Find out what you can build.
Enter your address and get a free ADU feasibility report for your property. We analyze zoning, lot size, existing structures, and more to show you which ADU types work for your lot.
We check four ADU types for your property.
Our tool analyzes your lot against NYC’s zoning rules and generates a feasibility report covering four ADU types, each with maximum size, a site diagram, and a detailed eligibility breakdown you can download as a PDF.
Garage conversion
Convert your existing garage into a self-contained living space without changing the building footprint.
Garage demo & rebuild
Demolish an existing garage and rebuild a larger ADU in its place, expanding beyond the original footprint.
Attached ADU
An addition connected to your primary home, like a side extension or rear bump-out that shares a wall.
Detached backyard ADU
A standalone structure in your backyard, separate from your main home. The highest-value option.
Your personalized feasibility report.
Each report includes your property data at a glance (zoning district, lot area, FAR, building class) plus a detailed breakdown of each ADU option with maximum square footage, site diagrams, and the specific checks we ran. Download it as a PDF and bring it to your free consultation with Haven.
- Property data: zoning, lot area, FAR, building class
- Four ADU types evaluated
- Maximum size calculated for each option
- Site diagrams showing buildable area
- Downloadable PDF you can share
ADU eligibility, answered.
Common questions about using Haven’s eligibility tool and understanding your ADU feasibility report.
What is an ADU?
An Accessory Dwelling Unit is a small, self-contained home added to your property, whether in the backyard, attached to your house, or by converting a garage. NYC recently updated zoning rules to make ADUs easier to build.
What does the eligibility tool check?
We analyze your zoning district, lot area, building footprint, FAR, flood zone status, historic district designation, and more, all using publicly available data from NYC's Department of City Planning.
What ADU types does the report cover?
Up to four: garage conversion, garage demo & rebuild, attached ADU, and detached backyard ADU. Each is evaluated independently based on your property's specific constraints, with maximum square footage and site diagrams.
Is the eligibility check free?
Yes. Enter your address and get your full feasibility report at no cost, with no signup required. You can download the report as a PDF to share with family, an architect, or a contractor.
How accurate is the report?
The report is a preliminary feasibility assessment based on PLUTO data, building footprints, and zoning maps. It is not a guarantee of permit approval. A site survey and DOB review is required before construction.
What if none of the options are eligible?
The tool checks against publicly available data, which may not reflect recent changes. If your result is unclear, schedule a free consultation. Our team does manual zoning reviews and can identify options the automated check might miss.