Ad #7591299
MLS #11694294
Set on 2.1 acres abutting the protected Long Pond Greenbelt
78 Round Pond Ln, Sag Harbor, New York, 11963
$4,495,000
4Beds
5Baths
4,195Sqft
2.110Acres
About this property
Set on 2.1 acres abutting the protected Long Pond Greenbelt, this 4,195-square-foot modern estate offers a rare blend of architectural sophistication and natural serenity, just minutes from Sag Harbor Village. With 4 bedrooms and 4.5 bathrooms, the home is anchored by a dramatic double-height great room, where walls of floor-to-ceiling glass frame the surrounding landscape and a Belgian wood-burning fireplace serves as both a striking focal point and an efficient whole-home heat source. Designed for seamless living and entertaining, the main level flows effortlessly from the great room into a professional-grade kitchen featuring an oversized waterfall island, and into a dedicated dining area that opens directly to the outdoors. Thoughtful amenities enhance the experience, including an en-suite guest bedroom, private home theater, and a fully equipped gym. Upstairs, the layout is intentionally divided into two wings for optimal privacy. The primary suite occupies its own side, complete with a walk-in closet, spa-inspired bath, and private terrace overlooking the grounds. Opposite, two additional en-suite bedrooms provide comfortable accommodations for family or guests. The outdoor setting evokes a private resort, centered around a heated gunite pool with integrated spa and waterfall. A well-appointed pool house includes a kitchenette, infrared sauna, and outdoor shower, while the landscaped grounds feature an irrigated garden, fire pit, and expansive bluestone patios. A detached garage completes the property. Beyond its design and amenities, the home is built for lasting performance, with a four-zone HVAC system with ionic air scrubbers, a triple-stage water filtration system, and a full-property generator. A truly turnkey offering in one of Sag Harbor's most naturally preserved settings.
Property Features
4 Beds
5 Baths
4,195 Sqft
Built in 2016
2.110 Acres
Has Fireplace
Suffolk County
Additional Photos
Contact Information
Matthew S Breitenbach
Compass
212-913-9058
Location
Listing Agent: Matthew S Breitenbach 212-913-9058
Broker: Compass 212-913-9058 Listing Site
Copyright © 2026 My State MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Broker: Compass 212-913-9058 Listing Site
Copyright © 2026 My State MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
BeachHouse.com
Printed Jul 24, 2026
Photo Gallery
$4,495,000
4
Beds
5
Baths
4,195
Sqft
78 Round Pond Ln, Sag Harbor, New York, 11963
By contacting this agent you agree to these Terms and Conditions.
MLS# 11694294
Set on 2.1 acres abutting the protected Long Pond Greenbelt
$4,495,000
78 Round Pond Ln, Sag Harbor, New York, 11963
4
Beds
5
Baths
4,195
Sqft
2.110
Acres
$4,495,000
78 Round Pond Ln, Sag Harbor, New York, 11963
4 Beds
5 Baths
4,195 Sqft
2.110 Acres
Set on 2.1 acres abutting the protected Long Pond Greenbelt, this 4,195-square-foot modern estate offers a rare blend of architectural sophistication and natural serenity, just minutes from Sag Harbor Village. With 4 bedrooms and 4.5 bathrooms, the home is anchored by a dramatic double-height great room, where walls of floor-to-ceiling glass frame the surrounding landscape and a Belgian wood-burning fireplace serves as both a striking focal point and an efficient whole-home heat source. Designed for seamless living and entertaining, the main level flows effortlessly from the great room into a professional-grade kitchen featuring an oversized waterfall island, and into a dedicated dining area that opens directly to the outdoors. Thoughtful amenities enhance the experience, including an en-suite guest bedroom, private home theater, and a fully equipped gym. Upstairs, the layout is intentionally divided into two wings for optimal privacy. The primary suite occupies its own side, complete with a walk-in closet, spa-inspired bath, and private terrace overlooking the grounds. Opposite, two additional en-suite bedrooms provide comfortable accommodations for family or guests. The outdoor setting evokes a private resort, centered around a heated gunite pool with integrated spa and waterfall. A well-appointed pool house includes a kitchenette, infrared sauna, and outdoor shower, while the landscaped grounds feature an irrigated garden, fire pit, and expansive bluestone patios. A detached garage completes the property. Beyond its design and amenities, the home is built for lasting performance, with a four-zone HVAC system with ionic air scrubbers, a triple-stage water filtration system, and a full-property generator. A truly turnkey offering in one of Sag Harbor's most naturally preserved settings.
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Property Details
HOME DETAILS
4 Beds
5 Baths
4,195 Sqft
Built in 2016
2.110 Acres
INTERIOR
Has Fireplace
FINANCIAL & COMMUNITY
Suffolk County
See More Details
Location
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Ad Statistics
Ad Number
7591299
Viewed
41 times
Listing Status
Active Under Contract
Added
Apr 17, 2026
Last Refresh
Jul 24, 2026 04:01:17 PM
Listing Information
Data Source
My State MLS
Source Property ID
11694294
Listing Agent: Matthew S Breitenbach 212-913-9058
Broker: Compass 212-913-9058 Listing Site
Copyright © 2026 My State MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Broker: Compass 212-913-9058 Listing Site
Copyright © 2026 My State MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
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