Is Islip, NY 11751 a buyer’s or seller’s market?
Islip is a seller’s market. With about 1.9 months of supply and 63% 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.
#44 of 125 ZIP codes in Nassau & Suffolk counties, NY, and #192 of 531 across all the markets we track.
Based on share sold above original list, sale-to-list ratio, months of supply and days on market for the 3 months ending August 31, 2026. How the heat score works
The Islip housing market right now
In the three months ending August 31, 2026, 63% of homes in Islip, NY 11751 sold above their list price, the typical home went under contract in 25 days and there were 1.9 months of supply. Under four months of supply means sellers have the edge: expect competition for well-priced homes. That’s based on 44 home sales.
Compared with the same period a year earlier, the share selling over asking was about the same (63% then), homes sold faster (31 days then) and the median sale price fell 9% to $634,725. Overall, Islip is about as competitive as it was a year ago.
Within Suffolk County, homes here sell faster than in 57% of the county’s ZIP codes, and sell more often over asking than in 59%. On our competition score, Islip ranks #194 of 649 NY ZIP codes with enough sales (score 89 out of 100).
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 11751
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 Islip nearby
Find towns like Islip in other states →Where Islip is
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Questions about Islip real estate
Is Islip a buyer’s or seller’s market?
A seller’s market: there were 1.9 months of supply in Islip, NY 11751 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 Islip?
The typical home went under contract in 25 days in the latest three months.
Do homes in Islip sell over asking?
63% of homes sold above their original list price, and the typical sale closed at 103.5% of the list price.
What are property taxes in Islip?
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 Islip?
The median sale price was $634,725 in the three months ending August 31, 2026, about $434 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