A converted loft and its Certificate of Occupancy
In a building that began as a warehouse or factory, the first document to ask for is the Certificate of Occupancy, and the second is whether the building is, or ever was, covered by the Loft Law. New York State passed Article 7-C of the Multiple Dwelling Law in 1982. It created a new class of buildings, interim multiple dwellings: former commercial or manufacturing buildings where three or more families, each living independently, made their homes during the window of April 1, 1980 to December 1, 1981, and amendments in 2010, 2013, 2015 and 2019 followed (Loft Board). Section 282 of that law establishes the New York City Loft Board, which oversees conversion "to safe, rent-stabilized residences". Whether a building has that history is a question for the seller, the board and the DOB file. The Building Information System shows the certificate on record; a certificate describing a use that does not match the apartment being sold is a matter for your attorney before contract.
Zoning here has its own chapter: the Special Tribeca Mixed Use District, Zoning Resolution Article XI, Chapter 1 (ZR Article XI, Chapter 1). The SoHo-NoHo rules on joint living-work quarters for artists belong to a different special district.
Five historic districts, designated from 1991 to 2002
The Landmarks Preservation Commission designated the Tribeca West Historic District on May 7, 1991 (LP-1713); its report runs along Harrison Street, Franklin Street, North Moore Street and Greenwich Street. Three more followed on December 8, 1992: Tribeca North (LP-1714), whose report takes in Laight Street, Vestry Street, Desbrosses Street and Hubert Street; Tribeca East (LP-1711), reaching White Street, Walker Street and Leonard Street; and Tribeca South (LP-1712), with Duane Street, Reade Street and Thomas Street. The Tribeca South Historic District Extension was designated on November 19, 2002 (LP-2122). The maps in those reports, not street names alone, settle whether a particular building is inside a district.
Inside a district, the Commission requires a permit "before doing work that affects the exterior" of a designated property, and in some cases the interior (LPC applications). For a loft, that reaches the cast-iron or masonry street front, the large window openings, loading-dock canopies and any rooftop addition or mechanical unit. A sixth district sits in the same official area but not in Tribeca: the African Burial Ground and The Commons Historic District, designated February 25, 1993 (LP-1901), lies in the Civic Center part of the city's Tribeca-Civic Center area.
The official area's numbers
The city's tax-lot file (PLUTO) counts 12,249 residential units on 622 lots in the Tribeca-Civic Center area (NTA MN0102). By type, 50.2% of those units are condo, 35.5% elevator rental, 7.7% co-op and 1.5% walk-up, with one-family houses at 0.2%. By age, 46.0% are in buildings from before 1940, 14.6% from 1940 through 1979 and 38.3% from 1980 on. Those counts include the Civic Center blocks. Type and age are separate counts in the file and cannot be matched to each other; one-family houses are close to absent.
Trains inside and around the district
Four station points in the MTA list fall inside the Special Tribeca Mixed Use District (data.ny.gov): Franklin St (1), Chambers St (1 2 3), Chambers St (A C) and Canal St (A C E). Five more sit elsewhere in the Tribeca-Civic Center area, on its Civic Center side: World Trade Center (E), Park Place (2 3), City Hall (R W), Chambers St (J Z) and Brooklyn Bridge-City Hall (4 5 6). The dataset flags Chambers St (1 2 3), World Trade Center (E), Chambers St (J Z) and Brooklyn Bridge-City Hall as accessible; confirm with the MTA before counting on it. Census ZIP-code tabulation areas 10007 and 10013 intersect the special district (TIGERweb).
Water on the maps, and the barrier plan
Two FEMA maps apply to the Tribeca-Civic Center area. The one in effect shows Zone AE and 0.2%-annual-chance flood hazard areas within it (effective NFHL); the pending preliminary map adds VE zones at its shoreline (preliminary NFHL). Check any specific address at the FEMA Flood Map Service Center. The Battery Park City Authority's North and West project describes a deployable barrier crossing West Street "to an assigned elevation point in Tribeca" (resilience projects), though that page's schedule is out of date. A loft building with a cellar or ground-floor mechanical room is worth asking about, along with whether the building carries flood insurance and what it covers.
Scope of a loft walkthrough
In a converted industrial building the walkthrough typically begins at the big window openings set in old masonry: frames, operation and any water marks around them. Next come the systems that such buildings typically received well after construction, the unit's own heating and cooling equipment and its kitchen and bath ventilation, then the plumbing fixtures and whatever supply and drain piping is exposed along long horizontal runs. The panel, its circuits, receptacles and fixtures follow, along with any staining or damage that suggests water from the floor above or through an outside wall. The freight elevator, the roof, the sprinkler system, the facade and the board's finances are building matters, answered by the DOB file, the offering plan and the managing agent.