New Construction (Ground-Up Builds)
Complete new home construction from foundation to finish. Building from the ground up gives you the opportunity to create exactly the space you envision.
Building from the ground up is the ultimate way to get exactly the home or space you want. JZ Development provides full-service new construction across Long Island, managing every phase from site preparation and foundation to framing, mechanicals, and finish work.
Our new construction services include custom homes, home additions, accessory dwelling units (ADUs), detached garages, workshops, and commercial build-outs. We work with your architect and engineer — or can recommend professionals we trust — to develop plans that meet your needs and comply with local building codes.
Project management is where we shine. Building new requires coordinating dozens of trades, inspections, material deliveries, and schedules. Our experienced team manages all of this so you have one point of contact and clear communication throughout the build. We provide regular progress updates and address issues promptly.
Whether you're building your dream home, adding living space with an addition or ADU, or constructing a commercial space, JZ Development delivers quality construction on Long Island. We work within your budget to make smart decisions on materials and finishes — getting you the most value without compromising quality.
Home Additions & Room Expansions
Seamless home additions that extend your living space — room additions, second-story additions, bump-outs, and full-floor expansions. We match the new construction to your existing home's style and structure.
Accessory Dwelling Units (ADUs)
Detached cottages, garage apartments, and basement conversions that add independent living space to your property. We navigate Long Island's ADU zoning requirements and handle the full build from permits to finish.
Custom Garage & Workshop Construction
Detached garages, workshops, and outbuildings built to your specifications. From basic storage to fully finished spaces with electric, insulation, and custom features.
What We Do
- Custom home construction
- Accessory dwelling units (ADUs)
- Garage & workshop buildings
- Commercial build-outs
- Additions & expansions
- Detached structures
- Site preparation
Explore Our New Construction Services
New Construction Across Long Island
We provide new construction services throughout Nassau and Suffolk County:
Our New Construction Projects
Browse examples of our new construction work across Long Island.
Frequently Asked Questions
How long does it take to build a new home on Long Island?
A custom home build on Long Island typically takes 8-14 months from breaking ground to move-in, depending on size, complexity, and weather. This doesn't include the planning and permitting phase, which can add 2-6 months. We provide a detailed timeline during the planning phase.
Do you handle building permits for new construction?
Yes. We manage the entire permitting process with your local building department, including plan submissions, inspections, and certificate of occupancy. Navigating Long Island building codes and zoning requirements is something we do every day.
What is an ADU and can I build one on Long Island?
An ADU (Accessory Dwelling Unit) is a secondary living space on your property — like a detached cottage, garage apartment, or basement unit. ADU regulations vary by municipality on Long Island, and recent NY State legislation has expanded where they're allowed. We can help you determine what's possible on your property.
Do you build additions onto existing homes?
Yes. Home additions are one of our core services. Whether you want to add a room, expand a floor, or build up, we handle the structural engineering, foundation work, framing, and finish work to seamlessly integrate the addition with your existing home.
How much does it cost to build a home on Long Island?
New home construction on Long Island typically ranges from $200-$400+ per square foot depending on finishes, complexity, and site conditions. A custom home may range from $400,000 to well over $1 million. We provide detailed, transparent estimates and work with you to make smart material and design decisions that get the most value out of your budget — there's always a way to build smart without cutting corners.
How much does a home addition cost on Long Island?
Home additions on Long Island typically cost $150-$350 per square foot, depending on the type of addition and finishes. A basic room addition may start around $50,000, while a second-story addition or a large family room expansion with bathroom can run $100,000-$250,000+. We provide free, detailed estimates based on your specific project.
Can I add a second story to my ranch-style home?
In many cases, yes. Adding a second story to a ranch requires assessing the existing foundation's capacity to support additional load, as well as local zoning setback and height requirements. We work with structural engineers to determine feasibility and can design a second-story addition that transforms your ranch into a colonial or cape-style home.
How long does it take to build a home addition on Long Island?
A typical home addition on Long Island takes 3-6 months from breaking ground to completion, depending on size and complexity. This doesn't include the design and permitting phase, which can add 1-3 months. Simple room additions may be faster; second-story additions and complex projects take longer.
Ready for Your New Construction Project?
Get a free estimate for your new construction project on Long Island. We're here to answer your questions and help bring your vision to life.