Check the Tax Map Office’s final approval and the resulting tax-map record before treating an air-lot number as final. A tentative assignment, DOB approval or recorded agreement answers a different part of the file. If your folder stops at one of those items, name the missing DOF record instead of assuming the change was completed.
Locate the return to DOF, not only the first approval
The current DOF dividing-and-merging-lots page describes initial DOF approval, a DOB step and a return to DOF for completion. It explicitly keeps lot numbers tentative until Tax Map Office final approval.
The currently linked air and subterranean lot guide carries a 2019 marker. It describes an air-lot branch involving a ZLDA recorded in ACRIS, a return packet and the final map action; the subterranean branch differs. Use it to identify records, not as a newly issued filing procedure.
| Record already in hand | Separate record to seek |
|---|---|
| RP-602 or tentative assignment | The later Tax Map Office action |
| DOB subdivision approval | Evidence of the subsequent DOF outcome |
| Recorded air-lot agreement | The final approval and corresponding map change |
| Map showing a lot | Its date and relevant change-history reference |
Keep the documents in their own roles. A number can identify the proposed change while the file is still in process. A recorded agreement can establish which instrument was recorded without answering whether the Tax Map Office completed the application. This guide does not interpret the agreement’s legal effect or determine development rights.
Reconcile a tentative number and a later agreement
Imagine a fictional folder with a tentative lot notice, a later DOB approval and an agreement recorded after both. The dates form a plausible story, but no final DOF action or changed map is included. The latest date belongs to the agreement’s recording; it should not be relabeled as the date the lot became final.
Compare the borough, block and lot references across the three documents. Preserve the existing lot and proposed number separately. If a notice uses an earlier number, do not overwrite it with the later one and lose the connection needed to locate the file.
The useful request identifies that exact gap: the final Tax Map Office approval or return notice for the referenced application, plus the map evidence associated with its outcome. Supply the dates and identifiers already known. If the office provides a correction or return record, retain it rather than choosing only the document that supports the expected result.
A later map may help resolve the question, but match its lot and change reference to the application first. A neighboring change or a different application at the same address can otherwise be mistaken for the missing outcome. Until the connection is documented, describe it as unresolved.
The DOB property-record guide helps with that separate agency’s identifiers. The zoning-exhibit record guide explains matching a recorded document to a DOB filing. Neither makes the recorded instrument a substitute for DOF’s final action.
Choose the system for the record you need
DOF describes Tax Map Tracker as covering up to three years of applications accepted for review. That is a tracker scope, not the age limit of every application or map. An older file absent there is a reason to change the retrieval route, not a finding that it never existed.
The Property Information Portal parent page describes digital maps, Tax Map Office change-request tracking and lot-change history. Its GIS is not a substitute for surveys or boundary evidence. No map, history or live search control was examined here.
For a recorded instrument, the ACRIS parent page describes document images from 1966 onward for Manhattan, Queens, the Bronx and Brooklyn. That date is not an air-lot application or tax-map coverage floor. No ACRIS search, terms acceptance or document image was used.
Treat these as different records routes. Preserve a document identifier when available, but do not assume a match in one system supplies the missing decision in another. A public map display, application tracker and recorded-image index do not answer the same question.
Request the missing action or historical map by name
The NYC311 Tax Map guidance identifies current maps, the Library of Past Tax Maps and the History of Tax Map Changes. It also describes certified-map routes through PIP or the Tax Map Office. These are documented copy routes, not a guarantee that a particular historical version survives.
For an application gap, follow the current DOF parent page’s Tax Map Office assistance instructions. Identify the borough, block, existing or tentative lot, approximate period and known application reference. Specify whether you need the assignment, DOB-linked return packet, approval or correction notice, or a dated map/change-history copy.
Those are useful request details, not verified fields from an observed form. Check the current official appointment instructions before visiting. No appointment, request, order or payment was made, and no delivery or disclosure outcome was established.
A tentative number does not prove final tax-map approval, permit completion, occupancy approval or current safety. Missing online material is not a negative property finding. Last checked October 6, 2026 (2026-10-06 UTC), using current official page text and the linked guide’s text; no property, lot, application or map was queried.