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Ad #7909541
MLS #11681141
Listing photo

Now delivering in as little as 9 months, ARCH&Co is redefining

1215 MIDDLE LINE HWY, Sag Harbor, New York, 11963
$3,899,999
5Beds
5Baths
5,000Sqft
0.430Acres

About this property

Now delivering in as little as 9 months, ARCH&Co is redefining the Hamptons' building experience. We believe your home should reflect your unique vision. Only this extraordinary pre-completion opportunity allows you to collaborate on a residence that is customized to your exact specifications. This 5,000 sq ft estate on just shy of a half-acre lot is priced at $3.9M, including the finished residence - not just the land. The home features 5 bedrooms, 4.5 bathrooms (option to expand), and a heated gunite 16 x 36 pool, all standard. ARCH&Co provides an exclusive array of over 50 options, to personalize the build with options such as additional bedrooms, bathrooms, gym, home theater, sauna, steam room, outdoor kitchens, fireplaces, and more. Inside, you are invited to work alongside the renowned Fiorello Design to select premium tiles, flooring, cabinetry, countertops, and paint colors, - all included within the standard pricing. This is a rare opportunity to create a fully customized home, without the complexity of a traditional custom build, that only ARCH&Co can offer.

Property Features

5 Beds
5 Baths
5,000 Sqft
Built in 2026
0.430 Acres
Suffolk County

Additional Photos

Additional listing photo 1
Additional listing photo 2
Additional listing photo 3
Additional listing photo 4

Contact Information

Josh Seidner

Compass

212-913-9058

Location

Map
Listing Agent: Josh Seidner 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.
BeachHouse.com
Printed Jul 25, 2026

Photo Gallery

Now delivering in as little as 9 months, ARCH&Co is redefining - photo 1
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 2
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 3
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 4
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 5
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 6
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 7
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 8
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 9
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 10
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 11
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 12
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 13
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 14
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 15
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 16

$3,899,999

5
Beds
5
Baths
5,000
Sqft

1215 MIDDLE LINE HWY, Sag Harbor, New York, 11963

By contacting this agent you agree to these Terms and Conditions.
Home New York Sag Harbor
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 1
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 2
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 3
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 4
Now delivering in as little as 9 months, ARCH&Co is redefining - photo 5
MLS# 11681141
Home Active Under Contract

Now delivering in as little as 9 months, ARCH&Co is redefining

$3,899,999

1215 MIDDLE LINE HWY, Sag Harbor, New York, 11963

5
Beds
5
Baths
5,000
Sqft
0.430
Acres
$3,899,999
1215 MIDDLE LINE HWY, Sag Harbor, New York, 11963
5 Beds
5 Baths
5,000 Sqft
0.430 Acres
Now delivering in as little as 9 months, ARCH&Co is redefining the Hamptons' building experience. We believe your home should reflect your unique vision. Only this extraordinary pre-completion opportunity allows you to collaborate on a residence that is customized to your exact specifications. This 5,000 sq ft estate on just shy of a half-acre lot is priced at $3.9M, including the finished residence - not just the land. The home features 5 bedrooms, 4.5 bathrooms (option to expand), and a heated gunite 16 x 36 pool, all standard. ARCH&Co provides an exclusive array of over 50 options, to personalize the build with options such as additional bedrooms, bathrooms, gym, home theater, sauna, steam room, outdoor kitchens, fireplaces, and more. Inside, you are invited to work alongside the renowned Fiorello Design to select premium tiles, flooring, cabinetry, countertops, and paint colors, - all included within the standard pricing. This is a rare opportunity to create a fully customized home, without the complexity of a traditional custom build, that only ARCH&Co can offer.
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Property Details

HOME DETAILS

5 Beds
5 Baths
5,000 Sqft
Built in 2026
0.430 Acres

FINANCIAL & COMMUNITY

Suffolk County

Location

Map
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Ad Statistics

Ad Number
7909541
Viewed
20 times
Listing Status
Active Under Contract
Added
Jul 02, 2026
Last Refresh
Jul 24, 2026 10:50:11 PM

Listing Information

Data Source
My State MLS
Source Property ID
11681141
Listing Agent: Josh Seidner 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.

Request Information

By proceeding, you authorize Dream Home Network Inc., its service providers (including real estate professionals such as Brokers, Listing Agents, Buyers Agents, and local referral partners), its affiliates, and other real estate professionals that may not be associated with Dream Home Network, to contact you using the contact details you provided, via email, phone call, and text (SMS), including using automated dialing technology and prerecorded and artificial voice, for marketing or advertising purposes, including contacting you about your inquiry and other home-related matters. You understand that your consent to the foregoing is not a condition of any purchase. Message and data rates may apply. This consent applies even if you are on a corporate, state or national Do Not Call list. Dream Home Network Inc. may share information about your recent and future site activity with its affiliates and service providers (including real estate professionals such as Brokers, Listing Agents, Buyers Agents, and local referral partners) to help them better understand what you are looking for in a property. To opt-out at any time you can reply "STOP" or contact Dream Home Network Inc. at csv@dreamhomenetwork.com.

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By proceeding you authorize Dream Home Network Inc., its service providers (including real estate professionals such as Brokers, Listing Agents, Buyers Agents, and local referral partners), and its affiliates, to contact me using the contact details you provided, via phone call or text (SMS) using automated dialing technology for marketing or advertising purposes, including contacting me about my inquiry and other home-related matters. Not a condition for purchase. Message and data rates may apply.
This consent applies even if you are on a corporate, state or national Do Not Call list. Dream Home Network Inc. may share information about your recent and future site activity with its affiliates and service providers (including real estate professionals such as Brokers, Listing Agents, Buyers Agents, and local referral partners) to help them better understand what I am looking for in a property. To opt-out at any time you can reply "STOP" or contact Dream Home Network Inc. at  csv@dreamhomenetwork.com.
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Dream Home Network Inc.

is committed to ensuring digital accessibility and property listings for individuals with disabilities. All information provided is deemed reliable but is not guaranteed and should be independently verified. We are continuously working to improve the accessibility of our web experience for everyone, and we welcome feedback and accommodation requests. If you wish to report an issue or seek an accommodation, please let us know.

Dream Home Network Inc. Sells leads to DHN Realty Inc. who holds real estate brokerage licenses in Alabama. Listing agents will be sent notification copy of leads on their listings where Dream Home Network Inc. is provided listings via our Feed Provider as required.

© 1997 - 2026 BeachHouse.com
Part of Dream Home Network, Inc.
Last updated on 2026.07.25
Terms & Policy