J-51 Exemption and Abatement (Historical)
This dataset provides J-51 benefit data earlier than tax year 2019 and is not updated. To view J-51 benefit data for newer tax years, visit the Property Exemption Detail dataset and the Property Abatement Detail dataset. J-51 is a property tax exemption and abatement for renovating a residential apartment building. The benefit varies depending on the building's location and the type of improvements. The NYC Department of Housing Preservation and Development (HPD) determines eligibility for this program. The NYC Department of Finance (DOF) administers the benefit.
Open in the graph · Relate this dataset · What these columns mean
Freshness
The publisher's promise
How the agency that publishes this data says it keeps the data current.
Dormant
- Says it updates
- Historical data
- Actually updates about every
- —
- Publisher last updated the data
- Mar 14, 2019
Our mirror
Whether our copy of this data is current with the source.
In sync
- We last synced
- Mar 14, 2019, 12:31 PM
- Rows in our copy
- 4,232,279
- Rows at the source
- 4,232,279
- Our copy trails the source by
- under a minute
Columns
Each source column, with the name and type we use to store it.
1 of 15 columns carry a concept; 15 carry a description from the publisher. Read the concept column before you join. A column with no concept carries no claim from us, and a name that looks like a key is not one.
| Source field | Display name | What the publisher says it is | Concept | Source type | Stored as | Stored type | Row identifier | Unit |
|---|---|---|---|---|---|---|---|---|
qtr | QTR | Quarter; Blank = first quarter. | Not bound | Text | qtr | text | — | |
amt_remain | AMT_REMAIN | Amount remaining | Not bound | Number | amt_remain | numeric | — | |
b | Borough Code | Borough where property is located. 1= Manhattan, 2 = Bronx, 3 = Brooklyn, 4 = Queens, 5 = Staten Island | boroughinvestigated | Number | b | numeric | — | |
tax_year | TAX_YEAR | Tax year | Not bound | Number | tax_year | numeric | — | |
abatement | ABATEMENT | Abatement amount | Not bound | Number | abatement | numeric | — | |
total_tax | TOTAL_TAX | Total tax amount | Not bound | Number | total_tax | numeric | — | |
abate_grant | ABATE_GRANT | Amount of abatement granted | Not bound |
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This file was produced on Sep 2, 2026, 10:01 PM.
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Source and attribution
Where this data comes from, which version we hold, and what we changed.
- Source
- https://data.cityofnewyork.us/d/y7az-s7wc
- Version
- Content hash:
bc342eac263121d1010fa6d97791eb34f722bbf7e365a72d02e8b2eeb880a0bd - What we changed
- We did not change the data. We stored it as published.
- Publisher
- codenownyc
- We retrieved it
- Mar 14, 2019, 12:31 PM
Update history
| Started | Kind | Result | Rows written | Produced by |
|---|---|---|---|---|
| Sep 1, 2026, 10:17 AM | full_replace | success | 4,232,279 | codenow-nycmesh-container-oci.jfrog.io/codenow/citytap-pull:0.1.73 |
| Sep 1, 2026, 8:00 AM | full_replace | failed | — | codenow-nycmesh-container-oci.jfrog.io/codenow/citytap-pull:0.1.73 |
| Sep 1, 2026, 5:50 AM | full_replace | aborted | — | codenow-nycmesh-container-oci.jfrog.io/codenow/citytap-pull:0.1.73 |
| Sep 1, 2026, 4:07 AM | full_replace | failed | — | codenow-nycmesh-container-oci.jfrog.io/codenow/citytap-pull:0.1.73 |