Welcome to This Stunning Postmodern Masterpiece in Half Hollow Hills SD. Impeccably improved and maintained by its original owner since 2001, this exceptional 5-bedroom, single-family residence offers the perfect blend of grand design, modern luxury, and total privacy. Set on a generous lot with a sweeping driveway, the home makes a statement from the moment you arrive — and delivers on every promise once inside. A commanding two-story foyer and elegant sweeping staircase set the tone, flowing into expansive formal living and dining rooms. The heart of the home is a chef's kitchen equipped with premium Sub-Zero appliances, a breakfast bar, and a casual dining area that opens seamlessly into a warm, inviting den — all overlooking a spectacular backyard retreat complete with a large patio, a fully equipped outdoor kitchen, and a sparkling in-ground pool. A versatile first-floor bedroom suite with a private bath and separate entrance offers endless flexibility — whether as a home office, nanny suite, or in-law accommodations. A dedicated pantry, laundry room, and an oversized 3-car garage round out the main level. Upstairs, the primary suite is a true sanctuary, featuring dual walk-in closets and a spacious ensuite bath. Three additional generously sized bedrooms, a large shared bath, and a bonus space provide room for everyone and everything. The fully finished basement with high ceilings effectively doubles the home's living space — ready to become a home theater, gym, playroom, or whatever suits your lifestyle. Basement is accessible by legal outside entrance. Located in the highly coveted Half Hollow Hills School District, this one-owner gem offers the privacy, space, and luxury today's discerning buyer demands.
Single-familyProperty Type
2002Year Built
1.33 acresLot Size
$511Price/Sq.Ft.
3 garage spacesParking
Listing by Melissa DAngelo• Compass Greater NY LLC
Listing by Jean Marie Blissett• Compass Greater NY LLC
Est. $2,926 per month, based on comparable rentals
Sale and tax history for 129 Round Swamp Rd
Sale History
Tax History
Date
Event
Price
OneKey® MLS as Distributed by MLS Grid #979531
Aug 21, 2026
Sold
$2,045,000
$511/sq ft
Jun 17, 2026
Pending
—
May 4, 2026
Price Changed
$2,250,000
$563/sq ft
Apr 1, 2026
Listed
$2,500,000
$625/sq ft
Public Records
Jun 21, 2000
Sold
$200,000
$50/sq ft
Year
Property tax
Land + Additions
Assessment*
2026
$30,948
$550 + $7,250
$7,800
2025
$30,948 (+3.6%)
$550 + $7,250
$7,800
2024
$29,886 (+6.8%)
$550 + $7,250
$7,800
2023
$27,971 (+2.9%)
$550 + $7,250
$7,800
2022
$27,191
$550 + $7,250
$7,800
2021
$27,191 (+1.9%)
$550 + $7,250
$7,800
2020
$26,673 (−49.5%)
$550 + $7,250
$7,800
2019
$52,777 (+104.6%)
$550 + $7,250
$7,800
2018
$25,791 (+3.0%)
$550 + $7,250
$7,800
2017
$25,028 (+1.9%)
$550 + $7,250
$7,800
2016
$24,550 (+3.3%)
$550 + $7,250
$7,800
2015
$23,759 (−14.8%)
$550 + $7,250
$7,800
2014
$27,872 (+3.2%)
$550 + $9,000
$9,550
2013
$27,007 (+4.0%)
$550 + $9,000
$9,550
2012
$25,959 (+5.7%)
$550 + $9,000
$9,550
2011
$24,564 (+4.6%)
$550 + $9,000
$9,550
2010
$23,491 (+2.1%)
$550 + $9,000
$9,550
2009
$23,011
$550 + $9,000
$9,550
Public record
Beds
—
Baths
—
Stories
—
Lot width
—
Lot depth
—
Lot size
1.33 Acres
Year renovated
—
Sq. Ft.
—
Year built
—
Style
Single Family Residential
County
Suffolk County
APN
0400227000100036000
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Aug 31, 2026.
Property details
Parking
Parking Information
Carport YN: No
Parking Total: 20
Parking Features: Driveway, Garage, Off Street, Private
Garage Information
Garage Spaces: 3
Has Garage
Interior
Fireplace Information
Has Fireplace
Fireplaces Total: 1
Fireplace Features: Wood Burning
Heating & Cooling
Cooling: Central Air
Heating: Forced Air, Natural Gas
Interior Features
Interior Features: First Floor Bedroom,First Floor Full Bath,Cathedral Ceiling(s),Ceiling Fan(s),Central Vacuum,Chandelier,Chefs Kitchen,Crown Molding,Double Vanity,Eat-in Kitchen,ENERGY STAR Qualified Door(s),Entrance Foyer,Formal Dining,Granite Counters,High Ceilings,High Speed Internet,His and Hers Closets,In-Law Floorplan,Kitchen Island,Open Floorplan,Open Kitchen,Pantry,Primary Bathroom,Recessed Lighting,Smart Thermostat,Soaking Tub,Sound System,Storage,Tray Ceiling(s),Walk-In Closet(s),Washer/Dryer Hookup,Wired for Sound
Window Features: Double Pane Windows
Laundry Features: Electric Dryer Hookup, Laundry Room
Appliances: Cooktop, Dishwasher, Dryer, ENERGY STAR Qualified Appliances, Gas Oven, Microwave, Oven, Refrigerator, Stainless Steel Appliance(s), Washer, Water Purifier Owned
Lot Features: Back Yard, Cleared, Front Yard, Garden, Landscaped, Private
Property Information
Living Area Source: Other
Living Area (Sq. Ft.): 4000.00
Building Area Total (Sq. Ft.): 6000.00
Building Area Source: Other
Property Sub Type: Single Family Residence
Financial
Tax Information
Tax Year: 2025
Tax Source: Municipality
Tax Annual Amount: $30,947.54
Financial Information
Buyer Financing: ARM
Utilities
Utility Information
Sewer: Septic Tank
Utilities: Cable Connected, Electricity Available, Natural Gas Connected, Sewer Connected, Water Available, Water Connected
Location
School Information
Elementary School: Sunquam Elementary School
Elementary School District: Half Hollow Hills
Middle Or Junior School: West Hollow Middle School
Middle Or Junior School District: Half Hollow Hills
High School: Half Hollow Hills High School East
High School District: Half Hollow Hills
Location Information
County Or Parish: Suffolk County
Public facts
Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: 1.33 acres
Style: Single Family Residential
Year Built: —
Year Renovated: —
County: Suffolk County
APN: 0400227000100036000
Home facts updated by county records on Aug 31, 2026
Around this home
Schools
Sunquam Elementary School
Public K-5 • Assigned • 1.8mi
8/10
West Hollow Middle School
Public 6-8 • Assigned • 3.3mi
7/10
Half Hollow Hills High School East
Public 9-12 • Assigned • 4.6mi
9/10
Provided by GreatSchools
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
5/10 Heat Factor
7 days above 97° expected this year, 15 days in 30 years
6/10 Wind Factor
70% chance of strong winds in next 30 years
4/10 Air Factor
4 unhealthy days expected this year, 5 days in 30 years
Provided by First Street
Historical weather
Huntington, NY • 11743
Average low and high temperatures (°F)
35
23
38
24
52
35
61
44
69
53
80
63
85
70
80
63
74
60
66
50
54
40
41
28
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
88/ 100
Very good sunlight
Sunscore
This home ranks in the top 25% for direct sun exposure in the zip code. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
9.3 hrs
5.7 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$1.99M – $2.41M
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