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About This Home

This 5-bedroom, 5-bathroom single family at 1215 MIDDLE LINE HWY in Sag Harbor, NY is listed for $3,899,999 ($780 per sqft). Built in 2026, the home offers 5,000 sqft of living space on a 0.43 acres lot.

Agent Description

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 additio

nal 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.

Key Features

  • Built in 2026
  • 0.43 acre lot

Property Details

4 full, 1 half
2026

Amenities

Basement

Monthly Cost Estimate

$20,858/mo

20% down · 6.5% · 30 years

Principal$2,821
Interest$16,900
Insurance$1,137

Estimates only. Actual payments may vary.

Location

1215 MIDDLE LINE HWY

Sag Harbor, NY 11963

Features & Amenities

Interior Features

Walk-in Closet

Property Details

Parking

Garage

Questions & Answers

This 5-bedroom, 5-bathroom single family at 1215 MIDDLE LINE HWY is listed at $3,899,999 ($780/sqft). The estimated monthly payment is $16,900 based on 20% down at 6.5% interest.

Key features include: Built in 2026, 0.43 acre lot. Interior Features: Walk-in Closet.

This property is listed by Josh Seidner and can be reached at 6312599993 or josh.seidner@compass.com.

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JS

Josh Seidner

Agent at Compass

(631) 259-9993

Listed by Compass · View on Broker Site

MLS# 11681141· Source: listhub· Updated 23 days ago

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.

1215 MIDDLE LINE HWY, Sag Harbor, NY 11963

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