Market report · August 2026
Mount Sinai housing market report
Suffolk County · Data as of October 2, 2026 · Based on OneKey® MLS · Updated monthly
12-month median price about flat; inventory down 8.0%; seller's market
Market temperature · months of supply
2.7 months · seller's market
Median sale price
$999K
Last year $783K · +27.7%
Closed sales
13
Last year 12 · +8.3%
Homes for sale
23
Last year 25 · −8.0%
Avg. days on market
32 days
Last year 34 days
% of original list
102.4%
Last year 100.0%
New listings
11
Last year 8 · +37.5%
Month and last 12 months
| Metric | August 2025 | August 2026 | Change | Thru 08/2025 | Thru 08/2026 | Change |
|---|---|---|---|---|---|---|
| New listings | 8 | 11 | +37.5% | 131 | 125 | −4.6% |
| Closed sales | 12 | 13 | +8.3% | 100 | 102 | +2.0% |
| Avg. days on market | 34 | 32 | −5.9% | 42 | 46 | +9.5% |
| Median sale price | $782,500 | $999,000 | +27.7% | $765,000 | $786,000 | +2.7% |
| % of original list | 100.0% | 102.4% | +2.4% | 100.0% | 99.9% | −0.1% |
| Homes for sale / Avg. homes for sale | 25 | 23 | −8.0% | 21 | 19 | −9.5% |
From 2013-01 to 2026-08, the rolling 12-month median moved from $421K to $786K.
Highlights
- 10-year median +91.1%
- 52% sold above original list in 12 months
- $750K–$1M is the busiest band · 39% of sales
For sale today
Mount Sinai Single-family 23 homes
12-month median price up 10.2%; inventory about flat; seller's market
Market temperature · months of supply
3.3 months · seller's market
Median sale price
$688K
Last year $749K · −8.2%
Closed sales
4
Last year 5 · −20.0%
Homes for sale
9
Last year 9 · 0.0%
Avg. days on market
46 days
Last year 35 days
% of original list
99.2%
Last year 100.2%
New listings
8
Last year 4 · +100.0%
Month and last 12 months
| Metric | August 2025 | August 2026 | Change | Thru 08/2025 | Thru 08/2026 | Change |
|---|---|---|---|---|---|---|
| New listings | 4 | 8 | +100.0% | 55 | 42 | −23.6% |
| Closed sales | 5 | 4 | −20.0% | 54 | 33 | −38.9% |
| Avg. days on market | 35 | 46 | +31.4% | 58 | 54 | −6.9% |
| Median sale price | $749,000 | $687,500 | −8.2% | $662,500 | $730,000 | +10.2% |
| % of original list | 100.2% | 99.2% | −1.0% | 98.7% | 97.6% | −1.1% |
| Homes for sale / Avg. homes for sale | 9 | 9 | 0.0% | 8 | 7 | −12.5% |
From 2013-01 to 2026-08, the rolling 12-month median moved from $249K to $730K.
Highlights
- 10-year median +69.8%
- 33% sold above original list in 12 months
- $500K–$750K is the busiest band · 42% of sales
For sale today
Mount Sinai Condo 8 homes
This month's market
Median sale price
—
Last year —
Closed sales
0
Last year 0
Homes for sale
1
Last year 0
Avg. days on market
—
Last year —
% of original list
—
Last year —
New listings
1
Last year 0
Month and last 12 months
| Metric | August 2025 | August 2026 | Change | Thru 08/2025 | Thru 08/2026 | Change |
|---|---|---|---|---|---|---|
| New listings | 0 | 1 | — | 0 | 1 | — |
| Closed sales | 0 | 0 | — | 0 | 0 | — |
| Avg. days on market | — | — | — | — | — | — |
| Median sale price | — | — | — | — | — | — |
| % of original list | — | — | — | — | — | — |
| Homes for sale / Avg. homes for sale | 0 | 1 | — | 0 | 0 | — |
For sale today
Mount Sinai Co-op 0 homes
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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.