For sale

$4,000,000

645 Dune Rd, Westhampton Beach, NY 11978

4beds

--sqft

Single Family Residence

Built in ----

0.4 Acres Lot

$4,039,100 Zestimate^®

$--/sqft

$-- HOA

What's special

Wraparound deckPristine white-sand beachesBreathtaking easterly sunrisesOceanfront livingExceptional outdoor living spacesIncredible bay vistasPanoramic ocean views

Experience the essence of Hamptons Oceanfront living in this rare and quintessential summer getaway, set on a shy half acre with 4 bedrooms and 3 baths. This stunning Oceanfront retreat captures breathtaking easterly sunrises, panoramic Ocean views, and incredible Bay vistas across pristine white-sand beaches. Enjoy exceptional outdoor living spaces with a wraparound deck, nestled perfectly and perched high above the dunes, offering commanding views of both the Ocean and Bay. Come experience the best of Hamptons coastal living and the unlimited potential this Oceanfront presents, whether you choose to expand, enhance, or reimagine it into your ultimate Oceanfront summer compound and getaway. This rare offering is also available for rent this off-season and for Summer 2026, giving you the chance to enjoy the Hamptons' Oceanfront lifestyle before making it your own.

149 days

748

18

Tour with a local agent

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 4
Bathrooms: 3
Full bathrooms: 3

Rooms

Room types: Family Room, Laundry, Office

Features

Basement: No
Has fireplace: Yes

Interior area

Total structure area: 0

Property

Parking

Parking features: GarageAttached
Has attached garage: Yes

Features

Stories: 2
Pool features: Room for a Pool

Lot

Size: 0.4 Acres

Details

Parcel number: 0900391000200025001

Construction

Type & style

Home type: SingleFamily
Property subtype: Single Family Residence

Condition

New construction: No

Community & HOA

Location

Region: Westhampton Beach

Financial & listing details

Tax assessed value: $1,799,000
Date on market: 11/3/2025
Lease term: Contact For Details

Estimated market value

$4,039,100

$3.84M - $4.24M

$7,296/mo

Price history

Date	Event	Price
11/3/2025	Listed for sale	$4,000,000+110.5%
Source: OneKey® MLS as distributed by MLS GRID #930904 Report a problem
2/26/2020	Sold	$1,900,000
Source: Public Record Report a problem
12/16/2019	Sold	$1,900,000-13.6%
Source: OneKey® MLS as distributed by MLS GRID #L3156409 Report a problem
9/13/2019	Pending sale	$2,200,000
Source: Douglas Elliman Real Estate #346922 Report a problem
8/15/2019	Listed for sale	$2,200,000
Source: Douglas Elliman Real Estate #3156409 Report a problem
8/15/2019	Listing removed	$30,000
Source: Sag Harbor #73491 Report a problem
8/1/2019	Listed for rent	$30,000+50%
Source: Sag Harbor #73491 Report a problem
4/14/2019	Listing removed	$20,000
Source: Westhampton Beach Report a problem
4/6/2019	Listed for rent	$20,000
Source: Westhampton Beach Report a problem

Public tax history

Year	Property taxes	Tax assessment
2024	--	$1,799,000
2023	--	$1,799,000
2022	--	$1,799,000
2021	--	$1,799,000
2020	--	$1,799,000
2019	--	$1,799,000 +2.6%
2018	--	$1,753,300 +11.1%
2017	$12,561	$1,578,000
2016	--	$1,578,000
2015	--	$1,578,000
2014	--	$1,578,000
2013	--	$1,578,000
2012	--	$1,578,000
2011	--	$1,578,000 +355.8%
2007	$2,185 -38.5%	$346,200 -27.1%
2005	$3,551 -48.5%	$475,000 +2765.6%
2004	$6,891 +3.3%	$16,576
2003	$6,672 +7.1%	$16,576
2002	$6,228	$16,576

Find assessor info on the county website

Monthly payment

Estimated monthly payment

All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.

HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.

Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.

See how much you could borrow to make a competitive offer.

Get pre-qualified