Second Key NYC

Second Key provides comprehensive ADU services to New York City homeowners, offering full-service solutions that span feasibility assessment, design, permitting, and construction from initial planning through Certificate of Occupancy. The company differentiates itself through its end-to-end project management approach, financing assistance with ADU-familiar lenders, and a streamlined workflow featuring pre-designed unit options alongside custom configurations, with typical projects reaching move-in readiness within six months of permit approval. Second Key's free ADU assessments serve as the entry point for NYC property owners seeking to understand their specific site constraints and development potential.