Commercial Real Estate Market in Islandia, NY
Updated monthly: sale, lease, property records, location trend, and more… · Last update: September 30
79 active listings and 1,732 off-market properties in Islandia, NY. Commercial property asks $34/SF to buy and $21.73/SF/Yr to lease.
Market Trends
Islandia, NY spans 2.2 square miles in Suffolk County, New York. Figures below refresh monthly; last updated 30 September 2026.
Office
Office vacancy in Islandia, NY runs 19.9% across the Northeast region in 2025, up from 13.1% in 2019.
Vacancy Rate % in Northeast region
Retail
Retail vacancy in Islandia, NY runs 6% across the Northeast region in 2025, little changed from 6% in 2019. Down from a 2020 peak of 7.1%.
Vacancy Rate % in Northeast region
Industrial
Industrial vacancy in Islandia, NY runs 7.6% across the Northeast region in 2025, up from 5.4% in 2019. Nearly 2.4x the 2021 low of 3.2%.
Vacancy Rate % in Northeast region
Multifamily
Multifamily vacancy in Islandia, NY runs 5.6% across the Northeast region in 2025, up from 4% in 2022.
Vacancy Rate % in Northeast region
Zoning & Land Use
Land Use Mix share of zoned land by category
- Residential 39.5%
- Open space 18.3%
- Industrial 14.5%
- Commercial 5.3%
- Agricultural 0.5%
Largest Zones share of zoned land by district
Low Density Residential
Medium Density Residential
Greenbelt
Office
Industry
Islandia, NY zones 1,328 acres across 12 districts. Commercial zoning covers 5.3% of zoned land, residential 39.5%, open space 18.3% and industrial 14.5%. The largest single district is Low Density Residential at 18.5%. For commercial buyers the practical constraint is that only 19.8% of land carries a commercial or industrial designation.
Office (O)
Attachment 5 - Office and Industrial Districts: Table of Use Regulations Attachment 6 - Schedule of Sign Regulations Attachment 7 - Parking Schedule Attachment 8 - Design Guidelines for Solar Roofs Article I General Provisions
Market overview
Demographics & Economy
Islandia, NY has 3,567 residents in 1,324 households. Density runs 1,631 people per square mile. Median household income here is $112,435 and median gross rent $1,781 a month.
3,567
Population
1,324
Households
2.7
Avg Household Size
48
Median Age
31%
College-Educated
89%
High-School Grad
2.2 sq mi
ZIP Area
1,631
Density / Sq Mi
$112,435
Median Household Income
$51,027
Median Earnings
$1,781
Median Rent
$451,700
Median Home Value
Tools
Nearby Markets
| Market | Average Sale Price, $/SF | Average Lease Price, $/SF/Yr |
|---|---|---|
| Hauppauge | — | — |
| Nesconset | — | — |
| Bohemia | — | — |
Commercial property in Islandia, NY asks $34/SF.
Frequently Asked Questions
What is the average price per square foot for commercial property in Islandia?
Commercial property in Islandia, NY asks an average of $34 per square foot.
How much does it cost to lease commercial space in Islandia?
Asking lease rates in Islandia, NY average $21.73 per square foot per year.
What zoning applies to commercial property in Islandia?
Islandia, NY zones 1,328 acres across 12 districts, of which 5.3% is commercial and 14.5% industrial. The largest single district is Low Density Residential at 18.5% of zoned land. Residential zoning covers 39.5% and open space 18.3%.
Where does Realmo's Islandia market data come from?
Realmo compiles Islandia, NY figures from 7 recent recorded sales, 25 active sale listings, 54 active lease listings, 1,732 tracked off-market properties, the current Islandia zoning release. Sale and lease figures refresh monthly; vacancy annually. Last updated 30 September 2026.
Methodology & data sources
- Asking prices and averages
- Computed from 25 active for-sale and 54 active for-lease listings in Islandia, NY. These are ASKING figures from live listings, not closed-transaction prices, and a segment carried by a handful of listings reads as indicative rather than an average.
- Vacancy rates
- Published per-sector market series, taken at the metro level where one exists and otherwise at the Census-region level — a chart reading "in <region> region" is a regional number, not this city's.
- Zoning and land use
- The current municipal zoning release: 1,328 zoned acres across 12 districts. Shares are of zoned land, so parcels the release leaves unclassified are excluded from the mix.
- Refresh
- The monthly aggregates close at the end of the previous month, so 30 September 2026 — not today — is the honest last update.
- Known limitations
- office vacancy is reported at Northeast region level, retail vacancy is reported at Northeast region level and industrial vacancy is reported at Northeast region level.
- Coverage
- Metrics below the 10-observation threshold fall back one geographic level. The geography used is named on each figure.
Compiled by the Realmo Data team · reviewed 30 September 2026 · report a data issue
