$3,999,999

10 Round Pond Ln Sag Harbor, NY 11963

Estimated payment $26,091/month

Total Views 1,068
5 Beds
5 Baths
5,000 Sq Ft
$800 Price per Sq Ft

Highlights

  • In Ground Pool
  • 1 Fireplace
  • Walk-In Closet
  • Open Floorplan
  • Attached Garage
  • Patio

About This Home

At ARCH&Co, we believe your home should be customized to your lifestyle. Only an extraordinary pre-completion opportunity can do this. You don't just get a house-you get the chance to collaborate on a truly bespoke living experience. From architectural style to interior finishes, ARCH&Co offers an exclusive array of customizations, allowing you to shape every detail to fit your vision.This property offers an unparalleled blend of luxury with personalization and can be move-in ready in as little as 9 months. Priced at $3.99 million-yes, that's for the finished house, not just the land-this stunning 5,000-square-foot estate (7,000 including the lower level) features 5 bedrooms, 4.5 bathrooms, an open kitchen, and a 20x40 heated gunite pool, all standard. ARCH&Co provides over 50 customization options to elevate your lifestyle starting with the architectural style. Enhance the first floor with a den, add a cozy fireplace to the family room, or a cabana bathroom for convenience. Consider a washer/dryer in the mudroom or indulge in the luxury of a wine cellar off the living room. On the second floor, elevate your primary suite with a sitting room, deck, or fireplace, and treat yourself to a coffee bar. Add a third-floor observation deck for stunning views. Transform the lower into an entertainment hub with an additional bedroom, bathroom, home theater, and gym. With ARCH&Co, you are never working alone; collaborate with renowned interior designer Fiorello Designs to bring your vision to life. Personalize your selections for tile, flooring, paint colors, cabinets, and countertops-all included within the standard price-ensuring your home reflects your unique style and taste. This is a rare opportunity to create a customized home. Contact us today to learn more about this exceptional offering. (Seller is the listing agent.)

Listing Agent

Breitenbach Advisory Team

Compass Listed on: 07/09/2025

Compass

Co-Listing Agent

Josh Seidner

Compass

Home Details

Home Type

  • Single Family

Year Built

  • Built in 2025

Parking

  • Attached Garage

Interior Spaces

  • 5,000 Sq Ft Home
  • Open Floorplan
  • 1 Fireplace
  • Entrance Foyer
  • Living Room
  • Dining Room
  • Basement Fills Entire Space Under The House

Kitchen

  • <<OvenToken>>
  • Dishwasher

Bedrooms and Bathrooms

  • 5 Bedrooms
  • En-Suite Primary Bedroom
  • Walk-In Closet
  • 5 Full Bathrooms

Laundry

  • Dryer
  • Washer

Pool

  • In Ground Pool
  • Gunite Pool

Additional Features

  • Patio
  • 0.65 Acre Lot
  • Septic Tank

Home Details

Home Type

Single Family

Year Built

Built in 2025

Lot Details

0

Listing Details

  • ExteriorPatio: Yes
  • HamletID: 0
  • InteriorAmps: 0
  • LandFrontageInFeet: 0
  • LandRentAmount: 0
  • Lot Size Acres: 0.65
  • Number Of Stories: 0
  • PercentageOfTaxThatIsDeductable: 0
  • PoolGunite: Yes
  • PoolInground: Yes
  • PropertyCity: Sag Harbor
  • Property Class: 210
  • PropertyTownship: Southampton
  • Prop. Type: Residential
  • PropertyZipCode: 11963
  • PropertyZoneType: 0
  • Renovation Year: 0
  • Dining Room: Yes
  • En Suite Room: Yes
  • Foyer: Yes
  • Kitchen: Yes
  • Walk In Closet: Yes
  • SForSaleAndRForRental: S
  • USStateAbbreviation: NY
  • WaterSourceType: Private Well
  • Year Built: 2025
  • Special Features: NewHome
  • Property Sub Type: Detached
  • Stories: 0

Interior Features

  • ApplianceDishwasher: Yes
  • ApplianceDryer: Yes
  • ApplianceOven: Yes
  • ApplianceRefrigerator: Yes
  • ApplianceWasher: Yes
  • BasementAreaSquareFootage: 0
  • Basement Type: Full
  • Kitchen Type: Open
  • Fireplaces: 1
  • Number of Rooms: 0
  • Living Room: Yes
  • AboveArea Sq Ft: 5000

Garage/Parking

  • AttachedParking: 0
  • Garage Type: Attached
  • Numberof Garage Spaces: 0

Utilities

  • Sewer Type: Private Septic
  • Utilities: 0

Condo/Co-op/Association

  • HOA Fees: 0
  • Units in Building: 0

Schools

  • School District: Sag Harbor
  • School District: Sag Harbor

Lot Info

  • Number Of Lots: 0

Multi Family

  • Unit Number of Bedrooms: 5
  • Total Taxes: 0

Tax Info

  • Tax Year: 0

Map

Range of Values:

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Average Value
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List Price
Sold Price
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Home Values in the Area

Source: Public Records

Average Home Value in this Area





Source: Public Records

Tax History

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2024 -- $774,100 $541,800 $232,300
2023 -- $774,100 $541,800 $232,300
2022 $5,145 $774,100 $541,800 $232,300
2021 $5,145 $774,100 $541,800 $232,300
2020 $5,133 $774,100 $541,800 $232,300
2019 $5,133 $0 $0 $0
2018 -- $684,000 $487,600 $196,400
2017 $4,863 $684,000 $487,600 $196,400
2016 $5,020 $684,000 $487,600 $196,400
2015 -- $684,000 $487,600 $196,400
2014 -- $684,000 $487,600 $196,400
Source: Public Records

Property History

Date Event Price Change Sq Ft Price
07/09/2025 07/09/25 For Sale $3,999,999 -- $800 / Sq Ft
Source: NY State MLS

Mortgage History

Date Status Loan Amount Loan Type
Closed $900,000 Reverse Mortgage Home Equity Conversion Mortgage
Closed $172,000 Unknown
Source: Public Records

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Source: NY State MLS

MLS Number: 11532764

NY State MLS

APN: 0900-026-00-02-00-023-001