Real Estate

Tracts, Farms, and the Great Reindexing Project of 1911-1917

Introduction: why archive? 

Archives preserve materials for many reasons, some of which are not immediately obvious. It’s certainly true that some archived items have obvious historic importance, such as the Grand Jury indictments for the murder of Malcolm X.

Indictment, People v. Hagan, Butler, Johnson, 1965, NYDA Closed Case File Collection. NYC Municipal Archives.

Other items combine artistic merit with their historic significance, such as Calvert Vaux’s drawings for the design of Central Park.  

Danesmouth Arch, Central Park, Rendering, 1859, Department of Parks Drawings Collection, NYC Municipal Archives.

Inventory List, Frederick Johnson, 1863, Draft Riot Claim Collection, NYC Municipal Archives.

Most archival collections derive their value from larger social or political themes that scholars discern in studying otherwise humble-appearing documents, such as a payment claim for losses incurred in the notorious New York City Civil War Draft Riots of 1863.    

In three related collections at the New York City Municipal Archives, thousands of cryptic slips of paper bear witness to an enormous but now nearly-forgotten project where dozens of New York City employees labored for years in the service of—you guessed it—Manhattan real-estate records. This is the tale of how New York devoted more than a million person-hours (well, man-hours according to personnel lists) to achieve an apparently quotidian goal: making Manhattan’s property deeds more accessible, in an era where digital searches weren’t possible and using a typewriter to store data was considered technologically advanced. Let’s unpack the story.


The Problem: 600,000 deeds and no single index

Real estate has always ruled Manhattan. By the late 19th century, it was clear that the remaining tracts of open property uptown would soon be developed, and the traditional system of describing property by “metes and bounds”—using descriptors such as a mark cut into the trunk of a large oak tree near the river—was obsolete. Real estate law relies on an unbroken list of transaction records, called a “chain of title,” to assure that someone selling a piece of property is its legitimate owner. The New York State Legislature passed a law in 1891 requiring all subsequent real estate transactions in New York City to use a new block-and-lot system to describe property—the same one used today—but it failed to reckon with 200 years of conveyance records. How to take the 600,000 accumulated deeds, called “conveyances” that were stored in 2,000 fat volumes in the office of the City Register, and convert them to the block-and-lot system?

Furthermore, those old records weren’t organized geographically: the volumes (called “libers”) had been filled sequentially as deeds were brought to the City Register for filing and were indexed volume-by-volume based on the names of the buyers and sellers. Searching through these thousands of volumes was the province of title searchers. Title companies, frustrated with the primitive and archaic system of deed indexing, created their own proprietary indexes which made their searches more efficient and reliable—but assured that access to these public records was for all practical purposes controlled by private firms!

Deed, 1804, Office of the City Register.


The Solution: Reindex 

In 1910 the state legislature addressed the problem by directing the office of the City Register to create its own index of real estate “instruments” that filled the gap between 1891 and the earliest recorded land grants of the 17th century, and to establish trustworthy title chains. The law allocated $100,000 per year for the task, which was expected to take a decade to complete. The City Register created a dedicated Reindexing Department and hired nearly 80 men at salaries ranging from $1,000 to $1,320 per year. The team was put to work preparing summaries of each deed, called an abstract. Once an Abstractor made sense of the deed description and summarized it on a slip of paper, a Locator interpreted the description and attempted to superimpose it on a modern block plan of Manhattan. Once located, a Draftsman drew a map summarizing the work of the Abstractor and the Locator. The work was checked by Examiners and finally signed off by the Chief Surveyor. An elaborate system of review was implemented because the City Register recognized that this was an effort that would never be repeated—it had to be done right the first time. Old property deeds were notoriously difficult to interpret—and often were a challenge just to read!    

Abstracting slip from the Reindexing Department, NYC Municipal Archives.

And yet just three years after the work began in January 1911, outgoing Register Max S. Grifenhagen called reporters into his office and announced that the index, “more comprehensive, more perfect, more exact than is to be found in any other large city in the world,” was complete.(1) The new index was organized geographically and took the form of 12 x 17.5-inch pages (typists were paid 25 cents for each completed index page) filled with chronologically-ordered conveyance data. Manhattan was divided into “key blocks,” each encompassing several city blocks. Every key block featured its own conveyance index with verified liber citations as well as a map showing the names of early owners during the period when Manhattan land was still owned in large pieces called “tracts.”       

Key block map and page from a reindexed block on the Upper West Side of Manhattan, NYC Municipal Archives.

