Expert Home Addition Contractor NYC
We offer dependable roof waterproofing services in NYC for residential, commercial, and multi-unit properties, using high-quality materials, skilled installation, and durable long-term warranties.
Trusted Roof Waterproofing Contractors in NYC
If you are looking for reliable and long-lasting roof waterproofing services in NYC, our experienced team offers complete solutions to protect your residential and commercial roofs from leaks, water damage, and structural issues.
We use advanced materials and proven techniques to safeguard all types of roofs, including flat roofs, concrete roofs, metal roofs, and rooftop terraces. New York’s extreme weather can quickly damage unprotected surfaces, which is why our professional approach ensures durable, long-term protection.
Whether your roof has cracks, leaks, or signs of moisture damage, our services provide effective solutions and peace of mind. We also offer roof maintenance, flat roof waterproofing, and commercial and residential roof protection to keep your property safe year-round.

Our Commercial Roofing Services
Commercial Roof Installation
Commercial Roof Repair
Commercial Roof Replacement
Flat Roof Solutions
Roof Maintenance & Inspections
Emergency Commercial Roofing
Why Commercial Roofing Matters
- Protects your building from leaks, water damage, and structural issues
- Extends the lifespan of your commercial roof
- Reduces maintenance costs and emergency repairs
- Enhances energy efficiency and insulation
- Ensures safety for employees and occupants
Service Areas
- Brooklyn
- Queens
- Manhattan
- Bronx
- Staten Island
- Nassau County
FAQs About Home Addition Contractors
What services do home addition contractors provide?
Home addition contractors like Liberty GCNY offer a wide range of services, including room additions, second-story expansions, rooftop build-ups, rear extensions, garage conversions, sunrooms, and in-law suites. These services are tailored to enhance your living space while maintaining the architectural integrity of your home.
How do I choose the right home addition contractor in New York City?
Choosing reliable home addition contractors involves checking for proper licensing, insurance, experience, and customer reviews. Liberty General Contracting is a trusted name in NYC, offering fully managed design-build services and transparent project estimates.
What is the cost of hiring home addition contractors?
The cost varies depending on the project type and size. On average, rear extensions cost between $150,000 and $300,000, while rooftop additions can exceed $500,000. Our home addition contractors provide detailed pricing that includes materials, permits, and labor.
Do your home addition contractors handle permits and approvals?
Yes. We manage all necessary permits, including NYC Department of Buildings filings and approvals from the Landmarks Preservation Commission if applicable. Our home addition contractors ensure your project meets all legal and safety requirements.
Are Liberty's home addition contractors licensed and insured?
Absolutely. Liberty GCNY is fully licensed, bonded, and insured across New York City, Long Island, and Westchester County. All our home addition contractors follow strict building codes and safety regulations to ensure top-quality results.
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