Nassau County and Hempstead Town property record for 23 Olsen St, Valley Stream, NY 11580
| Property Type | Single Family Home |
|---|---|
| Details | 1 ba · 1,512 sqft · built 1940 |
| Lot Size | 0.092 acres (4,000 sqft) |
| Owner | Individual Name on File |
| Last Sale | $583,000 (Oct 2022) |
| Tax Bill | $11,635 (2025) |
| Deeds & Mortgages | Oct 2022 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 37-488-00-0325 |
| Primary APN | 37-488-00-0325 |
|---|---|
| Alternative APNs |
|
| Full Baths | 1 Bath |
|---|---|
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,512 sqft Living Area |
| 1st Floor Area | 864 sqft |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1940 |
| Architectural Style | Cape Cod |
| Exterior Material | Brick/Stone |
| Construction Type | Frame |
| Foundation Type | Concrete |
| Roof Material | Other |
| Lot Area | 4,000 sqft (0.092 acres) |
| Lot Dimensions | 101 ft deep x 40 ft wide |
| Garage Type | Detached |
| Garage Area | 209 sqft |
| Parking Spaces | 1 Parking Space |
| Patio Area | 216 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Oil |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 37488 03250 |
|---|---|
| Street Address | 23 OLSEN ST |
| City | VALLEY STREAM |
| State | NY |
| Zip | 11580-1019 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TOWN #1 SCH DIST 016 |
| Legal Block | 488 |
| Legal Lot Number | 325 |
| Jurisdiction | NASSAU NY |
| Township / Civil Division | HEMPSTEAD |
| Census Block Group | 6 |
| Census Block | 6005 |
| Census Tract | 409900 |
23 Olsen St is owned and occupied by an individual who bought it in October 2022.
Source: Nassau County and Hempstead Town records, as of June 17, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 23 OLSEN ST, VALLEY STREAM, NY 11580-1019 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 27, 2022 · Amount on File |
| Deed Sale | Oct 27, 2022 · Amount on File |
| Deed Document Number | 2022106209 |
| Deed Book / Page | 14314 / 473 |
| Record Updated | Oct 29, 2026 |
| Document Type | Bargain and Sale Deed |
|---|---|
| Jurisdiction | NASSAU NY |
| Recording Date | Oct 27, 2022 |
| Property Address | 23 OLSEN ST, VALLEY STREAM, NY 11580-1019 |
| Document Number | D143140473 |
| Book / Page | D14314 / 473 |
| Map Reference | MAP 3861 |
| Instrument Date | Oct 21, 2022 |
| Instrument | 2022-106209 |
| Transaction Type | Transfer |
| Record Updated | Nov 2, 2022 |
| Title Company | JUDICIAL TITLE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $2,332.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 23 OLSEN ST, 23, VALLEY STREAM, NY 11580-1019 |
| Name | Verified Name |
|---|---|
| Address | 23 OLSEN ST, VALLEY STREAM, NY 11580-1019 |
| Document Number | 2022106210 |
|---|---|
| Date | Oct 27, 2022 |
| Instrument | 2022-106210 |
| Name | ROCKET MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Nov 1, 2052 |
The 2025 property tax bill for 23 Olsen St was $11,635.
Source: Nassau County and Hempstead Town assessment roll, as of June 17, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Nassau County |
| County Subdivision | Hempstead Town |
| Elementary School District | Elmont Union Free School District (PK - 06) |
| Secondary School District | Sewanhaka Central High School District (07 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $450 Land $196 Building $254 | $450,000 | |
| 2025 | $11,635.00 | ||
| 2023 | $4,327.00 Homeowner's exemption Disabled Person's exemption Senior Citizen's exemption Veteran's exemption | $450 Land $196 Building $254 | $450,000 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
FEMA maps place 23 Olsen St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1980.
Source: FEMA National Flood Hazard Layer, effective April 5, 2023 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 2 in force |
| Nearby Flood Claims | 1 (1980) |
| Most Recent Claim | Apr 1980 · tidal / storm surge |
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.
The area around 23 Olsen St has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | WA OF WESTERN NASSAU public/private · serves 120,000 people · EPA ID NY2902830 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jan 2026 |
| Lead | 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 888 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber · Fixed Wireless in parts of the area | 2,300 / 2,300 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Spectrum.
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