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MLS ID KEY1047907Last updated Sep 18, 2026

Single Family

21 Weir Lane

Pending · Oyster Bay · Nassau County, NY 11560

Bedrooms
4 Beds
Bathrooms
4 Baths
Year built
1936
Est. monthly taxes
$1,656.23
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About this home

Step into timeless elegance with this move-in ready Locust Valley gem. Built in 1936, this residence beautifully preserves its classic character while offering every modern comfort for today’s lifestyle. Inside, gleaming hardwood floors lead you through a thoughtful layout, centered by a warm living area featuring a wood-burning fireplace and a formal dining room designed for effortless entertaining. The transition to outdoor living is seamless. The large brick patio, anchored by a built-in gas fire-pit and grill, serves as a natural extension of the home—perfect for hosting gatherings or enjoying quiet evenings al fresco. The upper level offers four spacious bedrooms and three full bathrooms. A unique feature of this home is the private back staircase, which provides a separate entrance for a guest suite or staff quarters, ensuring privacy for everyone. Situated on a professionally landscaped half-acre, the grounds are a true retreat, adorned with specimen trees and lush plantings that offer a sense of seclusion. With ample room for a pool, the backyard is a blank canvas. Located just moments from the village’s renowned restaurants, boutique shopping, transportation, country clubs, and local beaches, this property offers the very best of Locust Valley in town living.

Listing snapshot

Days on site
49 days
Listed on MLS
Sep 8, 2026
Full baths
3
Half baths
1
Annual property tax (MLS)
$19,874.77
Tax year
2026
Area source (MLS)
Public Records
Listing brokerage
Compass Greater NY LLC
MLS ID
KEY1047907
Last updated
Sep 18, 2026

General features

Property type
Single Family
Property subtype
Single Family Residence
Year built
1936
Garage
Yes
Garage spaces
2
Total parking
3
Parking
Driveway
Water source
Public
Sewer
Cesspool
Utilities
Natural Gas Connected

Interior features

Basement
Full
Heating
Forced Air
Cooling
Central Air
Interior
Built-in Features, Crown Molding, Eat-in Kitchen, Entrance Foyer, Formal Dining, Original Details, Primary Bathroom, Quartz/Quartzite Counters, Recessed Lighting, Storage, Washer/Dryer Hookup
Appliances
Dishwasher, Dryer, Gas Cooktop, Gas Oven, Oven, Range, Refrigerator, Stainless Steel Appliance(s), Washer, Gas Water Heater
Fireplace
Yes
Fireplaces
1

Exterior features

Architectural style
Colonial
Construction materials
Frame
Exterior
Fire Pit, Mailbox, Rain Gutters
Private pool
No

Schools (MLS)

Elementary school
Ann Macarthur Primary School
Elementary school district
Locust Valley
Middle school
Locust Valley Middle School
Middle school district
Locust Valley
High school
Locust Valley High School
High school district
Locust Valley

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

Recent activity

  1. Listing updated from MLS
  2. MLS status changed
  3. First seen on this site

Location

Oyster Bay · Nassau County, NY 11560Show interactive map
21 Weir Lane

Oyster Bay · Nassau County, NY 11560

Google Maps directions

Estimate monthly payment

Loan detailsFixed-rate, fully amortizing loan. Edit the assumptions below; no market rate is supplied.
Property expenses (USD)
MLS amounts are prefilled when available and can be edited. Confirm what fees include. Unknown fee frequencies cannot be converted automatically.Property expenses: MLS values where available; missing values stay blank.

Estimated monthly principal & interest—

Monthly property taxNot provided

Monthly association / maintenance feesNot provided

Estimated monthly total of entered costs—

Excludes insurance, mortgage insurance, special assessments and lender fees. MLS taxes may reflect abatements or exemptions and can change.

Listing data is supplied by the MLS and may change without notice.