Unlock the Hidden Value of Your NYC Property with an ADU

If you’re a New York City homeowner, you already know that space is a precious commodity. But what if your home could do more? Whether it's a basement apartment, a backyard cottage, or a reimagined garage, Accessory Dwelling Units (ADUs) offer an exciting opportunity to make the most of your property—without the stress of moving or selling.

At Second Key, we help homeowners transform underused spaces into fully permitted, beautifully designed ADUs that add real value, flexibility, and comfort to their homes. Whether you're looking to create extra income through rental space, house a family member, or simply expand your living area, an ADU could be the smart solution you've been waiting for.

What Is an ADU, and Why Now?

An ADU (Accessory Dwelling Unit) is a secondary housing unit on a residential property. Think studio apartments in your basement, over-the-garage lofts, or small cottages in your backyard. In recent years, the city has made it easier for property owners to build ADUs legally—and with New York’s housing needs growing, there’s never been a better time to explore your options.

From Idea to Occupancy: We Make It Simple

At Second Key, we offer a start-to-finish service that includes:

• Feasibility & Planning
  We’ll evaluate your property and walk you through what’s possible under NYC zoning laws—with no cost or obligation.

• Financing Guidance
  We connect you with lenders who understand ADU projects, helping you access financing more easily than you might expect.

• Design, Permitting & Construction
  Choose from pre-designed layouts or collaborate with our in-house architects for a custom ADU. We manage everything—permits, construction, and inspections—so you don’t have to.

The best part? Most ADUs are move-in ready within six months of permitting.

Make Every Square Foot Count

Your property has more to offer. Whether you're driven by income potential, multi-generational living, or future-proofing your home, Second Key is here to guide you every step of the way. Let’s unlock the full potential of your NYC home—seamlessly, smartly, and beautifully.

Start your ADU journey today with a free property assessment.