Legalized Basement Conversion in Brooklyn, Queens & NYC

Want to turn your basement into a legal, livable space? King Stone Builder & Construction Inc specializes in basement legalization services that meet all NYC building codes and zoning regulations. Whether you're creating a rental unit or additional family space, we handle every step from inspection to approval.

Legal Basement Conversions Made Easy

New York City's laws for basement use are strict — and violations can lead to fines or eviction. Our experienced team ensures your basement meets all Department of Buildings (DOB) requirements for ceiling height, egress, ventilation, plumbing, and fire safety.

Why Homeowners Trust King Stone for Basement Legalization

• Fully Licensed & Insured NYC Contractor
• 30+ Years of Basement Conversion Experience
• We Work With NYC DOB, Architects & Inspectors
• Complete Buildout: Framing, Plumbing, Electrical, Flooring
• Serving Homeowners Across Brooklyn, Queens & The Bronx

Maximize Your Property's Potential

Legalizing your basement can add usable square footage and boost your home's value. We've helped homeowners in Canarsie, Ridgewood, East Flatbush, and beyond get full legal approval for their basement spaces. Contact us today or call 917-667-7802 to get started.