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100 United Nations Plaza #18C, New York, NY 10017 Property Information

Q: How many residential units does this building have?

This building has 1 residential units and 0 commercial spaces.

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Address

Primary address	100 United Nations Plaza #18C
Secondary address	861-863 1st Ave
Neighborhood	Turtle Bay

Zip code	10017
Borough	Manhattan
Block & lot	01341-1501

Sales & Tax Overview for 100 United Nations Plaza #18C, New York

View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.

Purchase date	04/04/2022
Purchase price	$915,000

Tax class	Register
Estimated property tax	$15,387

Lot & Building Information for 100 United Nations Plaza #18C, New York

Lot sq. ft.	25,179
Property type	Condo - Residential Unit in Elevator Building (R4)
Building sqft	791
Buildings on lot	1
Stories	49

Year built	1984

Zoning & Use for 100 United Nations Plaza #18C, New York

Residential units (DOF)	1

Area Overview

Walk Score

Transit Score

Bike Score

School district	2
Community district	6

Closest police station	0.25 Miles
Closest fire station	0.43 Miles

View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.

Unit Overview

Unit #	18C
Square feet	791
Condo complex	100336

Other Property Data for 100 United Nations Plaza #18C, New York

New York property reports include comprehensive occupancy, development and violation information. Create a free account to access valuable data points such as:

Floor area ratio (FAR) for 100 United Nations Plaza #18C, New York, NY 10017, including commercial and residential FAR, FAR as built and usable floor area.

Development maps such as planimetric, zoning, urban landscape, and HPD alternative enforcement program maps.

Violations for 100 United Nations Plaza #18C, New York, NY 10017, including DOB violations, ECB violations, HPD violations and 311 complaints.

Alternate Addresses

You will find all alternate addresses for the property in this section.

861-863 1st Ave, New York, NY 10017
327-345 E 48th St, New York, NY 10017
100 Unp, New York, NY 10017

About 100 United Nations Plaza #18C, New York

What is the year built & the total sq. ft. for 100 United Nations Plaza #18C, New York, NY 10017?

100 United Nations Plaza #18C, New York, NY 10017 was built in 1984 and has a total of 791 square feet.

What is the assessed value of 100 United Nations Plaza #18C, New York, NY 10017 and the property tax paid?

Assessed at $137,830, the tax amount paid for 100 United Nations Plaza #18C, New York, NY 10017 is $15,417. For the next year, the tax amount for 100 United Nations Plaza #18C, New York, NY 10017 is estimated at $15,387.

When was 100 United Nations Plaza #18C, New York, NY 10017 last sold?

100 United Nations Plaza #18C, New York, NY 10017 was last sold in 02/17/2023.

How many residential units does this building have?

This building has 1 residential unit(s).

Ownership Information for 100 United Nations Plaza #18C, New York

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Property owner name for 100 United Nations Plaza #18C, New York, NY 10017

Find out who owns 100 United Nations Plaza #18C, New York, NY 10017.
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Building contacts for 100 United Nations Plaza #18C, New York, NY 10017

Building management:	Register
Representatives (from permits):	Register
Tenants:	Register

Commercial Real Estate nearby

Real Estate Reports:

Eliza Theiss, Apr 23, 2026 $4.6M Hudson Yards Maintains Top Spot, Luxury Sales in Malba Set $2.5M Price Record for Queens

Despite prices declining, Hudson Yards remained the most expensive NYC neighborhood, but TriBeCa’s growth closed the gap to under $400,000, while Malba set a new historic price record for Queens at $2.5 million, securing the highest ranking ever for the borough at #5.

Eliza Theiss, Mar 19, 2026 Cheaper in the City? Nearly 100 Communities in Suburban NYC Surpass $1M

New Yorkers planning a move to the suburbs increasingly find their options limited, after suburban home values shot up twice as fast as NYC medians over the last decade. While larger homes and better prices were long the norm outside the five boroughs, today, many NYC buyers find their option restricted to a handful of suburban markets.

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Past Sales & Property History for 100 United Nations Plaza #18C, New York

Create a free account to view the complete sales history for 100 United Nations Plaza #18C, New York, including title documents, transfer conditions, mortgages, liens, and pre-foreclosures.

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Title Documents for 100 United Nations Plaza #18C, New York

To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.

