Our Services
We work with homeowners in New York City who are exploring the potential of their property — whether to generate rental income, house family members, or increase long-term property value.
Initial Assessment (Free)
Feasibility & Pre-Construction Advisory
We start with a paid feasibility study – a detailed look at what you can build and what it will cost. From there, we’ll assemble your project team, coordinate design and permitting, and deliver a detailed cost estimate and schedule so you can move forward with a clear plan.
We manage and execute the build - on time, on budget - with a team that has deep
NYC real estate development and construction experience. We’ll then guide you through the Certificate of Occupancy.
Construction Management
Who We Service
We work with homeowners in New York City who are exploring the potential of their property — whether to generate rental income, house family members, or increase long-term property value.
Why Second Key?
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Deep real estate development expertise — we understand every phase of the project lifecycle
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One of the few licensed NYC General Contractors specializing in ADU
construction -
Pre-construction advisory included —strategic planning before a single permit is filed
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Committed to making ADUs accessible to everyday NYC property owners
Our Mission
ADUs represent a powerful opportunity for NYC property owners to unlock value while contributing to the city’s housing supply. Our mission is to make that opportunity accessible, through expert guidance and high-quality construction, for every eligible homeowner, not just those with extensive resources or insider connections.
