New Construction | Water Mill South Experience exceptional Hamptons living in this new construction luxury estate in coveted Water Mill South, moments from Flying Point Beach and Southampton Village. Thoughtfully designed for sophisticated year-round living and effortless summer entertaining, this turnkey residence offers exceptional craftsmanship, refined interiors, and a resort-style outdoor oasis. Built by boutique custom builder Heartwood Corp, this 7-bedroom, 9-bathroom, 9,600-square-foot estate showcases signature craftsmanship and meticulous attention to detail. Positioned on prestigious Cobb Road behind a motorized gate and enveloped by mature, professionally designed landscaping, the property offers an exceptional sense of privacy. A soaring two-story foyer introduces the open, light-filled layout, highlighted by architectural floor-to-ceiling millwork on a double-sided gas fireplace shared with the living room. The dining area flows into a fully outfitted butler's pantry with sink, ice maker, wine refrigerator, and walk-in pantry. The chef's kitchen blends elegance and performance with custom white oak and painted cabinetry, integrated luxury appliances, and a hybrid waterfall island ideal for entertaining. The first-floor junior suite features a private patio, two walk-in closets, and a large spa-inspired bath with double vanity and privacy-glass shower enclosure that welcomes natural light. The living room, kitchen, foyer, and junior suite all overlook the landscaped grounds and pool, creating seamless indoor-outdoor living. A mudroom with garage access and a powder room complete the main level. Upstairs, the primary suite is a tranquil sanctuary offering two walk-in closets, a luxurious bath with soaking tub, separate vanities, makeup station, and privacy-glass shower and water closet, plus a dedicated office and serene views. Four additional ensuite bedrooms, a bonus room, and a custom-outfitted laundry room complete the second floor. The lower level is designed for recreation, featuring a glass-enclosed wine cellar, den with wet bar and wine cooler, flexible gym/media/game space with exterior access, a private sauna with Bluetooth controls, a full bath with steam shower, powder room, and two guest or staff bedrooms. Outdoors, resort-style amenities include a heated saltwater Gunite pool with integrated spa and sundeck, outdoor shower, stainless-steel kitchen and bar, and a dedicated outdoor powder room for poolside convenience. Expansive patios and lush landscaping set the atmosphere for effortless summer living. With Wi-Fi-enabled smart-home capabilities, custom cabinetry, tailored closet systems, central vacuum, laundry on two levels, and a radiant-heated two-car garage, 158 Cobb Road embodies timeless sophistication, abundant natural light, and modern Hamptons craftsmanship.
New construction
$9,975,000
158 Cobb Rd, Water Mill, NY 11976
7beds
--sqft
Single Family Residence
Built in 2025
-- sqft lot
$9,826,400 Zestimate®
$--/sqft
$-- HOA
What's special
Abundant natural lightBonus roomIntegrated luxury appliancesFour additional ensuite bedroomsArchitectural floor-to-ceiling millworkCentral vacuumOpen light-filled layout
- 180 days
- 421
- 37
Zillow last checked:
Listed by:
Corcoran Group,
Nicholas Amato - Real Estate Sales Person 516-514-0088
Source: Out East,MLS#: 394925
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 7
- Bathrooms: 9
- Full bathrooms: 6
- 1/2 bathrooms: 3
Rooms
- Room types: Family Room, Laundry, Office
Cooling
- Central Air
Features
- Basement: Yes
- Has fireplace: Yes
Interior area
- Total structure area: 0
Video & virtual tour
Property
Parking
- Parking features: GarageAttached
- Has attached garage: Yes
Features
- Stories: 2
- Has private pool: Yes
- Pool features: Heated
- Has spa: Yes
- Spa features: Heated
Details
- Parcel number: 0900160000300053000
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Condition
- New Construction
- New construction: Yes
- Year built: 2025
Community & HOA
Location
- Region: Water Mill
Financial & listing details
- Tax assessed value: $3,844,600
- Date on market: 4/15/2026
- Lease term: Contact For Details
Estimated market value
$9,826,400
$9.34M - $10.32M
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 9/17/2026 | Listed for sale | $9,975,000-5% |
Source: | ||
| 11/19/2025 | Listed for sale | $10,500,000+238.7% |
Source: | ||
| 2/27/2023 | Sold | $3,100,000 |
Source: Public Record Report a problem | ||
| 5/25/2022 | Sold | $3,100,000-8.7% |
Source: Agent Provided Report a problem | ||
| 2/17/2022 | Pending sale | $3,395,000-50.4% |
Source: | ||
| 9/9/2021 | Listed for sale | $6,850,000+101.8% |
Source: | ||
| 7/9/2020 | Listed for sale | $3,395,000+15.1% |
Source: Douglas Elliman Real Estate #19543 Report a problem | ||
| 6/3/2019 | Listing removed | $2,950,000 |
Source: Douglas Elliman Real Estate #3116602 Report a problem | ||
| 4/5/2019 | Listing removed | $135,000 |
Source: Douglas Elliman Real Estate Sag Harbor Office #112926 Report a problem | ||
| 3/22/2019 | Listed for rent | $135,000+77.6% |
Source: Douglas Elliman Real Estate Sag Harbor Office #112926 Report a problem | ||
| 11/7/2018 | Price change | $2,950,000-6.2% |
Source: Sotheby's International Realty #12359 Report a problem | ||
| 7/14/2018 | Listed for sale | $3,145,000-4.6% |
Source: Sotheby's International Realty #12359 Report a problem | ||
| 11/10/2017 | Listed for sale | $3,295,000+4.6% |
Source: Sotheby's International Realty #12359 Report a problem | ||
| 7/18/2017 | Listing removed | $3,150,000+38.5% |
Source: Douglas Elliman #H42633 Report a problem | ||
| 11/15/2016 | Sold | $2,275,000-7.1% |
Source: Public Record Report a problem | ||
| 8/10/2016 | Listing removed | $2,450,000 |
Source: The Corcoran Group #39101 Report a problem | ||
| 4/27/2016 | Listed for sale | $2,450,000 |
Source: The Corcoran Group #39101 Report a problem | ||
| 11/17/2015 | Listing removed | $76,000 |
Source: Sotheby's International Realty - Southampton Brokerage #0054195 Report a problem | ||
| 8/14/2015 | Listed for rent | $76,000 |
Source: Sotheby's International Realty - Southampton Brokerage #0054195 Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | -- | $3,844,600 +13.2% |
| 2024 | -- | $3,396,800 +113.5% |
| 2023 | -- | $1,590,800 |
| 2022 | -- | $1,590,800 -1.5% |
| 2021 | -- | $1,614,300 -13.7% |
| 2020 | -- | $1,870,500 |
| 2019 | -- | $1,870,500 +0.7% |
| 2018 | -- | $1,856,800 |
| 2017 | $8,539 | $1,856,800 -0.9% |
| 2016 | -- | $1,873,200 |
| 2015 | -- | $1,873,200 |
| 2014 | -- | $1,873,200 |
| 2013 | -- | $1,873,200 |
| 2012 | -- | $1,873,200 |
| 2011 | -- | $1,873,200 +5.5% |
| 2007 | $7,809 +92.8% | $1,776,200 +146.7% |
| 2005 | $4,050 -0.9% | $720,063 +6508.5% |
| 2004 | $4,088 +4.7% | $10,896 |
| 2003 | $3,904 +3.3% | $10,896 |
| 2002 | $3,780 | $10,896 |
Find assessor info on the county website





