Single Family

21 Seafield Lane

Active · Southampton · Suffolk County, NY 11978

Asking price$4,350,000Estimate monthly payment Request a Showing

Bedrooms: 7 Beds
Bathrooms: 7 Baths
Year built: 1930
Est. monthly taxes: $3,124

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About this home

Westhampton Beach Estate Section Located on one of the village's most prestigious lanes, in the heart of Westhampton Beach's estate section, this gracious home is just moments from Main Street. Built in 1930 and expanded in 1994, the seven-bedroom residence pairs beautiful original architectural details with a contemporary sense of space. A welcoming foyer opens to an expansive living room with beamed ceilings and an original marble fireplace, flowing into a distinctive octagonal sunroom and wraparound three-season porch. The main level also features a spacious dining room with bay windows and marble fireplace, connecting to the eat-in kitchen. Upstairs are seven bedrooms, most with en-suite baths, including a separate primary suite with an adjoining office and private staircase. Outside, a large deck provides plenty of room for dining and relaxing, while the gunite pool and surrounding deck create an inviting setting for summer days. A detached two-car garage, originally the property's carriage house, adds to the home's character. With its exceptional location, generous proportions, and original details, this is a rare opportunity to make a classic Westhampton Beach residence your own.

Listing snapshot

Days on site: 59 days
Listed on MLS: Aug 28, 2026
Full baths: 5
Half baths: 2
Annual property tax (MLS): $37,488
Tax year: 2026
Area source (MLS): Public Records
Listing brokerage: Corcoran
MLS ID: KEY1044207
Last updated: Oct 10, 2026

General features

Property type: Single Family
Property subtype: Single Family Residence
Year built: 1930
Garage: Yes
Garage spaces: 3
Parking: Detached, Garage
Water source: Public
Sewer: Cesspool
Utilities: Electricity Connected

Interior features

Basement: Partial
Heating: Oil
Cooling: Central Air
Interior: Beamed Ceilings, Eat-in Kitchen, Entrance Foyer, Formal Dining, In-Law Floorplan, Original Details
Appliances: Dishwasher, Dryer, Oven, Refrigerator, Washer
Fireplace: Yes

Exterior features

Architectural style: Colonial
Construction materials: Frame
Private pool: Yes

Schools (MLS)

Elementary school: Westhampton Beach Elem School
Elementary school district: Westhampton Beach
Middle school: Westhampton Middle School
Middle school district: Westhampton Beach
High school: Westhampton Beach Senior High Sch
High school district: Westhampton Beach

School information is provided by the MLS. Confirm attendance eligibility with the school district.

Recent activity

Oct 10, 2026Listing updated from MLS
Sep 28, 2026Price changed to $4,350,000
Aug 30, 2026First seen on this site
Aug 28, 2026MLS status changed

Location

Southampton · Suffolk County, NY 11978Show interactive map

21 Seafield Lane

Southampton · Suffolk County, NY 11978

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