Long Island Home Prices September 2026: Nassau Median $860,000, Suffolk Median $740,000
Home prices on Long Island rose in September 2026 in both Nassau and Suffolk counties, even as the two counties moved in opposite directions on closed sales. That split is the clearest headline in the latest OneKey MLS Local Market Update reports for September 2026.
In Nassau County, the single-family median sale price reached $860,000 in September 2026, up 2.1% from $842,500 in September 2025. In Suffolk County, the single-family median sale price reached $740,000, up 2.8% from $720,000 a year earlier. The two medians are reported separately here, as published. No combined median is published in either county report, and none is calculated here.
All figures in this article cover single-family homes in September 2026 compared with September 2025, unless a different period is stated. Data are current as of October 7, 2026, per OneKey MLS. Price measures marked with an asterisk in the source reports do not account for sale concessions or downpayment assistance.
Nassau County: higher median, fewer closed sales
Nassau County recorded 757 single-family closed sales in September 2026, down 4.1% from 789 in September 2025. New listings also fell, to 929 from 1,037 a year earlier, a drop of 10.4%. Inventory of homes for sale stood at 2,318, down 1.7% from 2,357.
Homes sold a little faster in Nassau. Days on market until sale averaged 40 days in September 2026, down 7.0% from 43 days in September 2025.
Sellers in Nassau received, on average, 99.8% of the original list price in September 2026, up 0.9 percentage points from 98.9% a year earlier. That figure is a move in percentage points, not a percent change, because it compares two percentages directly.
These directions are reported side by side here, without a claim that one caused the other.
Suffolk County: higher median, more closed sales
Suffolk County tells a different sales story. Closed sales rose to 1,041 in September 2026, up 4.6% from 995 in September 2025. That increase stands in contrast to the decline in Nassau, and it is worth noting plainly: the counties did not move together on closed sales.
Suffolk's single-family median sale price still rose, to $740,000 from $720,000, a gain of 2.8%. New listings fell to 1,287 from 1,364, a drop of 5.6%. Inventory of homes for sale stood at 3,220, down 2.9% from 3,315.
Days on market until sale in Suffolk averaged 40 days in September 2026, down 9.1% from 44 days a year earlier. Sellers in Suffolk received, on average, 101.0% of the original list price in September 2026, up 0.5 percentage points from 100.5% a year earlier. As with Nassau, this is stated as a percentage point move, not a percent change.
The single-family figures at a glance
The table below covers single-family homes only. Condo and co-op figures are kept in a separate section below and are not mixed into these numbers.
| Metric | Nassau, Sept 2025 | Nassau, Sept 2026 | Suffolk, Sept 2025 | Suffolk, Sept 2026 | | --- | --- | --- | --- | --- | | Median sale price | $842,500 | $860,000, up 2.1% | $720,000 | $740,000, up 2.8% | | Closed sales | 789 | 757, down 4.1% | 995 | 1,041, up 4.6% | | New listings | 1,037 | 929, down 10.4% | 1,364 | 1,287, down 5.6% | | Inventory of homes for sale | 2,357 | 2,318, down 1.7% | 3,315 | 3,220, down 2.9% | | Days on market until sale | 43 | 40, down 7.0% | 44 | 40, down 9.1% | | Percent of original list price received | 98.9% | 99.8%, up 0.9 percentage points | 100.5% | 101.0%, up 0.5 percentage points |
Adding the two counties' single-family figures together, and only those figures, gives a combined inventory of 5,538 homes for sale in September 2026, down 2.4% from 5,672 a year earlier. Combined single-family new listings totaled 2,216, down 7.7% from 2,401. These combined totals cover Nassau and Suffolk single-family homes only. They are not a broader regional figure.
What this means if you are buying or selling
If you are buying in Nassau, September's data show a higher median price, fewer closed sales than a year earlier, and fewer new listings. Financing arranged in advance puts a buyer in a stronger position when a suitable home appears. For context on borrowing costs, see our coverage of the 30-year mortgage rate at 7.32%.
If you are buying in Suffolk, closed sales rose even as new listings and inventory fell year over year. Days on market averaged 40 days in September, so watching new listings closely is worthwhile.
If you are selling in either county, price with recent single-family sales in the same county in mind, rather than a combined or averaged figure. A median describes the middle sale, not every sale, and individual homes will sit above or below it based on condition, location, and lot.
A separate note on condos and co-ops
The figures above are single-family homes only. Condo and co-op medians for September 2026, kept separate here, moved differently by county and property type.
In Nassau County, the condo median sale price was $785,000 in September 2026, down 2.6% from $806,000 a year earlier. The Nassau co-op median was $350,000, up 0.7% from $347,500.
In Suffolk County, the condo median sale price was $582,500, up 12.6% from $517,500 a year earlier. The Suffolk co-op median was $285,000, up 5.6% from $270,000.
These medians must not be mixed with the single-family medians above.
Rolling 12-month figures, clearly labelled
Both county reports also publish a rolling 12-month column, covering the last 12 months through September 2026. Those figures are not September single-month figures, and they are labelled as rolling figures here to avoid confusion.
For Nassau single-family homes, the rolling 12-month median through September 2026 was $860,000, compared with $820,000 through September 2025, up 4.9%. For Suffolk single-family homes, the rolling 12-month median through September 2026 was $725,000, compared with $685,000 through September 2025, up 5.8%. The Suffolk rolling figure of $725,000 is a 12-month figure only. Suffolk's September single-month single-family median, reported in the headline section above, is $740,000.
Percent changes in the source reports are calculated using rounded figures, per the reports' own note.
Frequently Asked Questions
What was the Long Island single-family median sale price in September 2026?
There is no single published Long Island median in the two county reports. Nassau County's single-family median was $860,000, up 2.1% from $842,500 in September 2025. Suffolk County's single-family median was $740,000, up 2.8% from $720,000. The counties are reported separately, not averaged.
Did closed sales rise or fall in September 2026?
It depended on the county. Nassau closed sales fell 4.1%, to 757 from 789. Suffolk closed sales rose 4.6%, to 1,041 from 995. Both figures cover single-family homes in September 2026 compared with September 2025.
How long did homes take to sell?
Days on market until sale averaged 40 days in both counties in September 2026. In Nassau, that was down 7.0% from 43 days a year earlier. In Suffolk, it was down 9.1% from 44 days a year earlier.
What share of the original list price did sellers receive?
In Nassau, sellers received 99.8% of the original list price on average in September 2026, up 0.9 percentage points from 98.9%. In Suffolk, sellers received 101.0%, up 0.5 percentage points from 100.5%. These are percentage point moves, not percent changes.
How many single-family homes were for sale?
In September 2026, inventory of single-family homes for sale was 2,318 in Nassau, down 1.7% from 2,357, and 3,220 in Suffolk, down 2.9% from 3,315. Added together, the two counties' single-family inventory was 5,538, down 2.4% from 5,672 a year earlier.
Do these price figures account for sale concessions or downpayment assistance?
No. Price measures marked with an asterisk in the OneKey MLS reports do not account for sale concessions or downpayment assistance. That footnote applies to the price claims in this article.
Where do these figures come from?
They come from the OneKey MLS Local Market Update reports for September 2026 for Nassau County and Suffolk County, current as of October 7, 2026. All data are from OneKey MLS, with report copyright 2026 ShowingTime Plus, LLC.