Date	Type	Amount	Party 1	Party 2	Doc image
02/17/2023 - D 03/03/2023 - R	Deed (2023030300429001)
02/10/2023 - D 03/03/2023 - R	Power of Attorney (2023030300429002)
04/04/2022 - D 04/14/2022 - R	Power of Attorney (2022040800471003)
04/04/2022 - D 04/14/2022 - R	Deed (2022040800471002)
03/17/2022 - D 04/14/2022 - R	Power of Attorney (2022040800471001)
10/10/2017 - D 11/22/2017 - R	Maps (2017102300419002)
08/22/2017 - D 11/22/2017 - R	Amended Condo Declaration (2017102300419001)
09/18/2013 - D 10/22/2013 - R	Amended Condo Declaration (2013092200066001)
04/20/2006 - D 05/09/2006 - R	Amended Declaration (2006042100392001)
05/10/2005 - D 05/23/2005 - R	Satisfaction of Mortgage (2005051200543001)

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R: Recorded date
D: Document date

Property Taxes for 100 United Nations Plaza #18C, New York

Access detailed property tax data for 100 United Nations Plaza #18C, New York, NY 10017. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year:	2025-2026
Property tax:	$15,418
Estimated property tax:	$15,387

Tax assessor's market value:	$306,290
Assessed value:	$137,830

More about New York City Property Taxes

Assessment History for 100 United Nations Plaza #18C, New York

Here's the assessment & property tax history for 100 United Nations Plaza #18C, New York, including the evolution of the total tax rate and corresponding property tax.

Year	Market value	Assessed value	Taxable	Tax rate %	Base tax	Property tax	Year over year change
2025/26	$306,290	$137,830	$123,947	12.439%	$15,418	$15,418	-0.40%
2024/25	$288,077	$129,635	$123,842	12.5%	$15,480	$15,480	-1.08%
2023/24	$280,256	$126,115	$125,178	12.502%	$15,650	$15,650	+4.81%
2022/23	$270,485	$121,718	$121,718	12.267%	$14,931	$14,931	+0.08%
2021/22	$270,977	$121,940	$121,940	12.235%	$14,919	$14,919	-5.65%

Permits for 100 United Nations Plaza #18C, New York

The complete history of permits filed for 100 United Nations Plaza #18C, New York, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.

No recorded permits for this property.

Turtle Bay Residential Market Stats

Access a detailed real estate market overview of Turtle Bay so you can assess current trends, home values, types of properties sold and transaction volume.
View the median home sale price in Turtle Bay and compare it to other neighborhoods in Manhattan.

Median Sale Price

$898,750

-7.8% YoY

Median Price/Sqft

$1,198

-10.5% YoY

Manhattan Median Sale Price

$1,200,000

9.3% YoY

Check out recently sold homes in Manhattan and see how their prices compare.

Transportation

Distance to Subway

Closest station

3rd Ave & 53rd St at SE Corner

Station lines

E-M-6

Distance (miles)

0.313

View subway map

Bus Routes
Name	E 49 ST/1 Av
Line	M50
Distance (miles)	0.045

Schools

Nearest elementary schools

Name	Rating	Att. zoned	Type	Grade range	No of students	Distance to school (mi)
The Family School	NR	No	Private	PK, K-6	0	0.09
The Family School	NR	No	Private	PK, K-6	0	0.09
St Albans School	NR	No	Private	PK-8	118	0.12
St Albans School	NR	No	Private	PK-8	118	0.12
Saint Albans	NR	No	Private	PK, K-8	0	0.12

Nearest middle schools

Name	Rating	Att. zoned	Type	Grade range	No of students	Distance to school (mi)
St Albans School	NR	No	Private	PK-8	118	0.12
Saint Albans	NR	No	Private	PK, K-8	0	0.12
Aaron School K - 12	NR	No	Private	K-12	185	0.14
Aaron School	NR	No	Private	K-12	169	0.16
Lyceum Kennedy French American School	NR	No	Private	PK, K-12	0	0.29

Nearest high schools

Name	Rating	Att. zoned	Type	Grade range	No of students	Distance to school (mi)
Aaron School K - 12	NR	No	Private	K-12	185	0.14
Aaron School	NR	No	Private	K-12	169	0.16
The Beekman School	NR	No	Private	9-12	71	0.20
Lyceum Kennedy French American School	NR	No	Private	PK, K-12	0	0.29
Lyceum Kennedy Japanese School	NR	No	Private	PK-12	197	0.29

Neighbors for 100 United Nations Plaza #18C, New York

Here are the neighbors for 100 United Nations Plaza #18C, New York, NY 10017.

Address	Square feet	Purchase date	Purchase price
52 W 74th St, New York	10,934	06/03/1981
656 6th Ave, New York	22,000	03/25/2003
221 W 20th St, New York	8,020	02/07/1983
509 E 12th St, New York	8,458	10/13/1998
332 E 54th St, New York	7,550	03/07/1984
435 Convent Ave, New York	44,268
233 E 86th St, New York	57,745	10/19/1983
439 E 51st St, New York	73,095
980 Madison Ave, New York	118,635	06/05/2024	$560,000,000
26 E 10th St, New York	101,606	01/18/1980
240 E 26th St, New York	5,200	08/27/1984
880 5th Ave, New York	322,346
163 E 81st St, New York	59,149
1390 Lexington Ave, New York	4,180	03/25/2019
222 E 82nd St, New York	44,310	02/18/2004
520 W 43rd St, New York	319,967	08/01/2018	$193,000,000
426 W 23rd St, New York	9,463	08/01/1979
210 W 103rd St, New York	37,572	02/10/1988
315 W 119th St, New York	5,020	02/13/1987