As of January 2026, the county’s least and most expensive active listings couldn’t be more different, offering a snapshot of just how wildly varied homeownership can look on Long Island.
Whether you’re dreaming of marina sunsets or private docks and tennis courts, these two listings sit at opposite ends of Nassau’s housing spectrum.
The Most Affordable Listing: $165,000 In Seaford
The county’s lowest-priced listing isn’t a traditional house at all — it’s a floating home.
Listed at $165,000, the two-bedroom, one-bath houseboat at 220 Shore Road in Seaford offers about 1,100 square feet of waterfront living, according to LaQuinta Premier Properties.
Built in 1984, the property is docked at Slip No. 2 and delivers unobstructed bay views typically reserved for far pricier homes.
The houseboat features an open, sunlit layout with a skylight-topped living room, an eat-in kitchen with granite counters, and sliding doors that open to an upper deck overlooking the water, according to the listing. A dedicated office nook sits beside the primary bedroom, which looks out onto the bay.
A spiral staircase leads to a lower floating dock with space for a 22-foot boat, while the rooftop deck offers sweeping sunset views across the bay, the listing notes. The home also includes forced-air heat, updated mechanical systems, storage sheds, and multiple surrounding docks.
Cash buyers only — but for those seeking laid-back marina living, the listing bills it as a rare chance to own waterfront property at an entry-level price point.
Click here to view the complete listing on Zillow.
The Most Expensive Listing: $35 Million In Great Neck
At the other end of the spectrum sits Swan Landing, a palatial $35 million waterfront estate at 227 Dock Lane in Great Neck, listed by Sotheby’s International Realty.
The stone-and-shingle residence spans roughly 23,000 square feet on 5.4 acres, offering 13 bedrooms and 14 bathrooms in a secluded North Shore setting overlooking Manhasset Bay.
Designed by Shope Reno Wharton Associates, the estate is approached by a long, tree-lined drive that opens to formal gardens and a grand façade. Inside, the home features soaring ceilings, multiple libraries anchored by antique fireplaces, formal entertaining spaces, and expansive water views throughout, according to the listing.
The chef’s kitchen, breakfast room, and formal dining areas flow seamlessly to outdoor terraces overlooking the bay, while bespoke architectural details — from custom millwork to stained glass accents — appear throughout the home.
The primary suite includes dual ensuite bathrooms, dressing rooms, and sweeping waterfront views. Additional amenities include a wine cellar, office spaces, staff quarters, a gated elevator, and multiple guest wings.
The estate’s grounds are equally elaborate, featuring a waterfront tennis court, romantic lily pond, English gardens, private dock and beach, indoor and outdoor saltwater pools, and a separate guest cottage, according to the listing.
Described as irreplaceable in scale and craftsmanship, Swan Landing offers a glimpse into the ultra-luxury end of Nassau County real estate.
Click here to view the complete listing from Zillow.
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