Multi-family buildings with elevators — mid-rise and high-rise residential. Class D is elevator-served apartment housing.
NYC DOF Class D · Residential · ~8,500 buildings (~650,000+ units)
Class D is an NYC Department of Finance building classification for multi-family buildings with elevators — mid-rise and high-rise residential. Class D is elevator-served apartment housing. This is Manhattan's pre-war and post-war rental stock (Upper West Side, Upper East Side, Midtown) plus the outer-borough tower complexes (Co-op City, Rochdale Village, Lefrak City).
Class D is elevator-served apartment housing. This is Manhattan's pre-war and post-war rental stock (Upper West Side, Upper East Side, Midtown) plus the outer-borough tower complexes (Co-op City, Rochdale Village, Lefrak City). Compliance obligations are the heaviest of any NYC building class.
Family: Residential · Approximate NYC count: ~8,500 buildings (~650,000+ units)
Class D buildings are typically found in: R7-2, R8, R8A, R8B, R9A, R10, R10A
Zoning determines bulk, density, and use. Checking your building's zoning alongside its class reveals what's legally possible on the lot.
| Sub-code | Meaning |
|---|---|
| D0 | Elevator co-op, Conversion from loft |
| D1 | Elevator apartment (semi-fireproof, without stores) |
| D2 | Elevator apartment (artists in residence) |
| D3 | Elevator apartment (fireproof, without stores) |
| D4 | Elevator cooperative |
| D5 | Elevator apartment with converted lofts |
| D6 | Elevator apartment with stores (fireproof) |
| D7 | Elevator apartment with stores (semi-fireproof) |
| D8 | Luxury elevator apartment |
| D9 | Miscellaneous elevator apartment |
Your building class is set by the NYC Department of Finance and published in PLUTO (Primary Land Use Tax Lot Output) maintained by the Department of City Planning. You can look it up by searching your address on RegWatch, or directly on the DCP ZoLa portal using the lot's BBL (Borough-Block-Lot).
Yes, but it requires a formal change. A Class D designation reflects the building's current use and configuration. Renovations that change the fundamental use (adding units, converting commercial to residential, or condo conversion) require a new Certificate of Occupancy from DOB — which may result in a new class code being assigned by DOF on the next assessment.
HPD Multiple Dwelling Law fully applies. FISP (Local Law 11) applies — 5-year façade inspection required. LL97 applies if 25,000+ sqft. Full list above. Note that RegWatch property reports automatically calculate which obligations apply based on your building's specific characteristics (class, size, stories, construction year, occupancy).
Indirectly — classification drives which regulations apply, which affects operating costs, insurance rates, and buyer expectations. Commercial classes (O, K) have different financing and diligence norms than residential (A–D). Mixed-use (S) adds complexity. Condos (R) are valued per-unit rather than per-building. Buyers and lenders always verify classification during due diligence.
We use building class to determine which compliance obligations, deadlines, and violation patterns are relevant to each property. A Class D elevator building gets different risk flags than a Class B two-family home. This drives the per-property compliance calendar, risk scores, and vendor matching.
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