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21 Astor AvenueSaint James, NY 11780

For Sale

$1,599,000

Smart Buyer Rebate $15,990

21 Astor Ave Is Located In The Heart Of Saint James Within The Desirable Smithtown School District. This Custom Built And Architecturally Appealing 6 Bedroom, 3.5 Bath Colonial Is Only 25 Years Young & Sits On 3/4 Of An Acre. A Charming Open Front Porch Greets You Before You Enter The Large 2 Story Foyer With Grand Staircase & A Motorized Chandelier. A Bright Formal Living Room Awaits Your Guests Before You Sit Down For A Meal In The Formal Dining Room Featuring A Tray Ceiling. Lovely Hardwood Floors Throughout The Home. The Spacious Custom Kitchen With Island Has Plenty Of Room For A Dining Table And Is Open To The Family Room With Wood Burning Fireplace. There Is Also A Large Enclosed Porch For More Entertaining Space That Leads To The Rear Yard. You And Your House Guests Or In-Laws Will Appreciate The Privacy Of The 1st Floor Guest Quarters With Full Bath & Separate Entrance Complete With Mud Room And Drop Off Station Or This Could Easily Double As A Home Office. The 2nd Level Has 5 Bedrooms, A Full Bath, Laundry Room, And A Large Private En-Suite With Gas Fireplace, Walk-In Closet, And Full Bath With Tub And Separate Shower Stall. If The 4,147 Square Feet Of Living Space Wasn't Enough For You, Then Maybe The Full Finished Basement With A Home Pub & Half Bath Will Help! Wait! Theres More!! Attached 2 Car Garage, Inground Pool, & BONUS Fully Equipped Pool House With CAC & Heat! An Incredible Value For This Much House! Gas Line In Street. Projected ARV $2,300,000 Owner Motivated. Let’s Talk!

Listed by Frank Pignataro CBR

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Sailing Home Realty of L I LLC

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516-377-4760

Last updated April 27, 2026

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Source: OneKey #948811

Listing Facts

  • TypeSingle-family
  • NeighborhoodSt. James
  • Bedrooms6
  • Bathrooms4
  • Days on Prevu107
  • Taxes$27,522.4/year
  • Size4,147 sqft
  • Price per sqft$386

Amenities

  • Dishwasher
  • Private Outdoor Space
  • Washer/Dryer
  • Air Conditioning
  • Parking
  • Swimming Pool

Location

Mortgage Calculator

Listing History

03/03/2026
Price Decreased
$1,599,000
02/04/2026
Price Decreased
$1,649,000
01/14/2026
Status changed to Active
$1,699,000
01/14/2026
Listed by Sailing Home Realty of L I LLC
$1,699,000

Property Details for 21 Astor Avenue

Exterior

Construction

  • Property Condition: Actual
  • Year Built: 2001
  • Architectural Style: Colonial
  • Construction Materials: Frame, Wood Siding

Features

  • Direction Faces: West
  • Other Structures: Cabana, Pool House
  • Patio And Porch Features: Patio, Porch
  • Pool Features: In Ground, Vinyl
  • Pool Private: Yes

Measurements

  • Building Area Total: 4,629
  • Building Area Units: Square Feet
  • Lot Size Acres: 0.75
  • Lot Size Square Feet: 32,670

Financial

Taxes

  • Parcel Number: 0800-087-00-01-00-004-001
  • Tax Annual Amount: $27,522.40
  • Tax Assessed Value: $9,340.00
  • Tax Year: 2025

Interior

Features

  • Appliances: Dishwasher, Gas Range, Microwave, Range, Refrigerator, Washer, Oil Water Heater
  • Fireplace Features: Bedroom, Family Room
  • Fireplace: Yes
  • Fireplaces Total: 2
  • Flooring: Ceramic Tile, Hardwood
  • Interior Features: First Floor Bedroom, First Floor Full Bath, Cathedral Ceiling(s), Crown Molding, Eat-in Kitchen, Entrance Foyer, Formal Dining, Granite Counters, High Ceilings, In-Law Floorplan, Kitchen Island, Open Kitchen, Primary Bathroom, Recessed Lighting, Tray Ceiling(s), Walk-In Closet(s), Washer/Dryer Hookup, Wet Bar

Measurements

  • Living Area: 4,147
  • Living Area Source: Public Records

Rooms

  • Basement: Finished, Full
  • Has Basement: Yes
  • Bathrooms Full: 3
  • Bathrooms Half: 1
  • Bathrooms Total Integer: 4
  • Bedrooms Total: 6
  • Rooms Total: 12

Other

General

  • Exclusions: Dining Room Chandelier & Sconces

Parking

Parking

  • Garage Spaces: 2
  • Garage: Yes
  • Parking Features: Driveway, Garage, Off Street, Private

Schools

Elementary School

  • Elementary School: Mills Pond Elementary School
  • Elementary School District: Smithtown

High School

  • High School: Smithtown High School-East
  • High School District: Smithtown

Middle or Junior School

  • Middle Or Junior School: Nesaquake Middle School
  • Middle Or Junior School District: Smithtown

Utilities

Equipment

  • Cooling: Central Air
  • Heating: Oil, Radiant Floor
  • Sewer: Cesspool
  • Utilities: Electricity Connected, Propane, See Remarks, Water Connected
  • Water Source: Public

Frequently Asked Questions

How many bedrooms and bathrooms does this single-family home have?

There are 6 bedrooms and 4 bathrooms in this single-family home at 21 Astor Avenue.

What schools are nearby to 21 Astor Avenue?

Nearby schools include the Mills Pond Elementary School, Nesaquake Middle School, and Smithtown High School-East.

Does this single-family home have parking?

Yes, there are 2 parking spaces available for 21 Astor Avenue.

What are the annual taxes for 21 Astor Avenue?

Annual taxes for this single-family home are estimated at $27,522.

How does 21 Astor Avenue compare to other single-family homes in St. James?

This single-family home is listed 44% above the average price for single-family homes in St. James and has been on the market for 36 more days than the typical home in this area.

What is the square footage on this single-family home?

According to the MLS, this listing is 4,147 sqft.

21 Astor Avenue is a 6-bedroom, 4-bath single-family home for sale in Saint James NY 11780. Listed on Prevu for 107 days at $1,599,000. This includes a recent price decrease of $50,000. This property features 4,147 square feet of living space, located in St. James. The median listing price for single-family homes in this area is $849,000. Nearby schools include Mills Pond Elementary School, Nesaquake Middle School, and Smithtown High School-East. Additional amenities include private outdoor space, dishwasher, air conditioning, parking, swimming pool, and washer/dryer. View other single-family home listings in Suffolk County.

The data relating to real estate for sale on this website comes in part from the IDX Program of OneKey™ MLS. The source of the displayed data is either the property owner or public record provided by non-governmental third parties. It is believed to be reliable but not guaranteed. This information is provided exclusively for consumers’ personal, non-commercial use. Information Copyright 2026, OneKey™ MLS. All Rights Reserved.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.