Between 1914 and 1917, the abstracting work was extended to hundreds of thousands of mortgage records. At the same time, the Reindexing Department turned its attention to working out the boundaries of approximately 200 old “farms and tracts” that had once made up most of the privately-owned property above 14th Street. Many of these bore familiar names from Manhattan history: Dyckman, Stuyvesant, Delancey, Astor, Roosevelt. The old conveyance deeds did not contain sufficient information for this task, so the team also drew upon “records on file in the various city departments, historical societies, libraries and in the offices of Trinity Church, Trustees of Columbia College, Sailor’s Snug Harbor and many other similar offices.”(2) As the data was gathered in the form of 6.5 x 10-inch slips organized into more than 1,000 “Tract Reports,” draftsmen distilled the information into 46 plates collectively called the General Map of Tracts and Farms, encompassing all of Manhattan. The draftsmen used an interesting system of lettering:  the names of owners were written in a mashup of styles and sizes designed to make it easier to distinguish overlapping names.    

Tract and Farm Plate 34, R.D. Map Collection, NYC Municipal Archives.


Job (almost) Done! 

The Reindexing team still wasn’t finished—they next converted data on each original farm or tract into a narrative document called a Farm History. A Farm History begins with narrative text from 2 to 22 pages long describing the extent of the original property and presenting an outline of the transactions that broke it into pieces. Many of the Farm Histories include one or two beautiful maps superimposing the farm onto a modern Manhattan block map, as well as a kind of descendancy chart akin to a family tree, with landowners’ names presented as if they were generations of children who bought or inherited pieces of the original farm. Each line of descent terminated in a reference to the city blocks that make up the land owned by the most recent names on the chart. In a 1917 summary of the work of this office, City Register John J. Hopper wrote that “a reference to the proper farm history is made in the front of each block,”(3) by which he meant in the conveyance index volumes. This was never done, nor do the farm histories appear to be complete: only about two dozen out of 120 bear approval dates, and many lack texts, maps, or descendancy charts. Genealogist and historian Aaron Goodwin has speculated that World War I may have interfered with the project’s completion.(4) 

James W. De Peyster Farm, Farm Histories Collection, NYC Municipal Archives.

Ownership Descendancy Chart for the Dutch colonial era farm of Jacobus Van Orden, Farm Histories Collection, NYC Municipal Archives. 


So, How Much of this Stuff is in the Municipal Archives? 

This largest output from the Reindexing project were hundreds of index volumes.  Those remain in the City Register’s office in Jamaica, Queens, because after more than 100 years, they’re still in active use! The original conveyance libers through 1886 have been scanned and are available online.(5) The Municipal Archives holds three collections at its 31 Chambers Street location:

  • ACC 1983-037, consisting of large original sheet maps that show the location and boundaries of old tracts and farms together with the names of their owners and Tract Report references. 

  • ACC 1983-038, consisting of approximately 1,000 Tract Reports on slips of paper that were used to create ACC 1983-037 and ACC 1983-039. 

  • ACC 1983-039, consisting of approximately 100 Farm Histories with text, maps and descendancy charts of ownership. The Farm Histories are available on a microfilm in the Reading Room of the Municipal Library at 31 Chambers Street.   Please consult the Municipal Archives Collection Guide for additional information about the Office of the City Register Reindexing Department maps, tract reports, and farm histories. 


A Final Word 

Returning to the theme of modest-looking archival materials that bear witness to colossal efforts made by city employees performing tasks that must have been tedious at best, the efforts of the World War I-era Reindexing Department of the City Register have benefitted generations of property owners, local historians, and—yes—attorneys. The names and addresses of the Reindexing Department team members were published in The City Record along with their salaries and hire dates.(6) A handful were even photographed for a 1913 newspaper story about the department,(7) so let them be anonymous no more!  

Members of the Reindexing Department, July 1916, NYC Municipal Archives. 

The reindexing team at work in 1913, NYC Municipal Archives. 


(1) “Title searching in N.Y. County Simplified.” NY Tribune 21 Dec 1913, page 34.

(2) John J Hopper 1917, Four Years Report Showing the improvements made during the years 1914-1917 in the Register’s Office, of New York County, with recommendations for its future growth and advancement, pages 43-44

(3) Hopper, loc. cit.

(4) Aaron Goodwin. 2016 New York City Municipal Archives: An Authorized Guide for Family Historians, page 104

(5) “United States, New York Land Records, 1630-1975.” https://www.familysearch.org/search/collection/2078654

(6) The City Record 31 Jul 1916 Supplement 9, page 245.

(7) “Title Searching in N.Y. County Simplified,”loc. cit.

The Manhattan Department of Buildings Docket Book Collection, 1866-1959

This blog will describe the Manhattan DOB docket book collection; future blogs will provide information about extant docket books for the other boroughs.

