What We Do
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.
01 - Initial Assessment (Free)
02 - 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.
03 - 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.
