Two building eras, and the survey cannot rank them
Of 8,051 housing units in the 2020-2024 American Community Survey, 2,860 date from 1939 or earlier and 2,850 from the 1950s, figures whose margins of error, plus or minus 314 and plus or minus 362, overlap heavily, so neither decade can be called the bigger (table B25034). What the table supports is the weight: 6,691 units, roughly 83 percent, predate 1960, and 7,551, roughly 94 percent, predate 1980. More than a third of everything standing is pre-war.
6,702 units are single-family detached (table B25024), and of 7,655 occupied units 7,171 are owner-occupied (table B25003). Reported heating fuel gives 6,089 on utility gas and 958 on fuel oil (table B25040). Several categories in these tables carry margins as wide as their own estimates, which makes them unusable as counts.
In a house of this age most of what gets reported on is the replacement rather than the original: when the electrical service was upgraded and whether branch circuits went with it, how far a supply repipe reached, whether a heating plant was swapped without the flue being resized. If the roof is slate or tile, whether an earlier repair was made in kind is a question apart from the roof's age. The build decade predicts none of it; the paperwork settles it.
An incorporated village, so the file is the village's
The Census Bureau records Garden City as an incorporated village and places it in the Town of Hempstead. Under the state's general rule a municipality administers and enforces building codes inside its own jurisdiction, the codes in question being the Uniform Code and the Energy Code as carried in Title 19 of New York's regulations (building standards and codes). An incorporated village therefore keeps its own building department, and with it the occupancy record and the violation history. A mailing address and a village boundary are drawn for different purposes and need not agree, so match the parcel to the government before requesting anything.
The village collects the sewage
Nassau County's community table records the row as Garden City with an asterisk, authority Garden City Village, at 351 Stewart Avenue, and that asterisk points to a footnote, repeated throughout the file, confining the village's role to collection (sewer districts by community). The village is absent from the same document's roster of 34 communities marked Not Publicly Sewered. Nothing in the file is dated and its host returns no modification time, so quote it as the county's listing, not today's position.
A row of this kind covers an area, not a lot, and an abandoned cesspool can sit under a lawn for decades after the street was piped, so the assessment record on the county Land Records Viewer plus a written statement from the seller do what the table cannot. The county SEPTIC grant program is generally shut to any address inside a district, unless the district documents that the property cannot connect.
Names that are not this village
The same county table lists Garden City Park and Garden City So. as separate communities, each assigned to the Nassau County Department of Public Works. The state's water list adds a third: Garden City Park Water District, NY2902825, serving 18,000, a different system for a different place.
Water from the village as well
Garden City (V) Water District appears on the state health department's Nassau list under public water system NY2902824, with 23,272 served and 351 Stewart Avenue given as its address (Nassau public water contacts). Note the identifier as well as the name; the district above carries a near-identical one with a different number. Supply areas are nowhere published, so the invoices decide.
Where the flood answer actually lives
FEMA's Community Status Book lists Garden City, Village of as CID 361631#, initial FIRM 04/02/97, regular program 10/07/08 (community status book). In place of a current effective map date the column holds the marker (NSFHA), which the legend printed at the foot of that report expands as “No Special Flood Hazard Area - All Zone C”. Both Community Rating System columns sit blank, ruling out any discount on a flood insurance premium here.
What that records is a community's standing in a federal program, not the condition of any parcel. With a marker in the map-date cell, the revision history cannot be read off the row either. The panel at the FEMA Map Service Center gives the zone, the panel number and the effective date, and its letter needs reading on its own terms, because Zone X holds the 0.2 percent annual chance floodplain.
Station rows, as the state publishes them
The state's rail station dataset publishes a row per station, and the rows are all that is claimed here: Garden City, Hempstead Branch, code GCY, fare zone 4, accessibility full; Country Life Press, Hempstead Branch, CLP, zone 4, full; Nassau Blvd, Hempstead Branch, NBD, zone 4, full; Merillon Av, Port Jefferson Branch, MAV, zone 4, full (Long Island Rail Road station points). Which streets any of them serves, and which municipal boundary a platform falls inside, are not settled by that dataset.
Oil tanks and the closure paperwork
958 occupied units report fuel oil. Where an oil tank is underground, a lawful closure is specified: state law requires tanks to be emptied, cleaned and purged of all vapors; on removal the vent and fill lines must also come out, or the fill line be capped with concrete; on closure in place, with the tank filled with an inert material such as sand, the vent lines must remain open and intact and the fill line capped or removed (underground heating oil tanks, a homeowner's guide). Evidence of that sequence, not a verbal assurance, is what an attorney should ask for.
A seller's own account of both subjects belongs on the state condition disclosure statement (the published form): the tank question at item 14, the waste system with its age and last pumping date at item 28. Where that duty goes unperformed, the form gives the buyer a $500 credit at title transfer, so an absent form is a finding rather than an oversight.