Most of Hewlett Harbor was built recently: 2% of its homes predate 1940 and the median home dates from 1956. Below: maps from 1897 on and the census since 1930.
On its age, its old homes and the National Register, Hewlett Harbor is more historic than 8% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
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HistoryA character grade: shown, never part of Hewlett Harbor’s overall grade.
New York towns list more on the Register than most of the country (a typical New York town has 12.3 per 10,000 residents, the U.S. 2.4), so Hewlett Harbor’s 0.0 sits below most of its state (10% of New York towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share (±1.7 points) is firm at this size.
Founding year: our sources. Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Hewlett Harbor’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Every edition of the U.S. Geological Survey’s map of Hewlett Harbor. Tap a year, or press play to watch the town change.
1897Hempstead sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Hewlett Harbor.
Prominent attorney Joseph Auerbach (for whom Auerbach Avenue is named) purchased large amounts of land in what would eventually become Hewlett Harbor in 1914. Auerbach, on this land, soon erected a summer home, in addition to what would become the Seawane Country Club.
Following Auerbach's sale of the country club in the 1920s, the new owners had large amounts of the club's excess land developed, with the land being subdivided and zoned for single-family residential homes.
Hewlett Harbor is more historic than 8% of U.S. towns. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
How old are the homes in Hewlett Harbor?
2% of Hewlett Harbor’s homes were built before 1940 (Census estimate, ±1.7 points), against a typical 27% for a New York town; the median home was built in 1956.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021).
From Wikimedia Commons (6), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps and U.S. Census counts (via Wikipedia). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
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