A mailing address, a census place and a town
Port Washington is a census designated place: unincorporated, no village government, and the census places it in the Town of North Hempstead. FEMA confirms it from the opposite side, since the state list carries no NFIP community named for the census place itself, leaving the town as the governing community for an unincorporated address here (community status book for New York). Permits, the certificate of occupancy search and the violation history are therefore held by the town's Department of Building, Safety, Inspection and Enforcement.
The ZIP code is where buyers come unstuck. An 11050 address may land in Baxter Estates, Manorhaven, Port Washington North, Sands Point or Flower Hill, each an incorporated village running its own building department, several of them on the county's unsewered list while the census place is not. State records show the overlap: the health department's Nassau water list gives the Sands Point village water department a Port Washington, NY 11050 address. A mailing address is not a jurisdiction.
Sewer: a district row, and what it does not prove
The county's community table names the Port Washington Water Pollution Control District at 70 Harbor Rd. as the authority for the row it prints as "Port Washington" (Sewer Districts by Community). The same document assigns Baxter Estates and Flower Hill's eastern portion to that district. Thirty-four rows elsewhere in it carry the status "Not Publicly Sewered," and Sands Point, Plandome, Plandome Heights, the western portion of Flower Hill and Plandome Manor, whose name the file misspells, are among them. Nassau separately names a Port Washington plant among the facilities in its sewage treatment consolidation study, but publishes no community-by-community service area, so no address here can be matched to a plant.
Weigh that row against what the file cannot tell you. No revision line is printed in it and the server hands back no modification time, so its vintage is guesswork. Membership is also recorded by community name, which means a house standing inside the district may still sit over a cesspool nobody ever disconnected. Check the parcel in the county's land records viewer, then make the seller answer question 28 of the state disclosure form, which asks whether the system is public sewer, private sewer, septic or cesspool and, for the latter two, its age, date last pumped and pumping frequency.
Oil heat, and what an old tank leaves behind
Fuel oil heats 1,223 of the 6,115 occupied units here, one in five, as counted over 2020 to 2024 (house heating fuel, B25040). That matters less as a heating statistic than as a tank statistic. Converting from oil to gas does not necessarily mean the old tank came out of the ground, which is why question 14 of the disclosure form asks whether fuel storage tanks are, or have ever been, above or below ground, and whether any "are leaking or have ever leaked." Question 18 asks the broader release question. Ask for the abandonment paperwork; an assurance that it was taken care of is not a record.
The register returns seven, and one of them is Class 2
Filtered on a Port Washington locality, the state's remediation site register returns seven programme numbers:
- 130108, Plaza Cleaners, 966 Port Washington Blvd, Class 2
- 130025, Port Washington LF (N. Hempstead LF), Shore Road, Class 4
- 130081, Former Munsey Cleaners, 1029 Port Washington Boulevard, Class 4
- 130169, Chez Valet Dry Cleaners, 1 Manorhaven Blvd., completed
- 130196, Naval Device Training Center DOD Grant, 127 Middleneck Road, no further action
- 130235 and V00400, both the Port Washington N12 railroad site at Bayles and Davis Avenues, active and no further action
The state calls a Class 2 site one where "the disposal of hazardous waste has been confirmed and the presence of such hazardous waste or its components or breakdown products represents a significant threat to public health or the environment," and a Class 4 site one "that has been properly closed but that requires continued site management consisting of operation, maintenance and/or monitoring" (class definitions). The LF in the Shore Road entry stands for landfill, and question 13 of the disclosure form asks whether a property was ever the site of one. Because the register indexes by postal locality, each entry above is a site listed at a Port Washington address, which is narrower than a site inside a boundary.
The houses
Stock here totals 6,486 housing units, with the survey putting the middle of the construction range at 1953, plus or minus two years (B25035). The pre-1940 bracket holds 2,168 units and the 1950s bracket 1,901, so roughly 4,542 date from 1959 or earlier, with 434 added in the 2000s and 258 in the 2010s (B25034). Detached single-family houses number 4,652 and 684 units sit in buildings of fifty or more (B25024). Owners hold 4,701 of the occupied units, with 1,414 rented (B25003).
A detached house of the mid-1950s typically carries a service panel sized for the appliances of that decade and a roof replaced more than once since. Where a property near the water has a bulkhead, a dock or a retaining wall, each is a structure with a maintenance history and a permit trail of its own.
Flood
Because the place is unincorporated, insurance is written against the town: TOWN OF NORTH HEMPSTEAD, number 360482, initial FIRM 15 April 1977, currently effective map date 11 September 2009. That row shows no Community Rating System entry, so no rated discount applies here. Port Washington North is a separate village with its own number and dates; nothing transfers between them. No zone and no elevation appears here for anywhere in the place, and a Zone X designation is no exemption, since the 500-year floodplain sits inside that label. Read the panel for the lot at the FEMA Map Service Center. For the water source, the state health department's Nassau list carries PORT WASHINGTON WD, identification number NY2912267, serving a listed population of 34,000, while nearby Plandome and Sands Point appear as separate systems; the list draws no service boundaries, so question 26 of the disclosure form remains the per-house answer.