Suffolk County and Islip Town property record for 320 Carleton Ave, Central Islip, NY 11722 · Last verified August 2026
| Property Type | Commercial Office |
|---|---|
| Lot Size | 11 acres (481,338 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $460,000 (Mar 2026) |
| Deeds & Mortgages | Mar 2026 Sale Sep 2023 Refinance + 5 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 207.-1-3.42 |
| Primary APN | 472889 207.-1-3.42 |
|---|---|
| Alternative APNs |
|
| Lot Area | 481,338 sqft |
|---|---|
| Lot Width | 617 ft Width |
| Street Address | 320 CARLETON AVE |
|---|---|
| City | CENTRAL ISLIP |
| State | NY |
| Zip | 11722-4506 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Legal Description | N024N00000000 |
| Legal Block | 7000 |
| Legal Lot Number | 100 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 2 |
| Census Block | 2021 |
| Census Tract | 146300 |
Source: Suffolk County and Islip Town records · APN 472889 207.-1-3.42
Assessment roll updated August 11, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 826 BAYVIEW AVE, BELLPORT, NY 11713-1518 |
| Owner Type | Individual |
| Vesting | Tenants in Common |
| Date | Document |
|---|---|
| Mar 25, 2026 | Deed, Transfer |
| Sep 18, 2023 | Deed of Trust, Mortgage · Stand-Alone Refinance ALFRED T DIEUMEGARD |
| Apr 27, 2023 | Deed, Transfer · Stand-Alone Refinance ISLIP TOWN OF |
| Apr 27, 2023 | Quit Claim Deed, Transfer OLD REPUBLIC TITLE |
| Apr 27, 2021 | Deed of Trust, Mortgage · Stand-Alone Refinance ISLAND FCU |
| Dec 13, 2018 | Loan Modification, Consolidation and Extension, Mortgage NEFCU COML LNDG LLC |
| Oct 31, 2018 | Deed of Trust, Mortgage NEFCU COML LNDG LLC |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Mar 25, 2026 · Amount on Record |
| Deed Sale | Mar 25, 2026 · Amount on Record |
| Prior Sale | Apr 27, 2023 · Amount on Record |
| Deed Book / Page | 13330 / 703 |
| Prior Transfer Date | Sep 19, 2022 |
| Prior Transfer Doc | 1319000124 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Mar 25, 2026 |
| Property Address | 320 CARLETON AVE, CENTRAL ISLIP, NY 11722-4506 |
| Document Number | 0133300703 |
| Book / Page | 13330 / 703 |
| Instrument Date | Feb 26, 2026 |
| Transaction Type | Transfer |
| Record Updated | Apr 29, 2026 |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants in Common |
| Address | 826 BAYVIEW AVE, BELLPORT, NY 11713-1518 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 320 CARLETON AVE, CENTRAL ISLIP, NY 11722-4506 |
| Transaction Type | Mortgage |
| Record Updated | Mar 12, 2024 |
| Name | Verified Name |
|---|
| Document Number | 0235350989 |
|---|---|
| Date | Sep 18, 2023 |
| Book Page | 23535/989 |
| Name | ALFRED T DIEUMEGARD |
|---|
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount Recorded |
| Term | 109 Months |
| Due | Oct 01, 2032 |
| Document Type | Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Apr 27, 2023 |
| Property Address | 320 CARLETON AVE, CENTRAL ISLIP, NY 11722-4506 |
| Document Number | 0131990125 |
| Book / Page | 13199 / 125 |
| Instrument Date | Sep 22, 2022 |
| Transaction Type | Transfer |
| Record Updated | Feb 23, 2024 |
| Title Company | MADISON TITLE AGENCY LLC, MADISON TITLE AGENCY, LLC |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 301 CENTRAL AVE # A, A, LAWRENCE, NY 11559-1605 |
| Document Number | 0235020478 |
|---|---|
| Date | Apr 27, 2023 |
| Book Page | 23502/478 |
| Name | ISLIP TOWN OF |
|---|
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount Recorded |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Apr 27, 2023 |
| Property Address | 320 CARLETON AVE, CENTRAL ISLIP, NY 11722-4506 |
| Document Number | 0131990124 |
| Book / Page | 13199 / 124 |
| Instrument Date | Sep 19, 2022 |
| Transaction Type | Transfer |
| Record Updated | Feb 13, 2024 |
| Title Company | OLD REPUBLIC TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 377 OAK ST # STE11, STE11, GARDEN CITY, NY 11530-6553 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 320 CARLETON AVE, CENTRAL ISLIP, NY 11722-4506 |
| Transaction Type | Mortgage |
| Record Updated | Jun 08, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0232650959 |
|---|---|
| Date | Apr 27, 2021 |
| Book Page | 23265/959 |
| Instrument | DM005922 |
| Name | ISLAND FCU |
|---|---|
| Type | Credit Union |
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount Recorded |
| Document Type | Loan Modification, Consolidation and Extension |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Dec 13, 2018 |
| Property Address | 320 CARLETON AVE, CENTRAL ISLIP, NY 11722-4506 |
| Document Number | 0229890040 |
| Book / Page | 022989 / 000040 |
| Instrument Date | Oct 31, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Jan 14, 2020 |
| Title Company | NOT AVAILABLE |
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 377 OAK ST #110 GARDEN CITY NY 115306556, 110, GARDEN CITY, NY 11530-6556 |
| Document Number | 229890040 |
|---|---|
| Date | Dec 13, 2018 |
| Book Page | 022989/000040 |
| Name | NEFCU COML LNDG LLC |
|---|---|
| Address | 1000 CORPORATE DR, WESTBURY, NY 11590-6648 |
| Amount | Amount Recorded |
|---|---|
| Term | 120 Months |
| Due | Dec 12, 2028 |
| Rate | 4.75% |
|---|
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 320 CARLETON AVE, CENTRAL ISLIP, NY 11722-4506 |
| Document Number | 0229890039 |
| Instrument Date | Oct 31, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Feb 11, 2019 |
| Title Company | NOT AVAILABLE |
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 377 OAK ST #110 GARDEN CITY NY 115306556, 110, GARDEN CITY, NY 11530-6556 |
| Document Number | 0229890039 |
|---|---|
| Date | Dec 13, 2018 |
| Book Page | 022989/000039 |
| Name | NEFCU COML LNDG LLC |
|---|---|
| Address | 1000 CORPORATE DR, WESTBURY, NY 11590-6648 |
| Amount | Amount Recorded |
|---|---|
| Term | 120 Months |
| Due | Dec 12, 2028 |
Source: Suffolk County and Islip Town records · Assessment roll updated August 11, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | New York |
| County | Suffolk County |
| County Subdivision | Islip Town |
| Unified School District | Central Islip Union Free School District (PK - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,081,000 (-) Land $387,700 Building $1,693,300 | ||
| 2024 | $29,309,859 (+2.54%) Land $5,460,563 Building $23,849,296 | ||
| 2023 | $2,081,000 (-) Land $387,700 Building $1,693,300 | $28,585,164 (+13.74%) Land $5,325,549 Building $23,259,615 | |
| 2022 | Additional exemption filed | $2,081,000 Land $387,700 Building $1,693,300 | $25,132,850 Land $4,682,367 Building $20,450,483 |
Source: FEMA National Flood Hazard Layer, Suffolk County (36103C), updated September 18, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 361031463002, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Flood Insurance Cost | Premium on Record median of 2 individual NFIP policies nearby |
| Nearby Flood Policies | 2 in force 2 of 2 on primary residences |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
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