Millionaires’ RowPropertyNYC DOF 2027 supplemental roll

21 SOUTH WILLIAM STREET, APT 7D

Manhattan · 10004 · NEW YORK · BBL 1-00029-1230

On the supplemental roll · does not match the published surcharge criteria

Full market value
$198,832
DOF estimate · tax year 2027 · roll TC2

In this building

Same building33 units, each valued separately

AptFull market value
COMM$1,334,999
PH$837,032
6D$193,481
5D$189,313
7E$179,784
6E$176,223
4D$175,020
2A$173,244
5E$172,046
3D$170,867
4E$169,669
2D$168,476
3E$166,695
2E$164,314
5B$155,972
3A$154,782
4B$154,782
3B$152,408
5A$152,408
6B$145,256
2B$143,474
7C$138,706
7B$135,737
6C$135,144
4A$133,350
5C$130,966
4C$128,598
3C$123,831
2C$121,444
6A$119,066
7A$116,086
21 SOUTH WILLIAM STREET

Unit values are assessed individually; the building figure is their aggregate.

Classification

Tax class2
Tax class meaningClass 2 — rentals, co-ops & condos
Building classR4
Building typeCondo — residential unit, elevator building

Parcel identifiers

PARID1000291230
BBL1-00029-1230
BBL (numeric)1000291230
Borough code1 · Manhattan
Block29
Lot1230
Apartment7D
Co-op number
Condo number101541
House number21–23
StreetSOUTH WILLIAM STREET
ZIP code10004
Source rollTC2 · 2027
Supplemental rollListed

Owner of record

COSTES, MICHEL4 properties

4 properties4 on supplemental roll

Normalized nameCOSTES, MICHEL
Combined full market value$1,446,147

Other properties held by COSTES, MICHEL 3

AddressBoroughClassFull market value
70 WASHINGTON STREET, APT 12HBrooklynR4 · Condo — residential unit, elevator building$468,253
18 PINE STREET, APT 508ManhattanR4 · Condo — residential unit, elevator building$436,854
70 WASHINGTON STREET, APT 5ABrooklynR4 · Condo — residential unit, elevator building$342,208

Location

40.70496, -74.01041

About this data. Source: the New York City Department of Finance 2027 supplemental property roll — a public record listing properties that may fall within the scope of the non-primary-residence (“pied-à-terre”) surcharge — shown against the full FY27 assessment roll of every parcel in the city. Owner names and addresses are reproduced as published by DOF.

Parcels drawn in grey are on the city assessment roll but not on the supplemental roll; white parcels are on the supplemental roll. Grey is context, not a judgement — a great deal of the city (airports, parks, offices, most commercial property) was never in scope for this surcharge in the first place.

Parcels marked in red match the criteria DOF published for the surcharge — broadly, class 1 houses over $5M and condo or co-op units at $1M and above. DOF describes the roll as including but not limited to properties that may be subject, and a property used as the owner’s primary residence is generally exempt, so a red mark means may be subject, never that tax is owed.

Dollar figures are DOF full market value (FMV) estimates used for assessment purposes. They are not sale prices, appraisals, or listing prices. Appearing on this roll does not mean the tax applies to a property — eligibility depends on residency and other facts that are not in this dataset. Records may contain errors carried over from the source roll.