Zoned

Row houses on Concord Avenue, facing the jail’s construction site, under manufacturing zoning since 1961.

The ground, as the City maps it today

Concord Avenue between East 141st and East 145th Streets has been mapped for manufacturing since 1961, and people live on it. Five changes have rezoned parts of it: two map amendments in 1964, whose applicants no record names, and three applications since 2019: the City’s, for its own land, and two developers’, for housing.

Concord Avenue between East 141st and East 145th Streets carries thirty-five tax lots. In December 1961 the City’s new Zoning Resolution placed all thirty-five in an M1-1 manufacturing district.1

For four of them, the change out of M1-1 is dated. A City Planning Commission report of December 2024 states that its project area “was initially within an M1-1 zoning district in 1961 and was rezoned to the current M1-2 zoning district in 1964.” That project area includes three corridor lots whole and part of a fourth. It is the Commission’s account of a block’s history, not the amendment itself.2

For twenty-eight of the thirty-five, the change out of M1-1 is not dated anywhere in the record. It happened between the 1961 designation and 20 January 1977. The map above says so on the ground itself: M1-1 from 1961, M1-2 before 1977. A line would assert a date the record does not carry.3

Four of them are dated only at second hand, by the 2024 report, and those four are among the six that later moved by application. Two amendments are dated first-hand, read from the City’s own zoning sheet: one effective 9 April 1964, which changed the block south of East 142nd Street, which today contains 320 Concord Avenue; and one effective 28 May 1964, which changed the block on the east side of Concord Avenue between East 142nd Street and St Mary’s Street, which today contains 358 and 382 Concord Avenue. They are the only actions on this street the archive can date between 1961 and 2019. The sheet draws streets and district boundaries and names no lots: it is good evidence about a block and silent about which lots were in it, and the lots named here are the ones that stand in those blocks today. Four lots dated at second hand, three dated first-hand: twenty-eight are not dated at all.

Twenty-seven lots unchanged since M1-2 was applied

Twenty-seven of the thirty-five have carried M1-2 since it was applied, including 327, whose building is gone. No amendment, no application, no variance touched any of them. They sit across four blocks.

Seventeen of them run without interruption along one block face, together with a lot whose building is gone — eighteen contiguous lots on a single block, the longest unbroken stretch in the corridor.

In the zoning record they are undifferentiated, and that is the finding. A reader looking for the exception in this stretch will not find one. No application was ever brought for any of them; nothing distinguishes one from the next.

They are not undifferentiated everywhere. The same eighteen lots carry twenty-five housing enforcement cases, all recorded as closed.

So the street is legible to one instrument and invisible to another, on the same ground. Housing enforcement has been active throughout. Neither instrument sees what the other sees, and neither is wrong — they are asking different questions of the same eighteen buildings, and only one of them has ever been asked about this block at all.

Under the manufacturing zoning that has covered this row since 1961, a home can stay, but it can barely grow, and it cannot come back.4 No new home may be built on the lots zoned M1-2:5 the Zoning Resolution allows homes only in the manufacturing districts it lists, and M1-2 is not one of them. An existing home may be repaired, but structural alterations are barred except in listed cases.6 It may be extended only on the ground floor, and only if it meets four conditions.7 If it is demolished, or damaged to half its floor area or more, it may be rebuilt only for a use the district allows, which a home is not.8 If it stands empty for two continuous years, the same rule applies.9

In 2019 the City committed to study these districts, with a focus on legalizing their homes, and to report to Community Board 1 by 2021; its 2025 update records the results as shared with the Community Board 1 chair in December 2021. No published study found; no rezoning in the land use records held, to 12 August 2026.

Five changes, and the lots they moved

Five changes have rezoned part of this street. Two are map amendments of 1964, effective 9 April and 28 May, which between them changed three lots; no record this project holds names who filed either. The other three are applications between 2019 and 2025, and they moved six lots. One lot was changed twice: 320 Concord Avenue, in 1964 and again in 2019.

320 Concord Avenue, effective 17 October 2019. Rezoned by C 190336 ZMX, from M1-3 to M1-4/R7X — the land use application for the New York City Borough-Based Jail System. The Commission’s report states no lot count, defining the area only by its boundaries; the companion site-selection report describes the map change as rezoning the western portion of Block 2574, which is part of one tax lot.10

431 Concord Avenue, effective 27 May 2021. Rezoned by 200274zmx, from M1-2 to R7D. At adoption this was three lots, each of them only in part — Block 2578, parts of Lots 15, 16 and 18 — of which one was not under the applicant’s control. The applicant of record was Concord Realty LLC.

432, 434 and 438 Concord Avenue and 435 Wales Avenue, with parts of 428 Concord Avenue and 429 Wales Avenue, effective 13 February 2025. Rezoned by 240104zmx. At adoption this was six lots — four whole and two in part — running the full width of the block from Concord Avenue to Wales Avenue, of which four front Concord. The zoning tax lot database still carries 428 Concord split between M1-4/R7D and M1-2.

