12 Union Avenue
Staten Island · 10303 · BBL 5012240023 · look up another building
Two residential evictions on record here, more than 10 in 10 buildings its size in 10303.
Most recent filing on this building: an eviction, September 4, 2026
12 Union Avenue is a one and two family building in Mariners Harbor, Staten Island, ZIP 10303. City records date it to 1899 and count 2 apartments. The city's property file lists the owner of record as a private individual. Its total assessed value is $44K, for the 2026 tax year.
No DHCR registration is on file for this address, which is a gap in the record rather than an answer about your apartment. The state will send you your own rent history free, and it is the only binding answer on what you should be paying.
Know the month this building changes
Most buildings here are quiet. Two filings a year is normal, so most months there's nothing to report on 12 Union Avenue and we'll say so. The point is the month we do
Taxes and assessed value for 12 Union Avenue
The city's Department of Finance assessed this lot at $44K for the 2026 tax year. That works out to $22K per residential unit. Assessed value is what the city taxes, not what the building would sell for, and the two routinely differ by a wide margin. The bill itself turns on the tax class rate and on any exemptions or abatements attached to the lot, neither of which is published here.
2 marshal evictions at 12 Union Avenue
City marshals executed 2 evictions at 12 Union Avenue in the record PulseCities holds, the most recent on Sep 4, 2026. The first fell on Nov 21, 2025, so the filings span 10 months. That is more than 10 in 10 buildings its size in 10303. Holding the marshal docket number or the court index number from one of these? Look up that case →
Marshal evictions at 12 Union Avenue
| Type | Executed | |
|---|---|---|
| Residentialdocket 081566 | Sep 4, 2026 | |
| Residentialdocket 081046 | Nov 21, 2025 |
Marshal-executed residential evictions from the NYC evictions dataset, past 12 months. Source: NYC marshal eviction records, current through October 9, 2026.
Rent stabilization at 12 Union Avenue
No DHCR rent-stabilization registration is on file for 12 Union Avenue in the years PulseCities holds. Absence is not proof: an owner who stops registering leaves the same gap as a building that never had stabilized units. Checking your own apartment starts with the free rent history from the state. That is the only binding answer, and it takes time to come back. While you wait, you can get an email when the record here moves: a deed, an eviction, a permit or a violation filed on this building. How to check rent-stabilized status →
Open code violations at 12 Union Avenue
HPD and DOB inspectors have written 2 violations against this building, of which 2 remain unresolved. That is more than 9 in 10 buildings its size in 10303. The most serious open grade here is immediately hazardous, with 1 open violation.
Classes run A (non-hazardous) to C (immediately hazardous); DOB class I carries a vacate order. Source: NYC HPD violations, current through October 10, 2026.
Violation history at 12 Union Avenue
| Violation | Issued | Class |
|---|---|---|
| Abate the nuisance consisting of evidence of rats and all underlying causes conducive to pest infestations, by…Nov Sent Out | May 26, 2026 | C |
| Remove the accumulation of refuse and/or rubbish and maintain in a clean condition the north yardNov Sent Out | May 26, 2026 | A |
The 2 most recent violations written against this building, newest first, 2 of them still open. Each row is the inspector's own wording with the statute citation removed. Source: NYC HPD violations, current through October 10, 2026.
311 complaint history at 12 Union Avenue
10 complaints in the past 12 months
NYC 311 housing and building complaints logged for this address. Source: NYC 311, current through October 10, 2026.
How 12 Union Avenue compares in 10303
PulseCities tracks 5,562 lots in 10303, of which 63 carry an executed eviction from the marshal record, which starts in April 2024, and 0 carry a deed from the shorter ACRIS window. This building is in that second group, which is 1.1% of the ZIP. 10303 scores 12.0 out of 100 for displacement pressure, 159 of 177 scored NYC ZIP codes. The full signal breakdown for Mariners Harbor →
Questions about 12 Union Avenue
Who owns 12 Union Avenue?
The city's property file lists a private individual as the owner of record for 12 Union Avenue. No deed for this lot appears in the ACRIS records PulseCities holds, so that name comes from the tax roll rather than from a recorded transfer.
Has 12 Union Avenue changed hands recently?
No deed for 12 Union Avenue appears in the ACRIS records PulseCities holds. That means no transfer has been published for this lot in the current window, not that the building has never been sold.
Have there been evictions at 12 Union Avenue?
Yes. Two marshal-executed evictions at 12 Union Avenue appear in the NYC evictions dataset, the most recent on Sep 4, 2026. The dataset covers executed evictions only, so it undercounts housing court activity: cases that settle or end in a move-out never reach a marshal.
Is 12 Union Avenue rent stabilized?
No DHCR registration for 12 Union Avenue appears in the years PulseCities holds. That is a gap in the registration record rather than an answer about any apartment, and the free rent history from NYS Homes and Community Renewal is what settles it.
What is 12 Union Avenue assessed at for property taxes?
The Department of Finance assessed the lot at $44K for the 2026 tax year. That is the figure the city taxes rather than a sale price, and the bill depends on the tax class rate and on any exemptions on the lot.
What is the displacement risk around 12 Union Avenue?
10303 (Mariners Harbor) scores 12.0 out of 100 on the PulseCities displacement index. The score reads five ZIP-level signals: LLC acquisition rate, permit intensity, 311 complaint volume, executed evictions, and serious HPD violations. It describes the area around the building, not the building itself.
Look up another building
Sourced from NYC public records: ACRIS deeds, DOB permits, the NYC evictions dataset, and 311. Records reflect what agencies have published and can lag events.