Market report · August 2026
Islip housing market report
Suffolk County · Data as of October 2, 2026 · Based on OneKey® MLS · Updated monthly
12-month median price up 7.2%; inventory down 6.2%; seller's market
Market temperature · months of supply
1.8 months · seller's market
Median sale price
$675K
Last year $668K · +1.1%
Closed sales
7
Last year 8 · −12.5%
Homes for sale
15
Last year 16 · −6.2%
Avg. days on market
19 days
Last year 26 days
% of original list
107.7%
Last year 106.7%
New listings
13
Last year 14 · −7.1%
Month and last 12 months
| Metric | August 2025 | August 2026 | Change | Thru 08/2025 | Thru 08/2026 | Change |
|---|---|---|---|---|---|---|
| New listings | 14 | 13 | −7.1% | 145 | 117 | −19.3% |
| Closed sales | 8 | 7 | −12.5% | 105 | 102 | −2.9% |
| Avg. days on market | 26 | 19 | −26.9% | 34 | 48 | +41.2% |
| Median sale price | $667,500 | $675,000 | +1.1% | $670,000 | $718,000 | +7.2% |
| % of original list | 106.7% | 107.7% | +0.9% | 103.0% | 102.2% | −0.8% |
| Homes for sale / Avg. homes for sale | 16 | 15 | −6.2% | 19 | 17 | −10.5% |
From 2013-01 to 2026-08, the rolling 12-month median moved from $315K to $718K.
Highlights
- 10-year median +121.0%
- 58% sold above original list in 12 months
- $500K–$750K is the busiest band · 53% of sales
For sale today
Islip Single-family 19 homes
12-month median price down 17.9%; inventory down 100.0%; seller's market
Market temperature · months of supply
0 months · seller's market
Median sale price
—
Last year —
Closed sales
0
Last year 0
Homes for sale
0
Last year 1 · −100.0%
Avg. days on market
—
Last year —
% of original list
—
Last year —
New listings
0
Last year 0
Month and last 12 months
| Metric | August 2025 | August 2026 | Change | Thru 08/2025 | Thru 08/2026 | Change |
|---|---|---|---|---|---|---|
| New listings | 0 | 0 | — | 4 | 3 | −25.0% |
| Closed sales | 0 | 0 | — | 1 | 3 | +200.0% |
| Avg. days on market | — | — | — | 14 | 62 | +342.9% |
| Median sale price | — | — | — | $725,000 | $595,000 | −17.9% |
| % of original list | — | — | — | 121.0% | 96.5% | −20.2% |
| Homes for sale / Avg. homes for sale | 1 | 0 | −100.0% | 0 | 1 | — |
From 2013-01 to 2026-08, the rolling 12-month median moved from $595K to $595K.
For sale today
Islip Condo 0 homes
12-month median price about flat; inventory up 62.5%; balanced market
Market temperature · months of supply
4 months · balanced market
Median sale price
$263K
Last year $307K · −14.5%
Closed sales
4
Last year 1 · +300.0%
Homes for sale
13
Last year 8 · +62.5%
Avg. days on market
65 days
Last year 18 days
% of original list
95.1%
Last year 110.0%
New listings
6
Last year 3 · +100.0%
Month and last 12 months
| Metric | August 2025 | August 2026 | Change | Thru 08/2025 | Thru 08/2026 | Change |
|---|---|---|---|---|---|---|
| New listings | 3 | 6 | +100.0% | 42 | 53 | +26.2% |
| Closed sales | 1 | 4 | +300.0% | 19 | 39 | +105.3% |
| Avg. days on market | 18 | 65 | +261.1% | 41 | 50 | +22.0% |
| Median sale price | $307,000 | $262,500 | −14.5% | $265,000 | $270,000 | +1.9% |
| % of original list | 110.0% | 95.1% | −13.5% | 101.6% | 98.6% | −3.0% |
| Homes for sale / Avg. homes for sale | 8 | 13 | +62.5% | 7 | 11 | +57.1% |
From 2013-01 to 2026-08, the rolling 12-month median moved from $130K to $270K.
Highlights
- 10-year median +157.1%
- 49% sold above original list in 12 months
- $250K–$500K is the busiest band · 64% of sales
For sale today
Islip Co-op 13 homes
Curious what your home is worth?
Source: OneKey® MLS, calculated by Homix following OneKey's market report method; figures may differ slightly from OneKey's own reports. Prices do not account for concessions or down-payment assistance; small samples can make percent changes look extreme.