Is Islandia, NY 11749 a buyer’s or seller’s market?
Islandia is a seller’s market. With about 3.8 months of supply and 20% of recent sales closing above the original list price, competing offers are common on well-priced homes. Buyers here often have a pre-approval in hand and a plan for the appraisal gap before touring.
Not ranked this month. Fewer than 15 sales in the 3-month window, so the numbers can swing too much to compare fairly. How the heat score works
The Islandia housing market right now
In the three months ending August 31, 2026, 20% of homes in Islandia, NY 11749 sold above their list price, the typical home went under contract in 49 days and there were 3.8 months of supply. Under four months of supply means sellers have the edge: expect competition for well-priced homes. With only 5 sales, these figures can swing a lot from month to month.
Compared with the same period a year earlier, the share selling over asking fell from 43%, homes sold faster (51 days then) and the median sale price fell 4% to $639,723. Overall, Islandia is less competitive than a year ago, which gives buyers more room.
Within Suffolk County, homes here sell more slowly than in 77% of the county’s ZIP codes, and sell less often over asking than in 79%.
Nearby, buyers who want less competition could look at Westhampton 11977 (0% sold over asking) or Water Mill 11976 (0% sold over asking), while West Sayville 11796 (100% sold over asking) and Peconic 11958 (100% sold over asking) are even more competitive.
Run the numbers for 11749
Nearby markets
Amagansett 11930Balanced $988 /sq ftAmityville 11701Seller’s market $442 /sq ftBabylon 11702Seller’s market $455 /sq ftBay Shore 11706Seller’s market $426 /sq ft Browse all markets →Towns like Islandia nearby
Find towns like Islandia in other states →Where Islandia is
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Questions about Islandia real estate
Is Islandia a buyer’s or seller’s market?
A seller’s market: there were 3.8 months of supply in Islandia, NY 11749 in the three months ending August 31, 2026. Under four months usually favors sellers, and more than six favors buyers.
How fast do homes sell in Islandia?
The typical home went under contract in 49 days in the latest three months.
Do homes in Islandia sell over asking?
20% of homes sold above their original list price, and the typical sale closed at 99.5% of the list price.
What are property taxes in Islandia?
About 1.73% of a home’s value a year in Suffolk County, or roughly $6,920 on a $400,000 home.
What is the median home price in Islandia?
The median sale price was $639,723 in the three months ending August 31, 2026, about $366 per square foot.
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Market data describes housing activity only. Figures are rolling 3-month values from Redfin and may be revised. Methodology