What is NYC Class D?
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)
Typical characteristics
- 6+ stories — elevator required by code
- Typical unit counts: 40–400+ per building
- Pre-war and post-war architectural types
- Often rent-stabilized (large pre-1974 buildings) or condo/coop
- Common in Manhattan, Queens (Elmhurst, Rego Park), Bronx (Riverdale)
Applicable laws & regulations
- HPD Multiple Dwelling Law fully applies
- FISP (Local Law 11) applies — 5-year façade inspection required
- LL97 applies if 25,000+ sqft
- LL84 benchmarking applies
- Annual boiler inspection
- Annual elevator Cat-1 + 5-year Cat-5
- Rent stabilization likely (pre-1974 6+ units)
- LL152 gas piping inspection (every 4–5 years)
Common compliance issues
- FISP façade violations (Unsafe or SWARMP conditions)
- Elevator out-of-service violations and emergency repair costs
- LL97 carbon penalties (older gas-heated buildings)
- Boiler condemnation and emergency replacement
- Rent overcharge / DHCR registration disputes
- HPD lead paint enforcement in pre-1960 units
- Parapet and roof inspection non-compliance
Common zoning districts
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.
Class D sub-codes
| 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 |
Frequently Asked Questions
Where do I find my NYC building class?
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).
Can my building's class change?
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.
What compliance obligations apply specifically to Class D?
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).
Does a Class D designation affect resale value?
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.
How does RegWatch use building class data?
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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