
Small-scale extensions that expand a single room - kitchens, bathrooms, or dining areas - without the complexity of a full addition. Maximum impact, minimal footprint.
Browse our recent home extension projects across Suffolk County and Nassau County. Every project reflects our commitment to quality craftsmanship.
Over a decade building home extensions across Long Island. We understand local zoning, setback requirements, and construction standards unique to the area.
Fully licensed general contractor with comprehensive insurance coverage. Your home and investment are protected throughout every phase of construction.
Our in-house architect handles architectural drawings, structural engineering, permit applications, and zoning variances - streamlining the entire process.
Detailed written estimates with no hidden fees. We provide honest pricing and keep you informed at every stage of your home extension project.
We coordinate all trades - foundation, framing, roofing, siding, electrical, plumbing, HVAC - so you have a single point of contact.
Every extension is designed to match your home's existing architecture. Matching materials, rooflines, and finishes so it looks like it was always there.
Homeowners want to know who is working inside their home. Gonzaga Professional Builders documents the scope of work, keeps communication clear, and can provide project documentation before construction begins.
License reference: NY Home Improvement Contractor License
General liability and workers' compensation documentation can be reviewed before work begins, so your bathroom renovation is planned with the right protection in place.
Our team helps coordinate permit requirements for bathroom remodeling work involving plumbing, electrical, layout changes, or structural considerations.
Read real Google Business Profile reviews from homeowners who trusted Gonzaga Professional Builders for bathroom remodeling, kitchen renovation, tile work, and high-end finish carpentry across Long Island.
"Chris and his company did an amazing job remodeling my bathroom and not just turning it into the best room in the house, but correcting foundational mistakes committed by the previous builders. His knowledge comes from experience and it was evident in the finished product. I would recommend him to anyone."
"Five stars for Christian at Gonzaga Professional Builders! He completely transformed my kitchen with precision and care. The quality of work is outstanding, and he made the entire remodeling process seamless and stress-free. If you need a professional who truly cares about the final result, look no further!"
"If you're looking for a high-end finish, Gonzaga Builders is the way to go. They just wrapped up our kitchen and the craftsmanship is top-tier - specifically the tile work and the custom molding. Everything is level, tight, and looks exactly how we envisioned it. Professional crew and great communication. Definitely worth the investment."
Want to verify the reputation before requesting an estimate? See the full Google review profile for Gonzaga Professional Builders.
View All Reviews on GoogleWe proudly serve homeowners throughout Long Island, NY. Our home extension services are available in the following areas and surrounding communities:
Home extension costs in Long Island vary widely based on size and complexity. A single-room addition typically ranges from $40,000 to $100,000, while second-story additions can range from $100,000 to $300,000+. Contact us for a free, personalized estimate.
A typical home extension in Long Island takes 3 to 6 months depending on the scope. Simple bump-outs may take 6-8 weeks, while full second-story additions can take 4-6 months. We provide a detailed timeline during your free consultation.
Yes, all home extensions in Suffolk County require building permits, zoning approval, and potentially variances. Gonzaga Builders handles the entire permit and approval process through our in-house architect, including site plans and engineering.
In most cases, yes. We plan the construction phases to minimize disruption to your daily life. For major projects like second-story additions, there may be brief periods where temporary relocation is recommended for safety.
Absolutely. We design every extension to seamlessly blend with your home's existing architecture, matching rooflines, siding, windows, and finishes so the addition looks like it was always part of the original design.
A well-built home extension can add 10-20% to your property's value, depending on the type and quality of the addition. Room additions and in-law suites are among the highest ROI home improvement projects in Long Island.
Contact us today for a free consultation and estimate on your home extension project in Long Island, NY
