Four places carry this name, and the data disagrees about which one
Pin the geography down first. Separate census geographies exist for (TIGERweb place layers):
- Massapequa, a census designated place;
- Massapequa Park, an incorporated village;
- North Massapequa, a CDP;
- East Massapequa, a CDP.
Each American Community Survey number below describes the Massapequa CDP alone, while anything keyed to a postal locality — spill records, service line filings — sweeps in the neighboring communities too. ZIP 11758 carries 18,066 inventoried service lines against 7,393 housing units inside the CDP.
Town jurisdiction, with a village line through the name
This CDP sits in the Town of Oyster Bay, county subdivision 3605956000. Lacking a government of its own, it looks to the town for permits and the certificate of occupancy record. An address inside the village of Massapequa Park is a different filing office entirely, and a search aimed at the wrong one comes back empty rather than clean.
A single-decade stock of detached houses
Housing units total 7,393, at a median year built of 1956 give or take two (the median year table). The bands: 3,719 from the 1950s, 1,432 from the 1960s, 719 from the 1940s and 592 before 1940 (the year-built bands). Structure type is concentrated, 7,169 of the 7,393 being detached single-unit houses, with 97 in two-unit buildings and 39 attached (structure type). Tenure: 6,966 owner-occupied of 7,193 (owner and renter counts). Housing that uniform repeats its defects street by street; what distinguishes one house is which original components have already been swapped out.
A tenth of the mapped area is water
Against 3.56 square miles of land there are 0.43 of water, so 10.9 percent of the CDP is recorded as water (TIGERweb place layers). The layer gives a share and stops there. Ask FEMA's National Flood Hazard Layer what is mapped inside the census boundary and the answer is AE, VE and Zone X in both forms, shaded at the 0.2 percent annual chance and unshaded, on identifier 36059C. VE marks coastal high hazard, where wave action is expected. The shaded band lies beyond the compulsory-purchase line and is still drawn as ground that floods. None of that resolves one address: the panel for the parcel comes from the FEMA Flood Map Service Center, and the NY Rising plan for the Massapequas covers several of those communities as one planning area.
What the waterfront adds to a purchase
State general permit GP-1-22-001 covers bulkhead removal and replacement across Nassau and Suffolk tidal wetland areas, and then carves ground back out of itself — a coastal erosion hazard area among it. For anything standing on the carved-out ground the permit is blunt: “An individual permit is required for projects in these excluded areas.” Which of the two routes a replacement takes is a contract-period question.
Sewer: named by the county, unproven at the parcel
Four rows, one authority. The county health department's roster of public sewer collection districts enters Massapequa, Massapequa East, Massapequa Park and North Massapequa alike against the Nassau County Department of Public Works, and marks none of them as handling collection locally.
No date is printed on the roster, and the server offers no last-modified header, so nobody can vouch for its currency. It also names an authority for a community without certifying that a particular parcel is tied into a main — the county's own septic pages put tens of thousands of Nassau properties “currently served by cesspools and septic systems,” and its grant program offers up to $20,000 for a nitrogen-reducing system. Its conditions cut the other way: eligibility turns on a property not being “located within an existing or proposed sewer district,” unless the district records that connection is out of reach. Four roster rows of collection district make that a thin hope here. With four Massapequa communities on that roster, a buyer first has to know which one the county means for their street. Run the parcel through the county's Land Records Viewer.
Oil, tanks and the reported spill record
Fuel oil or kerosene heats 2,424 of 7,193 occupied units, alongside 4,358 on utility gas, 183 on electricity and 81 on solar (heating fuel). More than 1,700 incidents sit under this locality name in the state's cumulative spill file as of September 2026, over 1,500 in the petroleum family, private dwelling leading — postal-locality counts, so they take in the neighboring communities, and they tally reports rather than properties. Where a 1950s house has converted away from oil, a tank filled in place beneath a driveway is as likely as a tank lifted out; ask for the abandonment documentation, not the conversion invoice.
Who supplies the water
The county's water is groundwater from beneath Long Island, through 46 public water systems and roughly 500 private wells (county public water supply). The state's Nassau public water system roster carries a community system recorded as MASSAPEQUA WD, identifier NY2902837 — but it records no service areas, so it cannot establish the supplier for any address. The service line inventory sorts on a typed place name, which this one meets in two casings: 10,218 non-lead, three lead, three galvanized requiring replacement and 116 unknown in one, 6,462 non-lead with 1,261 unknown in the other. Both cover the wider postal place counted above, not the CDP, and neither identifies a utility — the file has no PWSID column. A line recorded unknown has not been found to be anything.
Two station names on one branch
Code MQA, Babylon Branch, fare zone 7, accessibility FULL in the state's rail stations dataset — the state's entry, nothing observed on site. A second Babylon Branch station name begins with the same word and belongs to the village, so naming one has not named the other.