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 Formal Living Room With Fireplace 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 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. The 2nd Level Has 5 Bedrooms, A Full Bath, Laundry Room, And A Large Private En-Suite With 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 Pool House! An Incredible Value For This Much House! Make Your Heart Happy This Valentines & Settle Down In The Heart Of Saint James!
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 January 28, 2026
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Source: OneKey #948811
Listing Facts
TypeSingle-family
NeighborhoodSt. James
Bedrooms6
Bathrooms4
Days on Prevu16
Taxes$27,522.4/year
Size4,147 sqft
Price per sqft$410
Amenities
Dishwasher
Private Outdoor Space
Washer/Dryer
Air Conditioning
Parking
Swimming Pool
Location
Mortgage Calculator
Listing History
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
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, Living Room
Fireplace: Yes
Fireplaces Total: 3
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
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 53% above the average price for single-family homes in St. James and has been on the market for 55 less 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. Available on Prevu for 16 days at $1,699,000. This home 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. Property amenities include private outdoor space, dishwasher, air conditioning, parking, swimming pool, and washer/dryer. View other single-family home listings in Suffolk County.
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