The count depends on when you count, and the record shows why. Six is the number of tax lots on this corridor as they stand today. At adoption the three actions covered, respectively, part of one lot, three lots in part, and six lots of which four front this street. Lots merge, divide and move in and out of a project area. Where a number appears on the map above or in its key, it is today’s lots, and the key says so.

Each of the three was brought by an applicant with a project — a jail, and two housing developments. Each entered through the Uniform Land Use Review Procedure, was heard, and was adopted. Whatever else can be said about them, they are the parts of this street’s history that left a public file.

The demolition of 327 Concord Avenue

The lot’s own record — what stood there, what removed it, and what the lot is now — is DURATION, case one.

Inside the eighteen, one lot has no building on it. 327 Concord Avenue was demolished in 2023 by the City: the Department of Buildings declared an emergency and the Department of Housing Preservation and Development carried out the demolition, outside any land use application.

The sequence is dated, and it is short. On 23 March 2023 the rear masonry wall partially collapsed at the second and third floors. The Department of Buildings served a full vacate order the same day.1112 Six days later, on 29 March, DOB issued Emergency Declaration 17526, whose remedy reads “fully demolish the building, grade and fence site.” Housing Preservation and Development opened a work order on 4 April and awarded it on 22 May. The demolition job was filed on 27 June, approved on 3 July, and permitted on 21 August. It was signed off, with a Letter of Completion, on 27 November 2023.13

What the declaration does is remove a step. Under the Administrative Code the Buildings commissioner, on finding a structure in imminent danger, may direct HPD or another agency to perform the demolition. An unsafe-building designation would ordinarily require a court precept before HPD could demolish; a declared emergency removes that requirement. The City’s expenses then become a debt recoverable from the owner and a lien on the land, ranking ahead of every other lien except taxes and assessments.14

The City’s property roll brackets the demolition: it lists a three-story building on 5 January 2023 and no building on 5 January 2024.1516

The charge. DOB’s estimated job cost and HPD’s award on that work order were both $522,104. HPD’s total charge for the order was $593,440.73, adding an administrative fee and sales tax. Its recorded total across five orders on the building was larger still, and this project does not publish that total as a figure. The charge was transferred to the Department of Finance on 1 April 2024.17

And the declaration is still active. Emergency Declaration 17526 remains an active violation with no disposition recorded as of 13 September 2026. Environmental Control Board violations continued to issue against the property after the building was gone — one in October 2023 for failing to file an engineer’s report, and two in March 2026 for failing to certify corrections. The lot is not City property.18

This is the only land-use instrument that ever reached these eighteen lots — and it is not a zoning instrument at all. None of them was rezoned and no application was ever brought for one. The single land-use act that touched it was issued by one agency, executed by another, required no land use review of any kind, and converted into a lien on the ground it cleared.

On the map, 327 Concord Avenue is the empty lot in the terrace, labeled but not drawn.

An error in the City’s zoning amendment dataset

The City publishes a dataset of zoning map amendments, NYZMA. For one amendment in this area — 870651zmx, effective 19 August 1987 — the polygon does not match the boundary the resolution describes.

The resolution changed M1-2 to R6 on property “bounded by East 141st Street, Jackson Avenue, East 142nd Street and a line midway between Powers Avenue and Jackson Avenue” — the block west of Jackson Avenue. The 8-19-87 edition of Zoning Map 6c carries that change, and no later edition reverses it.19

Seventy-six percent of the lot area inside the dataset’s polygon lies on the other side of Jackson Avenue, on a block the resolution does not mention — including part of every lot in the row.

This project’s own scripts tagged three of those lots as affected by the 1987 amendment, because a parcel is tagged when its center point falls inside the polygon, and three lots have just over half their area inside it. They were never in that amendment. The error is recorded because it is the kind a reader cannot see: a spatial join against a published dataset, producing a result the underlying document contradicts. The threshold that separated the three tagged lots from the next untagged one was four-tenths of one percent.20

What the records show

Thirty-five lots mapped M1-1 in 1961. Twenty-seven unchanged since M1-2 replaced it, at a date the record does not hold; one of them, 327, was demolished. Three changed in 1964, under two amendments read from the sheet itself, by applicants no record names. Six changed between 2019 and 2025 — five out of M1-2 and one out of M1-3 — each through an application brought by someone with a project, each heard and adopted on a date the record holds precisely. One lot is in both counts: 320 Concord Avenue, changed in 1964 and again in 2019.

And eighteen lots that the zoning record has nothing to say about, which housing enforcement has been working the whole time — twenty-five cases. One of those eighteen was cleared by the City under an instrument whose function is to remove a step, and the cost of clearing it became a lien on the ground.

This is what the street looks like from the record. What that designation does to a single lot inside it — what it permits, what it forecloses, and what a property owner can and cannot do under it — is DURATION.

See THE GAP.