Staten Island • One Family Dwelling

21 Hardin Ave

Staten Island, NY 10310Company-ownedBBL 5003140421BIN 5008643

Updated Aug 1, 2026 · 16 sources

Year Built1920
Floors2
Units1
Building Area2,821 sqft
ZoningR2
ClassA1
Market Value$1.4M

21 HARDIN AVE is a property located at 21 HARDIN AVE, Staten Island, NY 10310. It is classified as a one family dwelling - two stories detached. The building was constructed in 1920. It has 2 floors and 1 unit. The building area is 2,821 square feet on a 14,850 sqft lot. The property is zoned R2. The assessed market value is $1.4M. Public records list the property as company-owned. There are 13 building permits on record (10 active). There are 1 violation on record (0 currently open). Data sourced from NYC Department of Buildings (DOB), Housing Preservation & Development (HPD), Department of Finance (DOF), and other government agencies.

A RegWatch Dossier

18records on file

Completed in 1920, 21 Hardin Ave rises 2 stories over Richmond. Public records put it at 1 unit and 2,821 square feet of floor area, on land zoned R2. It is carried on the public rolls at a market value of $1.4M, and assessed for tax at $82.2K. In the 29 years its record reaches back, the lot has drawn 18 separate government filings.

The documentary life of the address leans hard toward permit: 13 of its 18 records, fully 72%, fall under that one heading. Complaint (2) and lien (2) trail well behind. No violations stand open against it today.

The pace is anything but even. The early decades pass in near silence; the filings cluster heavily in recent years, peaking in 2020.

Read together — 72% permit, 29 years of accumulation, a parcel of Richmond — these scattered records compose a portrait of the address that no single page sets out to draw.

72% of every record here performs the same act: permit.

Property Details

Address21 HARDIN AVE, Staten Island, NY 10310
Building TypeOne Family Dwelling - Two Stories Detached
A1
Year Built1920
Floors2
Total Units1
Building Area2,821 sqft
Lot Size14,850 sqft
ZoningR2
ConditionAverage
5003140421
5008643
OwnershipCompany-owned

Assessment & Sales

$1.4M
$82K
$42K

Building Permits

13 on record · 10 active
General ConstructionDOB Legacy
COMPLETED
Filed Feb 6, 2023Job #520461296-01
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Dec 27, 2020Est. cost $8KJob #S00252964-I1
ElectricalDOB NOW
PERMIT ISSUED
Filed Oct 23, 2020Job #S00418598-I1-EL
Construction EquipmentDOB Legacy
ISSUED
Filed Sep 15, 2020Job #520352751-01-01
Alteration — Type 2DOB Legacy
PERMIT ISSUED - ENTIRE JOB/WORK
Filed Sep 15, 2020Est. cost $162KJob #520352751-01

+ 8 more permitsview full report

Violations

1 on record · none currently open
ECBConstruction
RESOLVE
Issued Feb 1, 1996#34123508M

WORK DONE WITHOUT A PERMIT.NOTED:A ONE STORY EXTENSION(APPROX 10'X8') WITH AN ENTRANCE DOOR,AND A SMALL DECK (APPROX 8'X10')HAS BEEN CONSTR-UCTED AT LEFT SIDE OF BLDG WITHOUT FILING PLANS AND OBTAINING APPROVAL

View this violation's full details & status history →

Get the Complete Report for 21 HARDIN AVE

Title history, detailed tax records, environmental data, zoning analysis, and more from 250+ government sources.

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Frequently Asked Questions

When was 21 HARDIN AVE, Staten Island built?

The building at 21 HARDIN AVE, Staten Island, NY 10310 was constructed in 1920. It is classified as a one family dwelling - two stories detached with 2 floors and 1 unit. The building area is 2,821 sqft.

Are there building permits at 21 HARDIN AVE, Staten Island?

Yes. 21 HARDIN AVE, Staten Island, NY 10310 has 13 building permits on record, with 10 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a General Construction (COMPLETED) filed Feb 6, 2023.

Does 21 HARDIN AVE, Staten Island have violations?

Yes. 21 HARDIN AVE, Staten Island, NY 10310 has 1 violation on record, with 0 currently open. Breakdown: 1 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 21 HARDIN AVE, Staten Island have docketed judgments?

No docketed OATH judgments were found in local records for 21 HARDIN AVE, Staten Island, NY 10310. Judgment data is sourced from NYC Office of Administrative Trials & Hearings (OATH) hearing records.

What is the property tax assessment for 21 HARDIN AVE?

21 HARDIN AVE, Staten Island, NY 10310 has an assessed market value of $1.4M and a total assessed value of $82K (land: $42K). Assessment data is from the NYC Department of Finance (DOF).

What is the zoning for 21 HARDIN AVE?

21 HARDIN AVE, Staten Island, NY 10310 is zoned R2. Zoning data is from the NYC Department of City Planning (DCP). For detailed FAR, overlays, and development rights, view the full property report on RegWatch.

Who owns 21 HARDIN AVE?

21 HARDIN AVE, Staten Island, NY 10310 is company-owned according to public records. Ownership data is from NYC Department of Finance assessment rolls. View the current owner of record and registered contacts in the full property report on RegWatch.

How do I get a full property report for 21 HARDIN AVE?

Search 21 HARDIN AVE on RegWatch to see its public record free — violations, permits, tax records, zoning, environmental data, and more from 250+ government sources, no credit card required. A Full Analysis report adds the complete title history, owner contacts, and a downloadable PDF.

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21 HARDIN AVE, Staten Island, NY 10310 — Property Records, Permits, Violations, Tax & Zoning | RegWatch