On June 9, 1977, Eugene J. Bockman, Director of the Municipal Reference and Research Center (and the first Commissioner of the Department of Records and Information Services), wrote to Department of Buildings (DOB) Commissioner Jeremiah T. Walsh alerting him to “. . . a potentially dangerous situation” regarding the DOB docket books dating from 1866 through 1915. 

In the 1970s, the DOB was located on the 20th floor of the Municipal Building and the docket books were on open shelves in a public hallway outside their offices. Bockman explained that it had been brought to his attention that the docket books were being “borrowed” for periods of time and not always returned. Bockman offered to house the books in the Municipal Reference and Research Center, located on the 22nd floor of the Municipal Building. He noted that they would be under “constant supervision” by the librarians but still easily accessible to DOB staff and others requiring access.

“The docket books . . . are extremely valuable historical resources,” Bockman added.

Walsh granted Bockman’s request and the pre-1916 docket books were moved to the Library. Three years later, in March 1980, the Municipal Archives accessioned the docket books from the Library. Municipal Archives staff working on the grant-funded Manhattan Building Records project at that time made frequent use of the docket books. In April 1982, the Municipal Archives accessioned the docket books dating from 1916 through 1959 from the DOB. During the 1980s, the Archives solicited donations to re-bind several of the earliest volumes. The Archives microfilmed the entire docket book series in 1989.

Manhattan Department of Buildings Alteration Docket Books. Manhattan Department of Buildings Docket Book Collection, 1866-1959. NYC Municipal Archives.

There are five series in the docket book collection:

  1. New Building Application dockets, 1866-1916, (31 volumes)

  2. New Building Docket Application Index dockets, 1866-1911, (29 volumes)

  3. Alteration Application dockets, 1866-1910, (29 volumes)

  4. Alteration Application Index dockets, 1866-1915, (37 volumes)

  5. Application dockets, 1916-1959, (151 volumes).

On June 4, 1866, the DOB began requiring the filing of written applications, with plans, for the construction of new buildings or alterations to existing structures. They began recording summary information about each application in large, ledger-type books. Prior to 1916, they maintained separate ledgers for new building and alteration applications, and alphabetical indexes to each series.  

Left and right pages of the New Building application docket book from 1880. No. 829 is the application to building no. 1 West 72nd Street, later known as the “Dakota” apartment building.

The building application was filed with the “French Flats” classification, a designation the DOB used after 1874 to denote a multi-family dwelling with more amenities designed to appeal to middle-class families. Manhattan Department of Buildings Docket Book Collection, 1866-1959. NYC Municipal Archives.

The New Building and Alteration Application ledgers are organized in column format on two facing pages in two sections; across the top of the page and then continuing across the lower portion. The pre-1916 ledgers record extensive information about each application.

Reading left to right, headings at the top of the left-hand page:

  • Plan no. /Date Submitted /Location /Street No. /Owner /Architect /Building /Ward No.

Reading left to right, headings at the top of the right-hand page:

  • Value /Size of Lot /Size of Building /Height in Stories /Foundation Specifications /Upper Walls Specifications /Materials of Front /Type of Roof /Material of Cornice.

Reading left to right, headings at the lower half of the left-hand page:

  • Plan No. /Iron Shutters /Configuration of Roof /Access to Roof /Type of Walls /Strength of Floors /Trap Doors /Fire Escapes /Type of Furnaces /Type of Building (1st Class Dwelling, 2nd Class Dwelling, etc.)

Reading left to right, headings at the lower half of the right-hand page:

  • Approved /Not Approved /Amended and Approved /Date Commenced /Date Completed /Name of Inspector /Remarks.

In April 1916, the Manhattan office of the DOB began recording docket book information on 10 ½” square typewritten forms bound into volumes.  

The new typewritten form also coincided with an expansion in the number and types of applications recorded in the docket books. In addition to the New Building (NB) and Alteration (ALT) applications, the ledgers also included Demolition Permits (DP), Building Notices for minor work (BN), Electric Sign applications (ES), Dumbwaiter installations (DW), Sign Applications (SA), Computations (determination of safe floor loads), Elevators (sometimes accompanying alteration or new building applications), and Plumbing & Drainage Applications (P &D).

New Building (NB) Applications filed April 23, 1931. These entries include the first building applications for Rockefeller Center, including the RCA Building (NB 77 of 1931) and an early, unbuilt version of Radio City Music Hall (NB 78 of 1931). The entry is the only extant government record for this structure since the application itself was disposed when it was withdrawn. Manhattan Department of Buildings Docket Book Collection, 1866-1959. NYC Municipal Archives.

