20 Old Route 25a, Northport, NY

$1,950,000

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6

Beds

5

Baths

4,426

Square feet

1.00

Acre

About 20 Old Route 25a

Legal 2-family ranch on a full acre in the hamlet of Fort Salonga, Town of Smithtown. Northport mailing address (11768). Kings Park Schools. Legal 2-family layout also works as a multi-generational or mother-daughter home, with two living wings, two kitchens, and separate utility meters. This house is large, with more rooms than can be shown in the listing photos — come see it in person to get the full layout. Approximately 4,426 sq ft with 6 bedrooms, 3 full baths, and 2 half baths. Original home built 1979; extension added 2003. GAF 50-year shingles were installed on the entire house in 2003 at the same time as the addition. Hardwood flooring throughout the main house and the extension. Vaulted ceilings in both houses. Two distinct main-level living wings. Kitchen with center island opens to dining and a vaulted living area with brick fireplace and skylights. Second kitchen and living wing on the main floor. Main bath in the extension has heated flooring and a jacuzzi. Main house has three heating zones: bedrooms, living area, and basement. Central air in the main house is first floor only, with two separate zones: one for the bedrooms and one for the living area. Extension has two heating and cooling zones, one for each floor. Both oil tanks are above ground and located in the basements. Two separate basement areas. The main-house basement is partially finished with rec room and walk-out access from the garage. The extension basement is partially above grade due to the slope of the property, with full-size windows, 10-ft clearance, and a walk-out. In-ground saltwater pool added 2004 with paver patio. Pool has its own drywell so the filter can be backwashed directly into the drywell. Pool is fenced. Property is partially fenced. PVC deck connecting the two houses. Motion-sensor lighting around the exterior. Mature evergreens. Attached two-car garage and long paved driveway with its own lighting. Main house on cesspool; extension on its own septic system. Separate meters for all utilities, including water. Taxes have been grieved; decision pending.

Open House

Sun, Oct 18th, 2026 @ 1pm - 3pm

Features of 20 Old Route 25a

MLS® # 1050930
Price $1,950,000
Bedrooms 6
Bathrooms 5.00
Full Baths 5
Square Footage 4,426
Acres 1.00
Taxes $40,942
Year Built 1979
Type Residential Income
Sub-Type Duplex
Style Exp Ranch, Ranch
Status Active

Community Information

Address 20 Old Route 25a
City Northport
County Suffolk County
State NY
Zip Code 11768
Adult 55+ Community No

Amenities

Utilities Cable Connected, Electricity Connected, Trash Collection Public, Water Connected
Parking Spaces 7
Parking Driveway, Garage, Garage Door Opener
# of Garages 2
Is Waterfront No
Has Pool Yes
Pool Fenced, In Ground, Pool Cover, Salt Water

Interior

Interior Carpet, Ceramic Tile, Hardwood
Interior Features First Floor Bedroom, First Floor Full Bath, Cathedral Ceiling(s), Eat-in Kitchen, Entrance Foyer, Formal Dining, High Ceilings, High Speed Internet, Kitchen Island, Open Floorplan, Primary Bathroom, Storage, Walk Through Kitchen, Walk-In Closet(s)
Heating Oil
Cooling Central Air
Has Basement Yes
Basement Finished, Partial, Storage Space, Unfinished, Walk-Out Access
Fireplace Yes

Exterior

Exterior Features Lighting, Mailbox
Exterior Cedar, Frame

School Information

District Kings Park
Elementary Fort Salonga Elementary School
Middle William T Rogers Middle School
High Kings Park High School

Additional Information

Date Listed September 15th, 2026
Days on Market 23
Short Sale No
RE / Bank Owned No

Listing Details

OfficeREMI Realty
Contact Info516-500-3537

Listing Map

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