1 / 40 
Welcome to 123 Old Post Drive, a spacious and beautifully maintained 4-bedroom, 3-bath Colonial set on an oversized property in the heart of Hauppauge. This inviting home features a formal living room, formal dining room, and a warm and comfortable family room with a wood-burning fireplace. The bright kitchen offers generous cabinetry, ample counter space, and stainless-steel appliances.
Beautiful hardwood floors, Pella and Andersen windows, and generously sized rooms add to the home’s appeal. A fully finished basement provides valuable additional living and entertaining space, while the 2-car garage and generator hookup offer added convenience.
Set on an oversized lot with plenty of room to enjoy the outdoors, this home offers the perfect combination of space, comfort, and classic charm.
| Listed | September 23, 2026 |
| Days on Market | 17 |
| Last Updated | October 5, 2026 |
Full public sale/price history isn't available through our listing feed for this property.
Drag the sliders above to model your own purchase price, term, down payment, and rate — the numbers update live. For a precise breakdown, use our NYC Buyer Closing Cost Calculator and Commission Rebate Calculator.
123 Old Post Drive – For Sale
123 Old Post Drive – For Sale
Due to recent rule changes, buyer agent commissions are no longer advertised on the MLS. NestApple estimates your rebate as up to 2% of the purchase price, based on our standard commission-sharing arrangement. Prior to any showing, we will confirm the exact commission and rebate amount with the listing agent and with you in writing. Commissions are not set by law and are fully negotiable. Listing information for this property is sourced via the REBNY RLS, which does not fix, control, recommend, suggest or maintain any commission rates and/or fees for services, and is not the source of any commission information.
Closed-sale data isn't available through our current listing feed for this neighborhood.