The typewritten format adopted by the DOB in 1916 improved legibility and permitted more narrative accounts, especially important for alteration applications. Alteration application 176 of 1931 pertaining to 35 Beekman Place is an example. It had been built as a private residence in 1866, and later altered to a tenement (i.e. multi-family dwelling) when the area became less desirable. As recorded in the 1931 application, the building would be altered back to a single- family residence in keeping with the revival of Beekman and Sutton Places as fashionable residential neighborhoods. Manhattan Department of Buildings Docket Book Collection, 1866-1959. NYC Municipal Archives.

New Building Application Index, 1880. Manhattan Department of Buildings Docket Book Collection, 1866-1959. NYC Municipal Archives.

There are several ways to find a docket book entry.

If the New Building application dates between 1866 and 1911, or the Alteration application dates between 1866 and 1915, the index volumes can be searched to identify the application number and relevant entry in the NB or ALT dockets. The indexes are based on location—i.e. street address of the building. In many instances, the location is rendered in distance from a street or avenue. For example an entry in the 1880 NB index for the letter “E” written as “83 S.S. 125’ W. 10th” translates to: 83rd Street, South Side, 125-feet west of 10th Avenue. It is also important to note that street names may have changed in the succeeding decades. For example, the Dakota Apartment building, is listed on the 1880 index under the letter “E” for Eighth Avenue; the name change to Central Park West did not take place until the 20th century.

Another avenue to identifying application numbers is the Department of Building’s website. Entering building address or block and lot numbers into the search box on their Building Information System (BIS) brings up a “Property Profile Overview.” At the bottom of that screen there is a “select from list” box where the application type, e.g. NB—New Building, can be chosen. After clicking “show actions” the relevant New Building application number will appear in the search results. Using the Dakota apartment building again as an example, entering the current address, 1 West 72nd Street results in NB 829-80* in the search result. (The asterisk indicates the date is 1880, not 1980.)

Another approach is using the searchable database created by the Office for Metropolitan History (OMH). Founded in 1975 by the late Christopher Gray, an architectural historian and journalist (he wrote the popular “Streetscapes” column in the Real Estate section of The New York Times from 1987 to 2014), the OMH website is another excellent resource for identifying New Building applications filed after 1900. The OMH data was entered from building application information published in the Real Estate Record and Builders Guide. Digitized copies of the Real Estate Record, 1868 through 1922, are available from Columbia University Libraries Digital Collections.  Although the online Real Estate Record is not a particularly user-friendly tool, it is still a great resource for the pre-1900 information not available in the OMH database.

New Building Applications Filed March 30, 1922. Application no. 188 for a two-story fireproof garage. It was designed by architect Hector C. Hamilton. Manhattan Department of Buildings Docket Book Collection, 1866-1959. NYC Municipal Archives.

Tunnel Garage, 1940 Tax Photograph Collection. NYC Municipal Archives.

The OMH database is particularly useful for researching demolished buildings, or finding information that isn’t on the DOB website. In 2006, a building known as the “Tunnel Garage,” located on Broome Street, near the entrance to the Holland Tunnel, was demolished despite a vigorous campaign by preservationists. According to the Greenwich Village Society for Historic Preservation, the garage had been admired for its “bold graphic lettering, its green and orange terra cotta ornamental accents, its original casement windows, and its striking rounded corner.” It fell into disrepair during the 1980s and was replaced by a nine-story luxury condo. Perhaps tenants of the new building might want to know something about what previously stood on the site. If they did, the answer is readily available by entering address data into the OMH database: NB application: no. 188 of 1922.

The Municipal Archives’ related collection, the Manhattan DOB ‘block and lot folder’ series also serves as an option for identifying application numbers for buildings in lower Manhattan, below block 965. As described in previous blogs [add link], the “block and lot folder” portion of the DOB collection contains the original written applications. Most folders show the application contents listed by application number. But if the application is missing from the folder, the docket books can at least supply summary information.

In addition to providing information about specific buildings, the docket books serve to document the work of architects practicing in the city, and general research on the built environment. Mosette Broderick, Clinical Professor of Art History, New York University, spent many hours at the Archives in the early 1980s reviewing all the New Building and Alteration docket books from 1866 through 1910. “I learned how the city grew,” Professor Broderick remembered in a recent conversation. By tracking new building location information in the dockets she could see patterns of development. She also added that she discovered several smaller, less well-known projects by the renowned architect Stanford White in the dockets.

Eugene Bockman’s remark about the importance of the docket books was accurate and prescient. They have served generations of researchers and future digitization (they are on the priority list) will enhance their significance.